North Wing Scout 912 Maintenance Manual Download

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North Wing S-LSA Maintenance Manual

Model: Scout 912

Version 3.2

Release date 04-16-2014

Page 24

3.2 Inspection Checklists

North Wing Annual and 100-hour Inspection Check List

Pre- and Post-Inspection Run-up

Completed

Pre- Post

Step

Check logbook and operating limitations.

Research Manufacturers safety directives, bulletins and letters.

Clean aircraft.

Prepare discrepancy list by walking around aircraft looking for leaks
and physical surface damage.

Clear discrepancy list.

Perform inspection

Magneto check at approx 3500 rpm:

Pre-Inspection

RPM drop #1: ___________

RPM drop #2: ___________

Differential______________

Comments:

Brake check at 3500 rpm for holding capability and pedal travel.

Comments:

After engine is at operating temperature, anchor trike securely and
slowly ramp up to maximum RPM and check EGT’s. and CHT’s

Pre-Inspection

Max RPM _____________

Max EGT #1: _________ Max CHT #1_______________

Max EGT #2: _________ Max CHT #2________________

10.

Note any excessive vibrations over the speed range

Comments:

11.

Wash exterior of engine, carriage and wing as necessary

Summary of Contents for Scout 912

Page 1: ...SA Maintenance Manual Model Scout 912 Version 3 2 Release date 04 16 2014 Page 1 Manufacturer North Wing UUM Inc 103 Gala Ave Chelan Wa 98816 USA Phone 509 886 4605 Fax 509 886 3435 Website www ultrikes northwing com ...

Page 2: ... Scout 912 S LSA This document is the North Wing S LSA Scout 912 Maintenance Manual for Types Navajo and Apache It describes the maintenance requirements and procedures for the wing carriage engine and propeller Pilot s Operating Handbook Rotax Owners Manual Rotax Maintenance Compact Disk Radio Manual If Installed BRS Parachute Manual If Installed Manuals for all installed instrumentation ...

Page 3: ...ges Date Inserted Signature Aug 15 2009 Original Issue Aug 15 2011 All V 2 2 Oct 10 2012 V 3 0 Table 1 Amendment Record Sheet NOTE North Wing s manuals will be revised as necessary Registered North Wing S LSA owners will be notified of any changes and directed to the North Wing web site http www northwing com for the applicable pages The amended pages should be printed ...

Page 4: ...enance Manual Model Scout 912 Version 3 2 Release date 04 16 2014 Page 4 and the prior page replaced in the folder as soon as possible The amendment table should at that time be updated with the appropriate details and date ...

Page 5: ...18 2 4 Ground Handling 19 2 4 1 Moving 19 2 4 2 Parking and Tie Down 20 2 4 3 Lifting 20 2 5 Lubrication 20 2 6 Replacement Parts 20 3 0 Inspections 22 3 1 Inspection Procedure 22 3 2 Inspection Checklists 24 4 0 Maintenance and Repairs 31 4 1 Maintenance Tasks 31 4 2 Wing Maintenance Quest GT5 Wing MP2 15 Mustang 3 34 4 3 Carriage Maintenance 34 4 3 1 Cleaning Exterior 34 4 3 2 Remove Rear Wheel ...

Page 6: ...4 5 Electrical System 63 4 5 1 Replacing Battery 67 4 5 2 Checking and Replacing Voltage Regulator 68 4 5 3 Testing and Replacing Magneto Switches 69 4 5 4 Testing and Replacing Master Switch 71 4 5 5 Replacing Hot Box 72 4 5 6 Replacing Starter Solenoid 72 4 5 7 Connecting 12 Volt Power to Auxiliary Equipment 73 4 6 Engine 74 4 6 1 Changing engine oil 74 4 6 2 Changing spark plugs 74 4 7 Ballisti...

Page 7: ... responsible owner who holds an FAA repairman certificate light sport aircraft with an inspection rating or equivalent Abbreviation LR I LSA Repairman Maintenance Items that can be expected to be completed on a S LSA by a responsible individual who holds a FAA repairman certificate light sport aircraft with a maintenance rating or equivalent from an FAA approved 104 hour course on Weight Shift Con...

