G13049
500  Inboard Foreflap Wear Limits 
Aug 15/73  Figure 601 (Sheet 1)  27-51-41 
Page 601 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

INDEX NO.  PART NAME  DIM.  DESIGN LIMITS  WEAR LIMITS  REPLACE WORN PART  REPAIR WORN PART  REPAIR INSTR. 
DIAMETER  MAX WEAR DIM.  MAX DIAM CLEAR ANCE 
MIN  MAX 
1  BUSHING  ID  0.5030  0.5040  0.5085  0.0072  X 
BUSHING  OD  0.5006  0.5013  0.4958  X 
2  BUSHING  ID  0.3750  0.3765  0.3800  0.0050  X 
BEARING  OD  0.3740  0.3750  0.3700  X 
3  BUSHING  ID  0.3750  0.3765  0.3800  0.0050  X 
BEARING  OD  0.3740  0.3750  0.3700  X 
4  BUSHING  ID  0.3750  0.3765  0.3800  0.0050  X 
BEARING  OD  0.3740  0.3750  0.3700  X 

Inboard Foreflap Wear Limits  500 
27-51-41  Figure 601 (Sheet 2)  Aug 15/73 
Page 602 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

HINGED FLAPS - REMOVAL/INSTALLATION
1.  General
A.  This procedure applies to both inboard and outboard hinged flaps.
2.  Equipment and Materials
A.  Primer - BMS 10-11, type 1 (Ref 20-30-41)
3.  Prepare for Removal
A.  Provide system A hydraulic power (Ref 27-51-0, Maintenance Practices).
B.  Position flap control lever in FLAP DOWN (40-unit) detent.
C.  Remove system A hydraulic power (Ref 27-51-0).
4.  Remove Hinged Flap
A.  Remove four screws and remove lower aft seals and retainers from flap. (Section A-A, Fig. 401).
B.  On outboard hinged flap, remove two screws and retainer attaching upper seal to upper housing (Detail A, Fig. 401).
C.  Remove bolts connecting carriage in engine-to-wing aft fairing track to flap actuator support.
NOTE: Support trailing edge of hinged flap to prevent dropping when bolts are removed.
D. Support flap and remove four bolts connecting upper housing to hinged flap (Section B-B).
NOTE: Bearings and seals may drop to ground unless supported manually.
E.  Remove hinged flap from airplane.
5.   Install Hinged Flap
A.  Install wiper seals and bearings in flap upper and lower housings.
B.  Position flap upper and lower housings on torque tube and install four bolts (Section B-B, Fig. 401). Dip bolts in primer and install while wet.
C.  Move carriage in engine-to-wing aft fairing track until it is adjacent to flap actuator support.
506 
Aug 15/77  BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.  27-51-51 Page 401 

G13061G13078
Hinged Flap Installation  500 
27-51-51  Figure 401 (Sheet 1)  May 20/82 
Page 402 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

501  Hinged Flap Installation 
Feb 15/79  Figure 401 (Sheet 2)  27-51-51 
Page 403 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

D.  Align holes in carriage with holes in actuator and install bolts with washer under head, countersunk side toward head. Install nuts and temporarily tighten finger-tight (section A-A).
E.  On outboard hinged flap, install seal retainer and two screws attaching upper seal to upper housing (Detail A, Fig. 401).
F.  Provide system A hydraulic power (Ref 27-51-0).
G.  Raise flaps to FLAP UP position.
H.  Remove system A hydraulic power (Ref 27-51-0).
I.  Align trailing edge of hinged flap with trailing edge of aft flap within + 0.10 inch. Check that bearing support housing does not protrude above midflap surface on outboard flap. Tighten nuts connecting carriage and flap support to 65-90 pound-inches
J.  Adjust rub block on inboard or outboard midflap to fixed rub block on hinged flap to gap specified in detail B. On outboard flap, maintain a minimum of 0.010 inch clearance between hinged flap an d midflap throughout full travel.
K.  Install aft lower seal and retainers on flap (section A-A).
L.  Adjust blade seals on hinged flap per section A-A.
M.  Provide system A hydraulic power (Ref 27-51-0).
N.  Cycle flaps ending with flaps up.
　
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