S 865-007
(6)
Open the following circuit breakers:
(a)
P6 Main Power Distribution Panel
1) 6C28 ALT LG EXT NOSE
2) 6C29 ALT LG EXT WING L
3) 6C30 ALT LG EXT WING R
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4) 6C31 ALT LG EXT BODY L
5) 6C32 ALT LG EXT BODY R
S 865-008
(7)
Close the 7F22 LANDING GEAR DSP & CONT PRI circuit breaker on the P7 Overhead Circuit Breaker Panel.
S 865-009
(8)
Close the 7F23 LANDING GEAR DSP & CONT ALTN circuit breaker on the P7 Overhead Circuit Breaker Panel.
S 985-010
(9)
Manually place the left (right) wing gear uplock hook in the locked up position.
S 095-011
WARNING:_______REFER TO AMM 32-00-30/201 FOR LOCK REMOVAL PROCEDURE. RAPID ACTION OF DOORS MAY INJURE PERSONNEL OR DAMAGE EQUIPMENT.
(10) Do this task: "Nose Landing Gear Door Lock Removal"
(AMM 32-00-30/201).
S 865-012
WARNING: MAKE SURE THAT ALL PERSONNEL ARE CLEAR OF THE DOOR
_______ OPERATING PATH. RAPID ACTION OF THE DOORS MAY INJURE PERSONNEL OR DAMAGE EQUIPMENT.
(11)
Move the ground door release handle to the "Doors Closed" position.
S 865-013
(12)
Release the pressure from hydraulic systems No. 1 and No. 4
(AMM 29-11-00/201).
S 865-014
(13)
Place the landing gear control handle in the OFF position.
S 865-015
(14)
If doing the left wing gear uplock release mechanism test, close the 6C29 ALT LG EXT WING L circuit breaker on the P6 Main Power Distribution Panel.
S 865-016
(15)
If doing the right wing gear uplock release mechanism test, close the 6C30 ALT LG EXT WING R circuit breaker on the P6 Main Power Distribution Panel.
F.
Test Wing Gear Uplock Release Mechanism (Fig. 501)
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SEE A
SEE B
A
LANDING GEAR ALTERNATE EXTENSION UPLOCK RELEASE MECHANISM (SUPPORT ASSEMBLY NOT SHOWN)
ELECTRICAL ACTUATOR
OUTBD
LEFT-HAND SHOWN FWD RIGHT-HAND OPPOSITE
WING GEAR MECHANISM
B
Wing Gear Alternate Extension System
Figure 501
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S 865-048
WARNING:_______ MAKE SURE THAT ALL PERSONNEL ARE CLEAR OF THE DOOR OPERATING
PATH. RAPID ACTION OF THE DOORS MAY INJURE PERSONNEL OR DAMAGE
EQUIPMENT.
CAUTION: THE ALTERNATE EXTENSION SWITCH MUST BE LEFT IN THE "ON"
_______ POSITION FOR A MINIMUM OF 90 SECONDS. FAILURE TO DO SO WILL CAUSE MALFUNCTIONS DURING LANDING GEAR RETRACTION OR LANDING GEAR DOOR CLOSURE.
(1)
Set the wing gear alternate extension switch on the P2-3 landing gear control panel to the "ON" (extend) position.
(a)
The switch face will display "ALTN".
S 715-018
(2)
Make sure that the left (right) wing gear door unlocks and falls open.
S 715-019
(3)
Make sure that left (right) alternate extension rotary actuator on the uplock release mechanism completes its full cycle.
S 715-020
(4) 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 起落架 LANDING GEAR 6(5)