Page 8: ...ntenance functions and tasks that can reasonably be performed by a responsible and skilled person as described above It does not address any Heavy maintenance tasks such as the removal of the engine cylinder heads gear box or electrical end of the engine block For all required maintenance on the Rotax 912 refer to the Rotax engine manual provided with your North Wing S LSA trike For heavy repairs ...

Page 9: ...ax engine is built in Austria a set of metric open end box sockets and hex wrenches may be needed The only tools that might be considered somewhat special or unusual needed for the maintenance described in this manual are the following Low range torque wrench capable of up to 230 inch pounds of torque with both metric and English size sockets High range torque wrench capable of up to 50 foot pound...

Page 10: ...ased on the data that was available at the time of its publication The latest amendments to this manual will be issued on the North Wing website in PDF format This should be printed out and added to the manual Therefore it is important that operators keep a regular check on the website for any amendments that have been made If any errors or omissions are found in this manual please advise the fact...

Page 11: ...pressure 20 psi Rear wheel hydraulic brakes Wheel pants with fin needed for 912 with full fairing Apache Dimensions Length from fairing nose to propeller 112 inches Apache Length from carriage root tube to propeller 108 inches Navajo Width side to side outside of tires 73 inches Width side to side outside of wheel pants 75 inches Total height with wing level 108 inches Wheel base rear axle to fron...

Page 12: ...eads Fuel pump driven from drive box Spark plugs NGK DCPR7E Optional Equipment External alternator Carburetor heat Ultra quiet dual exhaust 2 1 3 Fuel System Standard Configuration 16 gallon translucent polymer fuel tank Electric fuel gauge with panel display Engine driven fuel pump See through in line fuel filter Cable driven dual throttle actuators from front seat right foot and hand throttle Re...

Page 13: ...or relay fuse box Strobe light mounted at rear below BRS mount Electronic Instrument System Optional Equipment Navigation position lights red green white mounted on wing tips for flight after civil twilight In dash Radio ATC Transponder with encoding altimeter 2 1 7 Instrumentation System Standard Configuration Electronic Instrument System EIS Standard Functions 1 Alarm and limit setting 2 Exhaust...

Page 14: ...cations are referred to as Snug connections in this manual The limiting factor in the tightening of most Nylock applications on tubing is to avoid distorting the tubing circular shape For those applications where significant torque should be used a recommended torque is specified in the table below Castle nut fasteners are used for applications where the bolt is exposed only to shear stresses and ...

Page 15: ... Snug Seat frame to main base tube 1 4 Nylock Snug Mast connection bolts 5 16 Nylock Snug Mast pivot bolts 5 16 Nylock Snug Nose tube upper bolt nut 1 4 Castle pin Secured Nose tube lower bolt nut 1 4 Castle pin Secured Engine Engine mount bolts 10mm Castle nut cotter pin 310 Exhaust flange bolts 8mm Lock nut 106 Carburetor boot hose clamps Snug All others See Rotax manual Electrical System Spark ...

Page 16: ...ock assemble top bolt 3 8 Castle safety pin Snug Pivot block assemble middle two bolts 3 8 Nylock Snug Pivot block assemble bottom bolt 3 8 Nylock Snug Nose plate to leading edge bolts Nylock Snug Crossbar plate to crossbar bolts Nylock Snug Nose wire catch assemble to keel tube Nylock Snug Crossbar to leading edge attachment bolts 3 8 eye bolt Castle safety wired Secured Attachment bracket on lea...

Page 17: ...280 lbs 0 280 lbs The trike center of gravity CG is adjusted by sliding the pivot block retaining collars forward and aft to the desired position The range is measured by the distance from the front edge of the front retaining collar to the front tip of the keel tube not nose bracket See the sketch below In its forward most position the front collar is up against the control frame apex This is a d...

Page 18: ... retaining collar to the front tip of the keel tube not nose bracket See the sketch below In its forward most position the front collar is up against the control frame apex This is a distance of 50 from the keel tube tip The pivot block assembly may be moved rearward a maximum of 3 resulting in a measurement from the keel tube tip to the front collar of 53 The hang point is changed by loosening th...

Page 19: ... lifting the nose too high 3 Avoid wear of the base tube due to rubbing against the nose tube 4 Avoid wing tip damage due to scraping the ground or hitting objects 2 4 1 Moving To safely move the trike with the wing attached use the following procedure 1 Anchor base tube securely to carriage either with a bungee or strap holding the base tube against the nose tube or by using the seat belts to hol...

