757
MAINTENANCE MANUAL
Nose Gear Door Lock Release Mechanism
Figure 202
32-35-00
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MAINTENANCE MANUAL
(b)
For the nose landing gear doors, manually push forward on the sequencing control rod. Do this until the safety valve turns and the sequencing crank cam latches.
(c)
Make sure the red NOSE, L and R MAIN GEAR DOOR UNSAFE lights are off.
(d)
Look at the indicators on the safety valves and make sure the valves are in the off position.
S 862-008
WARNING: USE THE PROCEDURE IN AMM 32-00-15/201 TO INSTALL THE DOOR
_______ LOCKS. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(5) Install the door locks (AMM 32-00-15/201).
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LANDING GEAR ALTERNATE EXTENSION - ADJUSTMENT/TEST
__________________________________________________
1. General_______
A. This procedure contains the tasks that follow:
(1)
Operational test of the alternate extension system for the landing gear.
(2)
Inflight operational test of the alternate extension system.
(3)
Operational test of the ground operation of the landing gear doors.
(4)
Adjustment of the alternate extension system.
(5)
System test of the ground release of the landing gear doors.
(6)
System test of the alternate extension system.
TASK 32-35-00-715-185
2. Operational Test - Landing Gear Alternate Extension (Fig. 501A, 503, 504)___________________________________________________
A. General
(1)
This procedure does an operational check of the alternate extension system. This includes the door lock-release actuators for the nose and main landing gear. It also includes the power pack for the alternate extension system.
B.
References
(1)
AMM 06-41-00/201, Fuselage (Major Zones 100 and 200) Access Doors and Panels
(2)
AMM 24-22-00/201, Electrical Power - Control
(3)
AMM 29-11-00/201, Main (Left, Right, and Center) Hydraulic Systems
(4)
AMM 32-00-20/201, Landing Gear Downlocks
C.
Access
(1)
Location Zones
144 Main Landing Gear Wheel Well (Right)
211 Control Cabin (Left)
212 Control Cabin (Right)
711 Nose Landing Gear
731 Main Landing Gear (Left)
741 Main Landing Gear (Right)
(2)
Access Panel 198PR Door - Landing Gear Ground Control (Right)
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D. Operational Test of the Alternate Extension System
S 495-183
(1)
Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201).
S 865-182
(2)
Remove the pressure from the left and right hydraulic systems (AMM 29-11-00/201).
S 865-181
(3)
Supply electrical power (AMM 24-22-00/201).
S 715-180
(4)
Move the control lever for the landing gear to the OFF position.
S 845-179
(5)
Put an observer(s) near the nose and main landing gear areas.
S 715-178
WARNING: MAKE SURE THAT ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE AREA
_______ AROUND THE DOORS FOR THE NOSE AND MAIN LANDING GEAR. THE DOORS OPEN QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT
CAUTION: DO NOT HOLD THE "ALTN GEAR EXTENSION" SWITCH IN FOR MORE THAN
_______ TWO SECONDS. IF YOU HOLD THE SWITCH IN FOR MORE THAN SECONDS THE POWER PACK CAN BECOME TOO HOT. THE ALTERNATE EXTENSION SYSTEM WILL NOT OPERATE IF THIS OCCURS.
(6)
Push the ALTN GEAR EXTENSION switch and hold it for approximately 2 seconds.
S 715-176
(7)
The observer will make sure that these conditions occur:
(a)
The locks on the doors for the nose and main landing gear release and the doors open.
(b)
The alternate uplock-release actuator for the nose landing gear extends.
(c)
The alternate uplock-release actuators for the main landing gear extend.
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