Airglas, Inc.
Manual # LH4000-106
18 |
P a g e
MANUAL REVISION B
December 3, 2012
THIS MANUAL INCLUDES INFORMATION PROPRIETARY TO
Airglas, Inc.
AND SHALL NOT BE USED TO MANUFACTURE OR REPRODUCE ANY PART OR
ASSEMBLY WITHOUT THE PRIOR WRITTEN PERMISSION OF
Airglas, Inc.
1.
Retract the skis (tires down)
2.
Pull the ski pump circuit breaker and remove the ski indicator light circuit inline fuse. Secure
the pump circuit breaker with a ty-wrap to prevent accidental activation. Placard the ski pump
breaker and the ski selector switch “Disabled”.
3.
Remove the rear check cables and the forward safety cables from the fuselage by removing
the AN395-17 clevis pins. Retain the pins for future use.
4.
Disconnect the ski hydraulic hoses from the fuselage at the bulkhead fittings. Cap the fittings
and plug the hoses with AN929 and AN806 caps and plugs respectively. Install two ty-wraps
around one of the fitting and hose pairs on each side to reduce the re-installation time.
Remove the ski hydraulic hoses from the landing gear.
5.
Hoist or jack the aircraft to attain clearance enough to allow the bungee assembly’s to slacken,
and remove the bungee assembly’s from the aircraft by removing the AN395-17 clevis pins. (If
there is no lift available: use a bungee stretcher to slacken the cable, remove the tail wheel
assembly’s and roll the aircraft back off the skis. Reinstall tail wheels after the skis are
removed.)
6.
Remove the bolts securing the yoke to the inboard flange and outboard stub axle. Repeat for
the other ski. Secure the AN960-1216 washers to the yoke in the order of their removal.
7.
Remove the LH3600-10 yoke restraining cable form the LH3600-7 stub axle by removing the
AN3 bolt. Retain the bolt for future use.
8.
Remove the skis from under the aircraft and lower the aircraft to the ground.
9.
Ensure that the aircraft weight and balance reflect the removal of the skis.
10.
Make an entry in the aircraft maintenance records recording the removal of the skis.
4.0 SKI RE-INSTALLATION
1.
Hoist or jack the aircraft. (If there is no lift available, remove the tail wheel assembly’s and roll
the aircraft on the skis. Reinstall tail wheels after the skis are installed. Use a bungee stretcher
to install the bungee cable assembly.)
2.
Install new nylon set screws in the stub axle and inboard flange. Install the screws so that
they are just flush with the minor diameter of the threads of the stub and flange.
3.
Slide the skis under the aircraft and install the LH3600-10 yoke restraining cable on each
LH3600-6 stub axle. Align the LH3600-5 yoke with the LH3600-7 stub axle and LH3600-6
inboard flange. Re-install the AN960-1216 washers in the order removed and install the two
NAS1312-5 (or AN12-17A alternate) bolts. Torque the NAS1312-5 (or AN12-17A alternate)
bolts to 70 ft. lbs. Repeat for the other ski.
4.
With the ski retracted (tires down), confirm the skis are parallel with the fuselage centerline.
5.
Hoist the aircraft high enough to install the LH3600-14 bungee
cable assy. and the LH3600-15
safety cable assy. If there is not enough lift available to allow the cable to be installed, the
bungee must be stretched using a mechanical bungee tool. Use caution when stretching the
4.0 SKI RE-INSTALLATION-CONTINUED
