535 
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D.  Return airplane to it's normal condition.
(1)  
Remove hydraulic system A power (Ref 27-51-0 MP).

(2)  
Remove electrical power if no longer required.

535 
Oct 20/86  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  27-51-01 Page 525 

INBOARD TRAILING EDGE FLAP - REMOVAL/INSTALLATION
1.  General
A.  Each trailing edge flap consists of a foreflap, a midflap, and an aftflap.
B.  The upper leading edges of the foreflap and midflap are finished with an abrasion resistant teflon coating. For repair of teflon coating, refer to Chapter 51, Abrasion Resistant Teflon Finishes.
C.  The midflap carriage forward rollers are mounted in eccentric bushings. Rotation of these bushings will raise or lower the flap trailing edge. These bushings are adjusted to fair flap trailing edge with wing chord plane.
2.  Equipment and Materials
A.  Inboard Flap Rigging Tools:
(1)  
Inboard Flap Rigging Beam - F80209-3 (Preferred) (Ref 27-09-700)

NOTE: Rigging Beam is a part of F80209-1.

(2)  
Inboard Flap Rigging Tool - 2TE65-73720-1, -2 (Optional)

B.  Flap Drive Adapter - F70300-1
C.  Rigging Pins, F-5 and F-6 - 0.248 +0.000/-0.002 inch diameter, 3.7 +0.25 inches long
(MS20392-3)

NOTE: Rigging pins are part of kit F70207-61, or -84.
D.  Control Column Protractor Assembly 4MIT65B80307-1 (Preferred) or F52485-500 (Optional)
E.  Protractor Stand Assembly - F71292-17
F.  Primer - BMS 10-11, Type I (Ref 20-30-41)
G.  Corrosion Preventive Compound - MIL-C-11796, Class 3 (Ref 20-30-21)
H.  Pressure, Environmental and Fuel Cavity Sealant - BMS 5-79 (Ref 20-30-11)
I.  Trailing Edge Flaps Sling Assembly - F80213-73
J.  Flap Drive Screw Support Assembly - F80057-1
3.  Prepare for Removal
A.  Remove engine (Ref Chapter 71, Power Plant) or remove thrust reverser and tailpipe extension (Ref Chapter 78, Thrust Reverser).
B.  Remove pan from lower surface of engine-to-wing aft fairing, remove access panel from rear bulkhead of engine-to-wing aft fairing, access cover from forward overhead engine-to-wing aft fairing (Ref Chapter 54, Engine-to-Wing Fairing).
May 01/99 27-51-12 Page 401 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

G12250G12280
Inboard Trailing Edge Flap Installation  501 
27-51-12  Figure 401 (Sheet 1)  Nov 01/74 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

501  Inboard Trailing Edge Flap Installation 
May 15/78  Figure 401 (Sheet 2)  27-51-12 
Page 403 
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C.  Remove inboard flap track fairing (Ref 27-51-141 R/I).
D.  Provide system A hydraulic power (Ref 27-51-0 MP).
E.  Position flap control lever in FLAP DOWN (40-unit) detent.
F.  Remove hydraulic system A power and depressurize system (Ref 27-51-0).
4.  Remove Inboard Trailing Edge Flap
A.  Remove hinged flap (Ref 27-51-51 R/I).
B.  Remove inboard foreflap (Ref 27-51-41 R/I).
C.  Remove four bolts (11, figure 401) from each gimbal shaft yoke (12). Secure bushings to prevent them from working free.
D.  Provide system A hydraulic power (Ref 27-51-0).
E.  Position flap control lever at FLAP UP detent to retract flaps.
F.  Remove hydraulic system A power (Ref 27-51-0).
G.  Support flap so that weight of flap is off trunnions and remove four bushings (10), two from each side of gimbal shaft.
NOTE:  The mid and aft flap assembly weighs approximately 276 pounds. Make sure flap is supported before disconnecting.
H.  Support flap and push ball nut (13) away from gimbal at each end of flap. Secure ball nut to prevent rotation of nut on jackscrew. Support jackscrew using flap drive screw support assembly.
I.  Disconnect forward end of aft flap drive boom (1) from fixed structure.
J.  Remove foreflap toggle stop (5) from top of each flap track (6).
K.  Remove midflap carriage stop (7) from aft end of inboard flap track (6).
L.  Support flap and move aft to 40-unit position. Support flap in this position.
M.  Mark position relative to pin of each forward roller eccentric bushing (4). Remove forward roller
(2) from each side of midflap inboard and outboard carriages. 
　
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