(5)
Put a REVERSER INOP tag on the reverse thrust lever.
(6)
Put a REVERSER INOP tag on the REVERSER UNLOCKED light.
J. Reinstall actuator housing fairings (if removed) per step F.
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May 01/03 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 78-32-01 Page 205
THRUST REVERSER SYSTEM - ADJUSTMENT/TEST
1. Thrust Reverser System Adjustment
A. General
(1)
The only adjustments (rigging) normally required when installing a thrust reverser, is a check of the thrust reverser push-pull control cable rigging, and a check of the deflector door fairing step and gap limits. Components of the thrust reverser assembly requiring rigging (deflector doors and linkage) are normally rigged during buildup of the thrust reverser assembly prior to installation of the assembly on the airplane. If rigging of any of these components is required, perform rigging according to instructions in the respective component maintenance practices.
(2)
Rigging of the thrust reverser controls other than the follow-up controls is accomplished by rigging the engine controls. For rigging of the follow-up controls and the thrust reverser push-pull cable, refer to 78-34-32.
(3)
Adjustment of the reverse thrust detent is required under the following conditions; after replacing an engine fuel control unit, after changing an engine and after adjustment of any engine control system.
2. Thrust Reverser System Test
A. General
(1)
A functional test of the thrust reverser and controls operation is performed using the system B electric motor-driven pumps to provide the actuating force. Thrust reverser actuation is also checked using the thrust reverser alternate hydraulic pressure source.
(2)
The thrust reverser system test consists of a system indication test, a circuit check, and a thrust reverser operational test. The landing gear air-ground sensing system, fire switch, and pressure line check valve operation are also tested.
WARNING: BEFORE OPERATING THRUST REVERSERS, ENSURE THAT ADEQUATE STEPS ARE TAKEN TO PREVENT INJURY TO PERSONNEL OR DAMAGE TO EQUIPMENT.
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B. Equipment and Materials
(1)
Source of 28-volt dc power at battery bus and dc bus No. 1 and 2
(2)
Stopwatch
(3)
Thrust Reverser Isolation Valve Ground Lock Cap and Pin Assembly - F80109-3 or F80109-9
C. Prepare for Test
(1)
Deleted.
(2)
Check that ground locks are removed from both thrust reverser isolation valves (Fig. 501).
(3)
Check that battery bus, dc bus No. 1, and bus No. 2 are energized.
(4)
Deleted.
(5)
Check that both engines are shut down.
(6)
Check that landing gear selector lever is in the DOWN position.
(7)
On airplanes with nose gear air-ground switch, check that nose and main landing gear oleo struts are compressed. On airplanes without nose gear air-ground switch, check that main landing gear struts are compressed.
(8)
Check that both forward thrust levers are in the IDLE STOP position.
(9)
Check that both reverse thrust levers are in the OFF position.
(10)
Check that both fire switches on the P8 panel are closed.
(11)
Deleted.
(12)
Pressurize A and B hydraulic systems using the B electric motor-driven pumps
(Ref 29-11-0, Maintenance Practices).
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78-32-01 Page 502 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. May 01/03
F40994
500 Thrust Reverser Isolation Valve
Feb 15/70 Figure 501 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 78-32-01 Page 503
(13) Check that the following circuit breakers on circuit breaker panel P6 are closed:
(a)
ENG 1 THRUST REVERSER
(b)
ENG 2 THRUST REVERSER
(c)
MASTER CAUTION (2 places)
(d)
DIM AND TEST
(e)
INDICATOR (9 places)
D. Test Thrust Reverser System
(1) Move both thrust reverser override switches on the P5 panel to OVERRIDE for 10 seconds, and then return both switches to NORMAL.
(a)
Both thrust reversers shall be stowed (forward thrust position).
(b)
The following lights shall remain off:
1) Deleted
2) Both MASTER CAUTION lights
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