Page 20: ...ng lubrication and the recommended lubricant are given in the following table Bearings on North Wing S LSA aircraft are permanently sealed and do not require lubrication LOCATION INTERVAL RECOMMENDED LUBRICANT Engine gear case lubrication and filter Note INTERVAL is dependent on type of fuel used per Rotax manual Initial oil and filter change after 25 hours 50 hours unless using leaded fuel 25hour...

Page 21: ... Thereafter replace every 100 hours or sooner if required by inspection North Wing or aircraft parts dealer Fuel lines 300 hours or sooner based on inspections Gates automotive fuel line North Wing or aircraft parts dealer Tires Standard Optional oversize Based on inspections 6 00 x 6 4 ply 8 00 x 6 4 ply North Wing or local tire dealer Coolant 3 years or 200 hours or whenever drained for repairs ...

Page 22: ... assure all points are being checked If the annual or 100 hour inspection is performed properly there is no need for additional more in depth inspections at longer intervals All degradation mechanisms are covered in the standard annual 100hour inspections 3 1 Inspection Procedure The following steps must be followed prior to performing the actual inspection to achieve an effective inspection 1 Cle...

Page 23: ...ow all heated components to cool enough to touch 10 Wash aircraft engine wing and outer surface according to instructions provided in subsequent maintenance sections of this manual so that other non obvious problems can be seen 11 Print out and perform detailed inspection per the following inspection checklist 12 It is recommended to print out and perform the applicable inspection in the Rotax Lin...

Page 24: ...surface damage 5 Clear discrepancy list 6 Perform inspection 7 Magneto check at approx 3500 rpm Pre Inspection RPM drop 1 ___________ RPM drop 2 ___________ Differential______________ Comments 8 Brake check at 3500 rpm for holding capability and pedal travel Comments 9 After engine is at operating temperature anchor trike securely and slowly ramp up to maximum RPM and check EGT s and CHT s Pre Ins...

Page 25: ...1 2 mm diameter needle Check tensioned sail for 1360 grams pulling upward 6 Remove all ribs and check for damage and symmetry against the template provided by North Wing 7 Rib tensioning Check leech line cords or snap tips on ribs for wear and proper tension or check flip tips at end of ribs for cracks 8 Wing strut attachment bolts tightened to snug fit See torque table Section 2 and no visible we...

Page 26: ...gn of cracking or broken welds 9 Engine mounting plates are secure attachment 10 Fuel tank is secure and no sign of cracks or leaks 11 Fuel tank sump drain works properly and no water in tank 12 Fuel tank vent is not blocked 13 Fuel tank cap fits secure 14 Fuel lines are flexible and are not leaking 15 Fuel filter is not contaminated cracked or obscured 16 All fuel lines are secured from rubbing a...

Page 27: ...spection should refer to the details in the Rotax Line Maintenance Manual provided with the North Wing trike for any questionable items 1 Spark plugs for wear and indication of improper fuel mixture 2 Check rubber engine mounts for damage cracks and security 3 Carburetor boots for cracks 4 Throttle and choke cables are properly routed and not kinked 5 Throttle and choke cable boots at carburetor a...

Page 28: ...he following checks on the electrical system and instrumentation 1 Ignition coils on engine are clean and securely mounted 2 Ignition wires to spark plugs are secure and firmly snap on spark plug caps 3 Wiring harness coming out of engine ignition end for cleanliness abrasions cracks or exposed conductor wires 4 Hot box or relay fuse box electrical connections for proper torque and integrity of in...

Page 29: ... and temperature 7 Propeller smoothness 8 Mag drop 1 2 9 Mag switch operation 10 Idle RPM 11 Static RPM note EGT and CHT in limits 12 Throttle operation 13 Engine instruments operational and within limit North Wing Annual and 100 hour Inspection Check List continued General Pass Fail Check the following 1 Aircraft conforms to operating limitations 2 All Safety Directives bulletins and letters comp...

Page 30: ..._____________ Owner_________________________________________________________________ Type Inspection______________________________ Tach Time__________________ Total time________________ Name of inspector___________________________________________________ Certificate Number___________________________________________________ Signature__________________________________________________________ ...

