(2)
Use the procedures in the Air/Ground Relay System (Ref 32-09-02) to do a test of the truck tilt proximity sensors for the main landing gear and the proximity sensors for nose landing gear compressed.
(3)
You do not need to retract the landing gear to do this test. Proximity sensor actuators and deactuators are used to change the landing gear position.
(4)
The position indication and warning system has two parallel logic systems. A test of system 1 is done first, with system 2 isolated, then a test of system 2 is done with system 1 isolated.
(5)
Proximity sensors, actuators and deactuators are used to change the indications.
(6)
The actuators are put adjacent to the face of the sensor to operate the proximity sensors. The maximum gaps for operation are 0.125 inches for rectangular sensors and 0.075 inch for round sensors. The actuator can touch the surface of the sensors.
(7)
The deactuators are put between the sensor face and the target to give a target far condition. The deactuator can touch either the sensor or the target or both.
B.
Equipment
(1)
Proximity Sensor Actuator/Deactuator Set - A27092-84 (6 cylindrical sensor deactuators, 2 rectangular sensor deactuators, 3 rectangular sensor actuators and 2 cylindrical sensor actuators required.)
C.
References
(1)
AMM 24-22-00/201, Electrical Power - Control
(2)
AMM 29-11-00/201, Pressurize/Depressurize Main Hydraulic System
(3)
AMM 32-00-15/201, Landing Gear Door Locks
(4)
AMM 32-00-20/201, Landing Gear Downlocks
(5)
AMM 32-09-02/201, Air/Ground Relays
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D. Access
(1)
Location Zones
115 NLG Wheel Well (Left)
116 NLG Whell Well (Right)
143 MLG Wheel Well (Left)
144 MLG Wheel Well (Right)
211 Control Cabin (Left)
212 Control Cabin (Right)
710 Nose Landing Gear and Doors
730 Main Landing Gear and Doors (Left)
740 Main Landing Gear and Doors (Right)
E.
Prepare For the System Test
S 865-002
(1) Make sure the downlocks are installed on the nose and main landing gear (AMM 32-00-20/201) and the chocks are put on the wheels.
S 865-003
WARNING:_______USE THE PROCEDURE AMM 32-00-15/201 TO INSTALL THE DOOR. THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2) Open the doors for the landing gear and install the door locks (AMM 32-00-15/201).
NOTE: The nose and main landing gear doors open at the same time by
____
the ground release.
S 045-190
WARNING: PREPARE THE SAFETY-SENSITIVE SYSTEMS FOR THE AIR MODE BEFORE
_______ YOU OPEN THE AIR/GROUND CIRCUIT BREAKERS. IN THE AIR MODE, MANY OF THE AIRPLANE SYSTEMS CAN OPERATE AND CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(3)
Prepare the safety-sensitive systems for air mode simulation (AMM 32-09-02/201).
S 865-006
(4)
Make sure the control lever for the landing gear on the main instrument panel P3 is in the DN position.
S 865-004
(5)
Remove the pressure from the left hydraulic system
(AMM 29-11-00/201).
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S 865-007
(6)
Make sure these circuit breakers on the overhead circuit breaker panel P11 are closed:
(a)
11A35, IND LTS 4
(b)
11C19, LANDING GEAR POS SYS 2 ALTN
(c)
11C30, LANDING (or LDG) GEAR POS SYS 1
(d)
11J2, EICAS CMPTR LEFT (or L)
(e)
11J3, EICAS UPPER DISPLAY (or IND)
(f)
11J29, EICAS CMPTR RIGHT (or R)
(g)
11J30, EICAS LOWER DISPLAY (or IND)
(h)
11J31, EICAS DISPLAY (or DSPL) SW
(i)
11J32, EICAS DISPLAY (or DSP) SELECT
(j)
11P28, R IND LTS 1
(k)
11S23, LANDING GEAR POS SYS 2
S 865-008
(7)
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本文链接地址：757 AMM 飞机维护手册 起落架 CHAPTER 32 - LANDING GEAR 3(146)
