27-81-02
 ALL  ú ú 01 Page 412 ú Feb 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
 ~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 33 | Washer (Under Head) | 27-81-02 | 10 | 395 | | | 33 | Washer (Under Nut) | | | 400 | | | 34 | Nut | | | 405 | | | 35 | Bushing | | | 410 | | | 36 | Screw (On Nose) | | | 45 | | | 36 | Screw (On Flap) | | | 50 | | | 37 | Washer (Under Nut) | | | 55 | | | 37 | Washer (Both Sides of Jumper) | | | 60 | | | 38 | Jumper | | | 40 | | | 39 | Nut | | | 65 | | | 40 | Bolt | | | 440 | | | 41 | Washer (Under Head) | | | 445 | | | 41 | Washer (Under Nut) | | | 450 | | | 42 | Bushing | | | 460 | | | 43 | Nut | | | 455 | | | 44 | Bolt | | | 320 | | | 45 | Washer | | | 325 | | | 46 | Nut | | | 330 | | | 48 | Bolt | | | 195 | | | 49 | Washer (Under Head) | | | 200 | | | 49 | Washer (Under Nut) | | | 205 | | | 50 | Bushing | | | 215 | | | 51 | Nut | | | 210 | | | 52 | Bolt | | | 320 | | | 53 | Washer | | | 325 | | | 54 | Nut | | | 330 | | | 55 | Pad | 57-21-65 | 05 | 10 | | | 55 | Pad | | 01 | 10 | | | 55 | Pad | 57-21-64 | 05 | 10 | | | 56 | Screw | 57-55-51 | 10 | 115 | | | 57 | Nut | 57-55-00 | 01 | 120 | | | 58 | Screw | | | 110 | | | 59 | Bolt | 27-81-02 | 10 | 471 | | | 60 | Washer | | | 471B | | | 61 | Hinge | | | 482 | | | 62 | Folding Nose | | | 470 | 2......…........…...................................…...........….....…........1
 C. References
 (1)
AMM 27-81-00/201, Leading Edge Flap System

 (2)
AMM 27-81-02/601, Variable Camber Flap

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 27-81-02
 ALL  ú ú 03 Page 413 ú Jun 18/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
FLAP NO. 6 (LEFT) FLAP NO. 8 (LEFT) FLAP NO. 10 (LEFT) NO. 21 (RIGHT) NO. 19 (RIGHT) NO. 17 (RIGHT)

FLAP CAVITY AFT SEAL
TOP VIEW
(4 LOCATIONS)

FLAP NO. 1E (LEFT) FLAP NO. 2 (LEFT) FLAP NO. 4 (LEFT) NO. 26E (RIGHT) NO. 25 (RIGHT) NO. 23 (RIGHT)

FLAP CAVITY AFT SEAL

TOP VIEW
(5 LOCATIONS) 4

THE DIFFERENCE BETWEEN THE ADJACENT FLAPS ANDBETWEEN THE FLAPS AND THE ADJACENT STRUCTURE WITH THE FLAPS RETRACTED AND LOAD FROM THE ACTUATOR MUST NOT BE LARGER THAN: FORWARD FACING MISMATCH:
 0.04 INCH FOR 75% OF SEAL LENGTH
 0.06 INCH FOR 25% OF SEAL LENGTH
AFT FACING MISMATCH:
 0.04 INCH FOR 75% OF SEAL LENGTH
 0.09 INCH FOR 25% OF SEAL LENGTH
NOTE:  MISMATCH MEASUREMENTS ARE TAKEN WITH EROSION SHIELD MOLDINGS BONDED IN THE FLAP ASSEMBLY.
ADJUST THE SEAL TO GET A SMOOTH
TOTAL SEAL DEPRESSION AS SHOWN

MEASURE THE PROFILE IN LINE WITH THE ACTUATING LINKAGE AT A POINT 3.0 INCHES AFT OF THE FLAP LEADING EDGE. THE FLAP PROFILE MUST BE AS FOLLOWS (WITH A NEGATIVE PROFILE, THE FLAP BENDS IN AS SHOWN):
+0.01 TO -0.05 INCH (FLAPS NO. 1E THRU 9,
18 THRU 26E)
+0.05 TO -0.05 INCH (FLAPS NO. 10 AND 17)

THE FLAP CAVITY SEALS ARE NOT INSTALLED ON THE WING STRUCTURE AFT OF THE FLAP PANELS NO. 5, 7, 20 AND 22.
DIFFERENCE BETWEEN THE FLAP AND THE STRUCTURE AT THE LEADING EDGE OF THE FLAP WITH THE FLAPS RETRACTED AND LOAD FROM THE ACTUATOR MUST NOT BE LARGER THAN:
0.02 INCH FOR 75% OF SEAL LENGTH
 0.04 INCH FOR 25% OF SEAL LENGTH
ADJUST SEAL TO GET PERMITTED CLEARANCE WITH FLAP RETRACTED.
Variable Camber Flaps Clearance and Mismatch Requirements
Figure 402 (Sheet 1)

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 27-81-02
 ALL  ú ú 01 Page 414 ú Oct 18/00
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747-400 MAINTENANCE MANUAL
FLAP TO NACELLE CLEARANCE
　
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