Page 31: ...er than removal of nonstructural items 5 Making simple fabric repair not requiring stitching 6 Replenishing brake fluid 7 Refinishing decorative coatings when disassembly is not required 8 Repairing upholstery when disassembly is not required 9 Making small repairs to fairings not changing the contour of the fairing 10 Replacing safety belts 11 Replacing seat parts where disassembly isn t required...

Page 32: ...M A P 8 Reposition front fork assembly LSR M A P 9 Repair replace front fork assembly LSR M A P 10 Replace Seat frame LSR M A P 11 Replace main dual mast LSR M A P 12 Replace seat belts Owner LSR M A P 13 Replace mast lift cylinder Owner LSR M A P 14 Replace engine mount tubes LSR M A P 15 Repair radiator leak in radiator and or hoses LSR M A P 16 Remove and repair Apache Fairing Owner LSR M A P F...

Page 33: ...l Model Scout 912 Version 3 2 Release date 04 16 2014 Page 33 Engine Section 4 6 1 Replacing oil filter oil Owner LSR M A P 2 Replacing spark plugs Owner LSR M A P 3 Prop change and Blade Pitch change Pre Prop Manufacturers instruction ...

Page 34: ...ing the area with WD 40 and wipe off with a dry rag or paper towel Follow up with mild detergent to remove the residual film and rinse well with clear water Avoid wetting electrical wires and connections air filter and throttle choke and BRS cables by protecting with a plastic cover Avoid spraying WD 40 or other degreaser on air filter fabric side bags wing fabric electrical components or metal co...

Page 35: ...h a short plate with two bolt holes on the end of the rod for much smaller mounting bolts Both are shown below 1 Remove the two bolts on the inside or backside of the wheel pants using a 3 8 wrenches 2 For the earlier design with only one long bolt on the outside remove the long bolt holding the outer side of the pant along with the 2 7 8 spacer This AN 5 33A bolt is threaded into the end of the w...

Page 36: ...f of wheel 4 3 3 Replace Rear Tire Skill Level Owner LSR M A P Tools 1 1 8 Socket two 7 16 wrenches 3 8 Hex wrench socket Materials Replacement tire inner O rings Task Description If the tire is being replaced due to wear it is recommended the O ring seals inside the rim be replaced at the same time to avoid additional downtime in the near future 1 Remove wheel pants as described above in Section ...

Page 37: ...et by unscrewing it off the axle thread 3 Raise both axles off ground with wood blocks as shown below 4 Remove large nut on end of wheel with 15 16 socket DO NOT remove six smaller bolts Wheel is a tubeless split hub and the two halves are held together with these six bolts Wheel nut 15 16 Socket Block under wheel pants mounting plate on both sides Unscrew wheel pant support bracket ...

Page 38: ... stopping pins will also be removed when these bolts are removed 7 Using a smooth flat bar pry the rim halves off the tire Note there is an inner circular disk with 2 O rings sandwiched between the rim halves These O rings seal the two halves from air leakage If the O rings are not being replaced be careful not to damage them 8 Put the plate holding the brake stopping pins in position on the inboa...

Page 39: ...ey are not aligned with the seat 6 Remount wheel and wheel pants 4 3 5 Hegar Brake System Replace Pads Calipers and Disc Bleed Adjust Brakes Skill Level LSR M A P Tools 1 1 8 Socket Hex Allen key 1 8 ignition box wrench clean pump type oil can or syringe for brake fluid injection Materials Replacement brake pads ATF fluid 12 x 1 8 rubber or neoprene tubing Task Description Depending upon the year ...

Page 40: ...he key with a mallet If the caliper is NOT being replaced or serviced slide it just past the key so the bolts on the back side can be removed in subsequent steps 4 At this point the disc can be removed and replaced if necessary and the brake pads can be removed and replaced 5 Using a 5 32 hex wrench remove the 3 button head screws on the outboard side of caliper and remove outboard pads NOTE Do no...

Page 41: ...ng the brake repair Air in the lines will result in a very soft brake pedal and excessive pedal movement If sufficient air is in the system there will be no braking action at all Bleeding the brakes is best done with two people For best results it is necessary to have the bleeder valve on the caliper at the lowest point This is because the brake fluid will be forced from the wheel caliper back to ...

