(c)
Airplane in Ground position, move the sensor on the mounting bracket forward and aft until you get the correct clearance as shown on Fig. 501 (between the sensor face and the target).
(d)
Tighten the mounting bolts.
S 715-013
(3)
Do a check of the sensor operation:
(a)
Supply electrical power (Ref 24-22-00/201).
(b)
Make sure all the circuit breakers for the landing gear system are closed on the P6 panel.
(c)
Make sure the test lights for AIR and GROUND SENSING on the E-11 shelf are off.
(d)
Put a deactuator between the ground safety sensor and its target.
(e)
Make sure the GROUND SENSING light on the E11 shelf comes on.
(f)
Remove the deactuator.
S 865-014
(4) Remove electrical power, if it is not necessary (AMM 24-22-00/201).
TASK 32-09-01-725-015
3. Main Landing Gear Safety Sensors - Test
_______________________________________
A. Special Tools and Equipment
(1)
Airplane Jacks (AMM 07-11-11/201)
(2)
Axle Jack (for the right main gear) (AMM 07-11-11/201)
(3)
Ground Locks - F72735 (AMM 32-00-01/201)
B.
References
(1)
AMM 07-11-11/201, Jack Airplane
(2)
AMM 07-11-31/201, Jack Airplane Axles
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A
737-300/400/500MAINTENANCE MANUAL
(3)
AMM 12-15-31/301, Main Gear Shock Strut
(4)
AMM 24-22-00/201, Manual Control
(5)
AMM 29-15-00/201, Hydraulic System A, B, and Standby
(6)
AMM 32-00-01/201, Ground Locks
C.
Prepare for the Test
S 495-016
(1)
Make sure the ground lockpins are installed all the landing gear (AMM 32-00-01/201).
S 865-017
(2)
Make sure the hydraulic pressure is removed from all the hydraulic systems (AMM 29-15-00/201).
S 865-018
(3)
Supply electrical power (AMM 24-22-00/201).
S 585-019
(4)
Lift the airplane with the jacks until the tires are clear of the ground (AMM 07-11-11/201).
S 865-020
(5)
Make sure all circuit breakers for the landing gear system on the P6-2 panel are closed.
S 035-021
(6)
Remove the pressure from the shock strut for the right main gear:
WARNING: DO NOT LOOSEN THE VALVE BODY UNLESS THE SHOCK STRUT IS
_______ FULLY DEFLATED. AIR PRESSURE CAN BLOW THE VALVE BODY OUT, AND CAUSE INJURY TO PERSONS.
(a)
Remove the valve cap from the charging valve.
(b)
Loosen the air release nut, one or two turns, to deflate the shock strut.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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737-300/400/500MAINTENANCE MANUAL
D. Test of the Safety Sensors (Fig. 501)
S 865-022
(1)
Put the control lever for the landing gear in the DN position.
S 495-023
(2)
Put the axle jack below the right main gear.
S 725-024
(3)
Slowly compress the shock strut with the axle jack until the AIR SENSING light on the E-11 shelf goes off.
NOTE: It will be necessary to measure the distance that you
____ compress the shock strut from the fully extended position.
(a)
Make sure the GROUND SENSING light on the E-11 shelf stays on.
(b)
Try to move the control lever for the landing gear to the UP position.
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