Nose Cargo Door Drive Unit Installation
Figure 401 (Sheet 1)
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B26900
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747-400 MAINTENANCE MANUAL
PUSH-PULL CAM
ACTUATOR CONTACT POINT
DOOR LATCHED POSITION
Nose Cargo Door Drive Unit Installation
Figure 401 (Sheet 2)
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747-400 MAINTENANCE MANUAL
S 024-007
(3) Remove four mounting bolts and nuts and remove the drive unit (Section A-A).
NOTE: Support the drive unit while you remove the mounting bolts
____
and nuts.
TASK 52-31-03-404-008
3. Nose Cargo Door Drive Unit Installation (Fig. 401)
_______________________________________
A. Standard Tools and Equipment
(1)
Rigging Pin - ND-2, 0.311 (+0.000/-0.002)-inch diameter, 2 inches long
B.
Parts
~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT| FIG |ITEM | ................................................................................ | 401 | 1 | | | | TBD | | | 2 | | | | TBD | | | 3 | | | | TBD | | | 4 | | | | TBD | | | 5 | | | | TBD | | | 6 | | | | TBD | | | 7 | | | | TBD | | | 8 | | | | TBD | | | 9 | | | | TBD | | | 10 | | | | TBD | 2......…........…...................................….........…........….......1
C. References
(1)
24-22-00/201, Manual Control
(2)
52-31-00/201, Nose Cargo Door System
D.
Access
(1)
Location Zones
801 Nose Cargo Door
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747-400 MAINTENANCE MANUAL
E. Prepare For Installation
S 864-009
(1)
Make sure these circuit breakers are opened with the DO-NOT-CLOSE tags attached:
(a)
On the Auxilary External 2 Power Center-Right panel P715: 1) 715XX, NOSE CARGO DOOR
(b)
On the Power Distribution Center-Right panel P415: 1) 415F16, NOSE CARGO DOOR CONTROL
(c)
On the Nose Cargo Door Power panel H122:
1) 122XX, DOOR LIFT
2) 122XX, PULL UP CAM
3) 122XX, LATCHES 1-4R
4) 122XX, LATCHES 1-4L
5) 122XX, LATCHES 5-8R
6) 122XX, LATCHES 5-8L
F.
Drive Unit Installation
S 424-010
(1) Install the drive unit with four mounting bolts and nuts (Detail A).
NOTE: Support the drive unit while you install the mounting bolts
____
and nuts.
(a) Tighten nuts.
S 424-032
(2)
Connect the forward end of the drive shafts to the drive unit couplers with the bolts, washers and nuts.
S 024-033
(3)
Disconnect the aft ends of the drive shafts from the linear
actuators.
S 434-012
(4)
Connect electrical plugs on drive unit.
(5)
Supply electrical power (Ref 24-22-00/201).
S 864-014
(6)
Close these circuit breakers and attach the DO-NOT-OPEN tags:
(a)
On the Auxilary External 2 Power Center-Right panel P715: 1) 715XX, NOSE CARGO DOOR
(b) 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 舱门 DOORS 2(41)
