(5)  
AMM 27-51-19/601, Flap Control Assembly

 (6)  
AMM 27-58-01/401, Flap Position Transmitter

 (7)  
AMM 29-11-00/201, Main Hydraulic Supply System

 (8)  
AMM 32-00-30/201, Landing Gear Door Locks

 D.
Access

 (1)  
Location Zone
 137 Body Landing Gear Well, LH
 138 Body Landing Gear Well, RH

 E.
Install the Flap Control Assembly

 S 224-014
 (1)
Examine the rod (1) connections for worn areas (AMM 27-51-19/601).

 S 124-015

 (2)  
Clean the surfaces of the flap control assembly (16) and the flap power unit (11) for an electrical bond (AMM 20-11-14/701).

 S 424-016

 (3)  
Install the flap control assembly.

 (a)  
Remove the protective cover from the flap power unit (gearbox) (3).

 (b)  
Align the spline teeth with the teeth that are not there as an index point.

 (c)  
Install the quill shaft (17) in the flap power unit (gearbox) (3).

 (d)  
Align the quill shaft (17) and the follow-up shaft splines.

 (e)  
Remove the temporary support from the input crankshaft (2).

 (f)  
Apply a layer of corrosion preventive compound on the bearing (8).

 (g)  
Install the flap power unit (gearbox) (3) and the flap control assembly (16) on the flap power unit (3). Engage the quill shaft (17) and the housing boss (4).

 (h)  
Attach the flap control assembly (16) with the four bolts (13), washers (12) and the nuts (19).

 (i)  
On the inboard flap control assembly (16), install the feedback arm (9). 1) Apply a layer of corrosion preventive compound on the

 crankshaft (2) and the nut (6). 2) Align the input arm (9) and shaft splines.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A 747-400 MAINTENANCE MANUAL
 (j)  3) Install the feedback arm on the crankshaft (2). 4) Install the clamp bolt (5) on the feedback arm (9). 5) Install the washers (7) and the retainer nut (6). 6) Tighten the nut. 7) Install the cotter pin (10).On the outboard flap control assembly (16), install the feedback arm (9). 1) Apply a layer of corrosion preventive compound to the threads of the nut (6) and the crankshaft (2). 2) Install the washers (7) and the nut (6). 3) Tighten the nut (6). 4) Install the cotter pin (10).
 S 114-017
 (4)  Clean the line between the flap control assembly (16) and the flap power unit (gearbox) (3) with solvent.
 S 624-018
 (5)  Apply a layer of primer to the line between the flap control assembly (16) and the flap power unit (gearbox) (3).
 S 434-019
 (6)  Install the flap control module (11)(AMM 27-51-10/201).
 S 434-027
 (7)  Install the RVDT (14) on the flap control assembly (AMM 27-58-01/401).
 S 434-021
 (8)  Install the limit switch pack (15) on the flap control assembly (AMM 27-51-18/401).
 S 864-022
 (9)  Remove the DO-NOT-CLOSE tags and close these circuit breakers: (a) P6, Main Power Distribution Panel 1) 6L10, FUEL CONT VALVE ENG 1 2) 6L11, FUEL CONT VALVE ENG 2 3) 6L12, FUEL CONT VALVE ENG 3 4) 6L13, FUEL CONT VALVE ENG 4 5) 6E3, PRIM LE FLAP CONT A-AC 6) 6E4, PRIM LE FLAP CONT A-DC 7) 6E5, PRIM LE FLAP CONT B-AC 8) 6E6, PRIM LE FLAP CONT B-DC 9) 6L20, TE FLAP ELEC CONT INBD

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A
747-400 MAINTENANCE MANUAL
 10) 6L19, TE FLAP ELEC CONT OTBD
 (b)  P7, Overhead Circuit Breaker Panel
 1) 7A3, AURAL WARN L
 2) 7A4, AURAL WARN R
 3) 7C18, LWR YAW DAMPER
 4) 7C9, UPR YAW DAMPER
 5) 7D13, FLT CONT CMPTR SERVO L
 6) 7D8, FLT CONT CMPTR PWR L
 7) 7D12, FLT CONT CMPTR SERVO C
 8) 7D13, FLT CONT CMPTR PWR C
　
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