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ATA 61-07-19

(E-3719)

OPERATION- AND INSTALLATION AND MAINTENANCE

MANUAL

REVERSIBLE HYDRAULICALLY CONTROLLED

VARIABLE PITCH PROPELLER

MTV-28-2-( )-R(H)

Release date: December 10

, 2020

DE.21G.0008

EASA.21J.020

Содержание MTV-28-2 Series

Страница 1: ...ATA 61 07 19 E 3719 OPERATION AND INSTALLATION AND MAINTENANCE MANUAL REVERSIBLE HYDRAULICALLY CONTROLLED VARIABLE PITCH PROPELLER MTV 28 2 R H Release date December 10th 2020 DE 21G 0008 EASA 21J 020...

Страница 2: ...ces of failures particularly of the fatigue type It is essential that the propeller be properly maintained according to the recommended service procedures and a close watch be exercised to detect impe...

Страница 3: ...le of contents Table of contents 2 List of effective pages 3 List of revisions 4 1 General 6 2 Model designation 10 3 Typical Blade Design 11 4 Design and operation information 12 5 Installation and o...

Страница 4: ...2020 12 10 25 2020 12 10 6 2020 12 10 26 2020 12 10 7 2020 12 10 27 2020 12 10 8 2020 12 10 28 2020 12 10 9 2020 12 10 29 2020 12 10 10 2020 12 10 30 2020 12 10 11 2020 12 10 31 2020 12 10 12 2020 12...

Страница 5: ...Page 4 Initial Revision 2020 12 10 ATA 61 07 19 LIST OF REVISIONS Revision No Revision Date Pages Description 1 2020 12 10 All pages Initial Revision...

Страница 6: ...nd should be complied promptly These are sent to dealers distributors and latest registered owners Service Letters deal with products improvements and service hints pertaining to the propeller and its...

Страница 7: ...a is included in this publication Also the hovercraft manufacturer s manuals should be used in addition to this information 1 2 Additional Available Publications In addition to this manual the followi...

Страница 8: ...ich employs a governing device to maintain a selected engine RPM Crack Irregularly shaped separation within a material sometimes visible as a narrow opening at the surface Delamination Internal separa...

Страница 9: ...A non rotating propeller FOD does not require an overhaul it only needs a blade repair or a blade exchange Blade damage with a non rotating propeller cannot damage the propeller hub and therefore does...

Страница 10: ...an overhaul 1 5 3 Component Life Component life is expressed in terms of total hours of service TSN Time Since New and in terms of hours of service since overhaul TSO Time Since Overhaul Both referenc...

Страница 11: ...everse System Hovercraft 8 R Reversing System installed 7 F Feathering System installed 6 Letter Designation Counterweights C Counterweights mounted for pitch change moments towards high pitch feather...

Страница 12: ...Moment Towards High Pitch CR Pitch Change Pin for Reversing Pitching Moment Towards High Pitch CFR Pitch Change Pin for Feathering Reversing Pitching Moments Towards High Pitch The complete propeller...

Страница 13: ...ield for better repair replacement or shipping The inner part of the hub is filled with oil on the front is the dual acting cylinder mounted for the pressure oil this arrangement allows a simple and l...

Страница 14: ...composite Spinner rear support plate and the mid support plate are parts of the hub The spinner front support dome is mounted to the drive shaft adapter The dome is mounted on the supports by means o...

Страница 15: ...the two interfaces rotor side hydraulic actuator side must be 0 05 The alignments tolerances must be 0 2 mm 0 008 in If the distance between the engine propeller drive shaft to the adjusting unit is...

Страница 16: ...Page 15 Initial Revision 2020 12 10 ATA 61 07 19 Drawing MTV 28 2 AZ R H P 1582 1...

Страница 17: ...Page 16 Initial Revision 2020 12 10 ATA 61 07 19 Drawing Beta rod P 1587 X...

Страница 18: ...r overhauled propeller may leave grease on the blades and inner surface of the spinner dome This is normal and does not imply a continuing grease leakage Remove any grease on the blades or inner surfa...

Страница 19: ...e that metal chips or other impurities are present on the threads fretting can occur during blade installation and the ferrules may be scrapped Clean the threads thoroughly e g with a brass brush Lubr...

Страница 20: ...Page 19 Initial Revision 2020 12 10 ATA 61 07 19 Figure 5 Cleaned and degreased surfaces Figure 6 Cleaned surface no polishing allowed no greasing allowed...