Page 42: ...ht fit it will try to slide off particularly when you open the bleeder valve Using a wrench open the bleeder valves normal right hand thread on the master cylinder and on one 1 wheel caliper about turn One person should hold the tubing on the master cylinder and work the bleeder valve at that end while a second person pumps ATF fluid Dextron II or III through the line from the caliper to the maste...

Page 43: ...ble from North Wing can be inserted on the calipers behind the pads to hold the pads closer to the rotor thus resulting in less brake pedal travel and more braking pressure A second method is to pressurize the brake lines after bleeding them to push the wheel caliper out somewhat Doing this moves the pad closer to the rotor when the pedal is completely retracted Consequently the pedal does not hav...

Page 44: ...is not necessary to rotate the wheel caliper to get the port on the bottom Therefore that step is also eliminated compared to the Hegar brake procedure 4 3 7 Replace Front Tire Skill Level Owner LSR M A P Tools 1 1 8 wrench and socket smooth flat bar socket hex wrench Materials Replacement tire Task Description The front tire can be replaced without any disassembly of any other elements of the car...

Page 45: ...d wheel assembly out from under the carriage fairing and front suspension system 4 With wheel removed from axle remove the six 1 2 nuts holding the split rim together The bolt requires a 3 16 hex wrench 5 Using a smooth flat bar pry the rim halves off the tire Note there is an inner circular disk with 2 O rings sandwiched between the rim halves These O rings seal the two halves from air leakage If...

Page 46: ...ing is driven out of its seat 11 Align new bearings in their seats and gently tap them in with a rubber or wooden mallet or block of wood Be careful not to drive them hard when they are not aligned with the seat 12 Remount wheel DO NOT over tighten wheel nut Bring nut snug onto bearing then back off turn 4 3 8 Reposition Front Fork Assembly Skill Level LSR M A P Tools 1 2 wrench and socket 2 7 16 ...

Page 47: ...he front steering pegs and mark the position on the inner tube through the hole in the outer tube where the locking bolt needs to be Drill a new 3 16 hole in the inner tube Do not drill straight through Drill each hole from its respective side 7 Re insert the bolt in the instructor s connecting link between the front and rear pegs 4 3 9 Repair Replace Front Fork Assembly Skill Level LSR M A P Tool...

Page 48: ... the wing must be removed before the seat frame can be removed 1 Remove wing from trike 2 Tie main mast in upright position using a soft piece of rope tied from the mast to the gear case 3 With mast in upright position unclip and remove the attachment pin at lower end of cylinder on both sides and tie pneumatic cylinders clear of seat frame 4 Pull seat belt straps out from seat cushions 5 Remove s...

Page 49: ...e electronics box to the metal plate and lower the box clear of the seat frame straps 8 The rear metal seat plate along with the front seat backrest can now be lifted out from the seat frame as a unit and set aside 9 Remove screw in front seat plate holding plate to support tube Remove front seat plate and set aside 10 If a fairing is installed remove the top screws securing the fairing to the met...

Page 50: ... position with wood block or other soft material 12 Remove two bolts from top back of seat frame where it is attached to the backframe 13 Remove two bolts from lower front of seat frame where it is attached to the root tube mounting plate Fairing attachment screws 2 each side Top rear attachment to backframe Support straps for rear seat metal plates with adjustment buckle ...

Page 51: ...ual Mast Skill Level LSR M A P Tools Two wrenches Materials Replacement parts Task Description If the main mask is bent or damaged it must be replaced as follows 1 Remove wing from trike 2 Release mast hold down so that mast is in full upright position 3 With mast in upright position unbolt pneumatic cylinders from mast end and rotate cylinders clear of mast 4 With help from a second person remove...

Page 52: ...ckframe The rear seat shoulder harness is attached to the main mast 1 Pull seat belt straps out from seat cushion slots 2 Remove seat cushions by pulling them loose from their velcro attachments There are straps on the front corners on the underneath side of the seat cushions that slide over the metal plate under the cushions Be sure to slide the front edge of the cushion off these metal plates Se...

