(2)  
17MIT65B04017 Leading Edge Flap Drive Unit Lock

 B.
Consumable Materials

 (1)  
D00013 Grease - MIL-G-23827

 (2)  
C00308 Corrosion Preventive Compound - MIL-C-11796, Class 3

 C. Parts ~.............................................................................. | AMM | | AIPC | ................. ...........................| | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ...............................................................................| | 401  |  1 | Actuator | 27-81-51 | 01 | 140 | | | 3 | Bolt (2 Top) | | | 115 | | | 4 | Washer | | | 130 | | | 4 | Washer (On Jumpers) | | | 125 | | | 5 | Nut | | | 135 | | | 10 | Bolt (6 Bottom) | | | 120 | | | 11 | Jumper (Outbd Flaps) | 27-81-02 | 01 | 40 | | | 11 | Jumper (Midspan Flaps) | | 05 | 20 | | | 11 | Jumper (Inbd Flaps) | | 10 | 40 | | | 13 | Screw | 27-81-51 | 01 | 10 | 2......…........…...................................…...........…......….......1
 D. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 27-81-00/201, Leading Edge Flap System

 (3)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (4)  
AMM 36-00-00/201, Pneumatic System

 (5)  
OHM 27-81-11 Leading Edge Flap Drive Shaft Assemblies

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 (6)  
SSM 27-81-01, SSM 27-81-02, SSM 27-81-03, SSM 27-81-04,
 SSM 27-81-05, SSM 27-81-06

 (7)  
WDM 27-51-21, WDM 27-51-22, WDM 27-81-11, WDM 27-81-12,
 WDM 27-81-21, WDM 27-81-22, WDM 27-81-31, WDM 27-81-32,
 WDM 27-81-41, WDM 27-81-42, WDM 27-81-81, WDM 27-81-82

 E.
Access

 (1)  
Location Zone
 522 Variable Camber Flap, LH
 523 Variable Camber Flap, LH
 524 Variable Camber Flap, LH
 525 Variable Camber Flap, LH
 526 Variable Camber Flap, LH
 532 Variable Camber Flap, LH
 533 Variable Camber Flap, LH
 534 Variable Camber Flap, LH
 535 Variable Camber Flap, LH
 536 Variable Camber Flap, LH
 537 Variable Camber Flap, LH
 622 Variable Camber Flap, RH
 623 Variable Camber Flap, RH
 624 Variable Camber Flap, RH
 625 Variable Camber Flap, RH
 626 Variable Camber Flap, RH
 632 Variable Camber Flap, RH
 633 Variable Camber Flap, RH
 634 Variable Camber Flap, RH
 635 Variable Camber Flap, RH
 636 Variable Camber Flap, RH
 637 Variable Camber Flap, RH

 F.
Install the Rotary Actuator

 S 224-024
 (1)  Do this task if you install a used drive shaft and coupling: "Leading Edge Flap Drive Shaft Assembly Inspection/Check" (OHM 27-81-11, Curtiss Wright CMM 27-80-02).
 S 424-022
 CAUTION: MAKE SURE TO INSTALL THE CORRECT ROTARY ACTUATORS ON THE DRIVE
_______ ARMS. ON THE DRIVE ARM WITH TWO ROTARY ACTUATORS (FLAPS 6 THRU 10 AND 17 THRU 21), THE TWO ACTUATORS MUST HAVE THE SAME DASH NUMBER. THIS DOES NOT INCLUDE THE -9 ACTUATOR, WHICH YOU CAN USE WITH THE -11 ACTUATOR. IT ALSO DOES NOT INCLUDE THE -7, -13 AND -15 ACTUATORS, WHICH YOU CAN USE WITH EACH OTHER. FAILURE TO INSTALL THE CORRECT ROTARY ACTUATORS ON THE SAME DRIVE ARM CAN CAUSE DAMAGE TO THE VARIABLE CAMBER FLAPS.
 (2)  
Install the rotary actuator (Fig. 401):

 (a)  
Apply a thin layer of grease to the actuator, drive shafts and flap linkage splines.

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747-400 MAINTENANCE MANUAL
 (b)  Apply a layer of the corrosion preventive compound to the
 mounting bolts and bolt holes.
　
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