STUD AND CLIP
SPRING LOADED
PRESSURE RELIEF DOOR
PRESSURE RELIEF DOOR
(EXAMPLE FAIRING)
(EXAMPLE FAIRING)
HINGE (EXAMPLE) E-E
Nacelle Strut Access Door - Adjustment/Test
Figure 501 (Sheet 7)
G20596
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
54-62-02
ALL ú ú 02 Page 509 ú Feb 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 945-083
(2) Attach the pivot support assembly and torque wrench to the adapter
assembly.
S 725-085
(3) With the torque wrench handle parallel to door edge, turn the handle
until the latch releases, and note in writing the torque applied.
S 225-086
(4) Compare the written torque value with the requirements of
the latch (50 to 65 pounds).
NOTE:____ The adapter tool assembly increases torque applied to
the latch by a factor of two (2x). To calculate the
torque applied, multiply the torque wrench value by 2.0.
S 905-095
CAUTION: YOU MUST REPLACE OR REPAIR ALL DOOR LATCHES THAT
_______ DO NOT RELEASE CORRECTLY. TOO MUCH FORCE ON THE LATCH CAN CAUSE DAMAGE TO THE DOORS.
(5)
If the release load is not within limits, replace the latch or replace the door.
S 035-091
(6)
To replace the latch, do these steps:
S 035-088
(7)
Remove the bolts, washers and nuts that attach the latch, wear plate and shim pack to the door.
S 425-089
(8)
Put the replacement latch, shims and wear plate on the door sill.
(a)
Make sure the finished side of the wear plate is against the shims.
(b)
Install the bolts, washers and nuts.
(c)
Do a release check of the repaired door assembly.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
54-62-02
ALL ú ú 01 Page 510 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(d) Trim the lower hinge arm, if necessary to insure a minimum 0.20 inch clearance between hinge and diagonal brace with the door closed (Figure 501, Sh. 7).
S 865-090
(9) If the load is within limits, close the door (AMM 54-62-00/201).
E. Do the latch load test with a Torque Adapter (Alternative).
S 945-028
(1)
Assemble the torque adapter tool and torque wrench (Fig. 501 Sh. 5).
S 725-029
(2)
Put the torque adapter tool into the latch opening slot.
S 725-031
(3)
Turn the torque wrench to find the torque that is necessary to release the latch.
S 725-032
(4)
Remove the torque adapter tool.
S 725-033
(5)
Measure the distance Lw. Calculate the correct torque values for the necessary release load (Fig. 501).
S 725-034
(6)
Compare the calculated torque with the required torque range.
S 905-035
CAUTION: YOU MUST REPLACE OR REPAIR ALL DOOR LATCHES THAT DO NOT
_______
RELEASE CORRECTLY. TOO MUCH FORCE ON THE LATCH CAN
CAUSE DAMAGE TO THE DOORS.
(7) If release load is not within limits, replace the door (if latch is secured by hi-lok bolts and collars), or replace the latch as follows (if latch is secured by bolts, nuts, and washers):
(a) Remove the bolts, nuts, and washers that attach the latch, wear plate, and shim pack to doorsill.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
54-62-02
ALL ú ú 01 Page 511 ú Feb 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：747-400 AMM 飞机维护手册 NACELLES/PYLONS(95)