Page 53: ... mast 4 3 13 Replace Mast Lift Cylinder Skill Level Owner LSR M A P Tools 7 16 wrench Materials Replacement parts Task Description If the mast lift cylinder fails to hold mast upright with wing attached the pneumatic cylinders should be replaced as follows 1 Remove wing from trike 2 With mast in full upright position unclip and remove the pin at lower end of cylinder Pin Clipped Pin Unclipped 3 Un...

Page 54: ...ot coming from some other source If it is apparent the radiator itself is leaking or damaged it must be removed and sent to a radiator repair shop 1 Drain all coolant from cooling system at system drain valve 2 Remove hose clamps from leaking radiator at both ends Typically the hoses will be stuck on the radiator inlet and outlet and will need to be twisted If they cannot be removed by twisting by...

Page 55: ...m by gripping trim and gently pulling straight off Do not pull on the portion of the trim that is already off like a rope to peel off the remaining attached portion This will stretch the trim and possible tear it making remounting difficult 4 To remove the side panels remove the two screws on upper rear of side panels Remove one bolt on lower rear of each panel Remove MAG switch housing under righ...

Page 56: ...ting dormant for several days It is not intended for continuous use when the engine driven fuel pump is working as designed A fuel pressure regulator was used on some units with the earlier Rotax 912 engine After Rotax added a fuel pressure regulator in the carburetor crossover line this external regulator became unnecessary Your unit may or may not have a pressure regulator If so the fuel pressur...

Page 57: ...ilter itself If the line is not easily removed by pulling with a twisting motion slice the line along the length at the fitting end for just the length of the fitting The line should easily slide off the fitting once sliced 4 Cut new lines the required length using the old line as a guide Be sure to allow for ends that were cut off separately 5 Route the lines around and through other components a...

Page 58: ...evel LSR M A P Tools US sockets set box wrenches Philips screw driver Material Replacement tank Task Description The fuel tank is very durable and it would be rare that it needed to be replaced If damaged sufficiently to need replacement the steps given below are necessary In some cases the tank might be repairable by a professional welder experienced with Plastic Welding Of course the tank would ...

Page 59: ...aking If it is the valve it should be replaced by a North Wing supplied drain valve 1 Drain all fuel from the tank and put in clean container if intended to be put back in fuel tank after repair 2 Unscrew the drain valve normal right hand thread from the bottom of the tank 3 Coat the valve threads with a high quality plumbers sealant certified for use with gasoline and oil 4 Start screwing the new...

Page 60: ...oint sensor follow the instructions below for calibrating the sending unit If you have the Princeton unit follow the instructions in Appendix A of this manual Two Point Sensor Calibration The fuel sending unit must be calibrated using the procedure below to properly indicate the range of operation The gage is located under the rear seat on top of the fuel tank and just below the electrical hot box...

Page 61: ...ank using a stiff wire with a hooked end and pull it out Tie the two ends of the string or wire together so that one end cannot slip out of the bolt hole when the remaining two screws are removed Now remove the remaining 2 screws and remove the retaining ring through the hole in the tank There is a notch in the ring to make this fairly easy to do Re assemble using the same technique but make sure ...

Page 62: ...eedle indicates the liquid level in your tank For best results the probe should be fully immersed in a full tank If you accidentally adjust below your tank level turn the FULL screw full cw and repeat this setting Remove the unit from the tank Shake the unit a few times to remove the residual liquid The needle should now rest on or below the empty mark This completes the calibration ...

Page 63: ...e to replace the coil assembly The lighting coils cannot be individually replaced Instead the entire set of lighting and ignition coils must be replaced as a single unit Operation at the full 250 watts for short periods of time is acceptable and should not damage the coils For miscellaneous accessories a power socket is provided on the instrument panel that will accommodate up to approximately an ...

Page 64: ...North Wing S LSA Maintenance Manual Model Scout 912 Version 3 2 Release date 04 16 2014 Page 64 4 2012 3 2015 ...

Page 65: ...North Wing S LSA Maintenance Manual Model Scout 912 Version 3 2 Release date 04 16 2014 Page 65 3 2015 ...

Page 66: ...North Wing S LSA Maintenance Manual Model Scout 912 Version 3 2 Release date 04 16 2014 Page 66 Version before 4 2012 With HOT BOX ...

Page 67: ...s on one day will bring the battery up to a level that will sustain enough power to start the engine a week or so later If the battery does not accept or hold a charge as described above it will not hold a direct charge either and it needs to be replaced following the procedure below 1 Disconnect two black ground wires from negative terminal of battery and move them a safe distance from the batter...