Страница 21: ...resonance body Listen carefully for abnormal sounds during the installation of the blade into the outer ferrule In case any odd sounds appear screw the blade out check the thread for possible damage...

Страница 22: ...f the blade Record the pin position used for each blade in accordance to the hub serial number Tighten the stop nut 6 3 of the clamp screw 6 1 with 210 220 N 155 162 ft lbs of torque after the anti ro...

Страница 23: ...prevents moisture and contaminating dirt entering the blade thread between inner and outer blade ferrule see Figure 11 Only use original O rings approved by manufacturer Before the pin installation s...

Страница 24: ...the housing 1 1 and mount it onto the cartridge aft end cap torque all screws with 8 2 9 4 Nm 6 6 9 ft lbs Secure all screws with safety wire After assembly of the spacer actuator insert the beta rod...

Страница 25: ...Page 24 Initial Revision 2020 12 10 ATA 61 07 19...

Страница 26: ...check blade angle 40 2 To minimize internal leakage use the adjusting rod to move the beta tube additional 2 mm 0 08 in out of the adjusting unit Neutral pitch at a blade angle of 2 need to be determi...

Страница 27: ...ve grease on the blades and inner surface of the spinner dome This is normal and does not imply a continuing grease leakage Remove any grease on the blades or inner surface of the spinner dome by usin...

Страница 28: ...CHECK THE BLADE SHAKE IN CHORD DIRECTION SEE FIGURE 13 Check the relative movement of the blade preload nut to the hub during the blade shake test No visible play is allowed If the check shows results...

Страница 29: ...ot damage the preload bearing Adjusting unit and beta rod Check for corrosion on adjusting unit and beta rod In case corrosion is found remove corrosion by polishing with abrasive paper and apply stic...

Страница 30: ...pair see Service Letters SL 32 and SL 32 2 Attention The aerodynamic properties of the airfoil must not be disturbed when performing a repair Apply a layer of lacquer to protect the repaired spot agai...

Страница 31: ...parts is defined in the applicable service manual 6 5 Overspeed Overtorque When a propeller has an overspeed event refer to the engine overspeed limits Figure 16 to determine the corrective action to...

Страница 32: ...ponents Aluminum Hub Visually inspect the blade retention area of the blade socket Composite Blades Perform a thorough visual and coin tap inspection see Figure 17 of the exposed portion of each blade...

Страница 33: ...ect areas prone to corrosion remove the corrosion and re grease as applicable In case of doubts regarding corrosion please send pictures of the affected areas to the technical support of MT Propeller...

Страница 34: ...ated inside the hub and are not exposed to the environment The hub is filled with 10 l 2 6 gal HLP 100 oil for lubrication which does not need to be refilled In the hub two oil filler bores provide th...

Страница 35: ...leak does not spray more than 18 cm 7 in on the blade surface from the blade root outside the blade ferrule in 5 hours of operation it is defined as minor and should be only monitored Continued grease...

Страница 36: ...e labeled with a decal on blade no 1 to inform service station personnel that the existing balance weight configuration may not be correct for static balance 7 2 16 Register number and location of sta...

Страница 37: ...Page 36 Initial Revision 2020 12 10 ATA 61 07 19 Figure 20 balance weight B 486...

Страница 38: ...Page 37 Initial Revision 2020 12 10 ATA 61 07 19 Figure 21 Boot B 683 6...

Страница 39: ...the electric actuator the blade retention system needs to be inspected Contact manufacturer 8 3 Surging RPM Cause 1 Residual oil 2 Abrupt movement of propeller or throttle control 3 Instrumental erro...

Страница 40: ...OT APPEAR AT ONCE AND GETS WORSE OVER TIME IT SHOULD BE OBSERVED 3 Contact manufacturer 4 Repair propeller 8 6 Oil leakage visible outside or hidden inside Cause Damaged seals Remedy Replace gaskets o...

Страница 41: ...4 months after new assembly or overhaul and proper storage provided the TBO automatically starts after this 24 months up to maximal 84 months of calendar time 9 4 In case the propeller is stored for l...

Страница 42: ...a padded support that supports the entire length of the propeller If applicable remove the plastic dust cover cap from the propeller mounting flange 9 10 Lifting To lift the propeller pick up the pro...

Страница 43: ...Page 42 Initial Revision 2020 12 10 ATA 61 07 19 12 PROPELLER DRAWING MTV 28 2 AZ R H Drawing No P 1582...

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