Page 68: ...a volt meter measure the DC voltage between the red lead you just removed from the Hot Box and ground which can be the aluminum case of the Hot Box If 12 14 VDC is present regulator is functioning properly 5 If no voltage is present or the voltage is lower than 12 volts it could mean a defective regulator wire or alternator To determine which is the case continue with Step 6 6 Measure the AC volta...

Page 69: ...g the Regulator 1 Remove the 6 pin connector from the regulator 2 Remove the two nuts top and bottom attaching the regulator to the Hot Box 3 Install new regulator 4 5 3 Testing and Replacing Magneto Switches Skill level LSR M A P Tools Philips screw driver Ohm meter or continuity tester Parts Replacement Switches or wire connectors Task Description The North Wing Apache may have one set of mag sw...

Page 70: ...ne until the engine stops Fuel shut offs are not provided on North Wing aircraft because of the high probability of someone forgetting to open it but still having enough fuel in the carburetor to get off the ground With Instructor Switches Installed Pilot Switches Instructor Switches Results Ign A Ign B Ign A Ign B On On On On Engine runs on both ignition systems On Off Off Off Engine will not run...

Page 71: ... If any of these symptoms occur the Master switch most likely needs to be replaced using the following procedure 1 Disconnect the negative terminal of the battery and secure it away from the battery 2 For the Navajo model remove the six screws holding the control panel in the instrument housing and rotate the panel forward to expose the back side of the Master switch For the Apache model with the ...

Page 72: ... wires away from battery 2 Disconnect heavy 6 red wire coming from Hot Box going to starter 3 Disconnect the two electrical plugs between the Hot Box and the engine 4 Label and remove all wires connected to the Hot Box 5 Drill out the 4 rivets holding Hot Box to the backframe with a 3 16 drill 6 Remove Hot Box and install new box in reverse order 4 5 6 Replacing Starter Solenoid Skill level LSR M ...

Page 73: ...escription at the beginning of this Section on Electrical Repairs The easiest way to add accessories is to use the 12V plug on the instrument console with an adapter for the specific accessory If a more permanent connection is desired a wire can be connected to the terminal strip of the Hot Box Note from the electrical schematic above that only the first three terminals on the middle terminal stri...

Page 74: ...oil filter wrench oil filter cutter drain pan Parts 3 liters of suitable oil See Rotax Service Instruction SI 912 016 Rotax oil filter P N 825 012 Task Description See Rotax Line Maintenance manual Section 12 20 00 page 49 for procedure 4 6 2 Changing spark plugs Skill level Owner LSR M A P Tools 5 8 spark plug socket ratchet handle and extension calibrated Torque wrench spark plug feeler gages Pa...

Page 75: ...dressed in the BRS installation procedures Furthermore when the parachute is due for re packing it must be removed from the frame and sent back to the BRS factory With the exception of mounting the BRS bracket to the NW trike mounting plate the installation and removal tasks are described in the BRS manual All tasks associated with the BRS can be performed by a conscientious and mechanically adept...

Page 76: ... mark the location of the other two mounting plate holes on the BRS bracket 3 Remove the BRS mounting bracket and drill a hole where marked for the mounting plate 4 Replace the BRS bracket on the mounting plate and install and tighten all four bolts 5 Continue from this point on using the BRS supplied instructions Use two of these holes in the circle rk and drill two ditional holes as shown ...

Page 77: ...North Wing S LSA Maintenance Manual Model Scout 912 Version 3 2 Release date 04 16 2014 Page 77 Appendix A Princeton Fuel Level Sending Unit ...

Page 78: ...North Wing S LSA Maintenance Manual Model Scout 912 Version 3 2 Release date 04 16 2014 Page 78 Princeton Level Sensor Description ...

Page 79: ...North Wing S LSA Maintenance Manual Model Scout 912 Version 3 2 Release date 04 16 2014 Page 79 Princeton Level Sensor Installation ...

Page 80: ...North Wing S LSA Maintenance Manual Model Scout 912 Version 3 2 Release date 04 16 2014 Page 80 Princeton Level Sensor Calibration ...

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North Wing Scout 912, Maintenance Manual

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