S 415-099
(4)
Close the fan cowl panels (AMM 71-11-04/201).
S 865-100
(5)
Remove the electrical power if it is not necessary
(AMM 24-22-00/201).
TASK 36-11-05-705-038
8. Reverse Flow Check Protection - Operational Test (Fig. 504)________________________________________________
A. General
(1)
This procedure examines the operation of the reverse flow check mechanism that is located within the high-stage regulator unit. The flow check mechanism is designed to shut off the high-stage valve to prevent a flow reversal.
(2)
The reverse flow check mechanism is designed to vent the opening chamber of the high-stage valve which causes it to close in the event of a reverse flow condition.
B. Equipment
(1)
Nitrogen Source
(2)
Pressure Gage, 0-200 PSIG (2 required)
(3)
Control Pressure Gage - 0-60 psig
(4)
Pressure Regulator (2 required)
(5)
Union Fitting - MS-6 (2 required)
(6)
Test Line Hoses
(7)
Tee (1 required)
C. Consumable Materials
(1) D00010 Antiseize Compound, commercially available
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
D.
E.
F.
A
737-300/400/500MAINTENANCE MANUAL
References
(1)
AMM 36-05-00/201, Pneumatic System
(2)
AMM 71-11-02/201, Fan Cowl Panels
(3)
AMM 78-31-00/201, Thrust Reverser SystemAccess
(1)
Location Zones 502/503 Fan Cowls - Left Nacelle 504/505 Thrust Reverser - Left Nacelle 602/603 Fan Cowls - Right Nacelle 604/605 Thrust Reverser - Right Nacelle
(2)
Access Panels 5737/5837 Fan Cowl Assembly 5738/5838 Thrust Reverser Cowl Assembly 5739/5839 Thrust Reverser Cowl Assembly 5746/5846 Fan Cowl Assembly
Prepare for the Operational Test
S 865-170
(1)
Make sure the applicable engine is not in operation.
S 865-077
(2)
Put the forward thrust lever in the fully rearward position and attach a DO-NOT-OPERATE tag.
S 865-030
(3)
Put the start lever in the CUTOFF position and attach a DO-NOT-OPERATE tag.
S 865-167
(4)
Remove the pressure from the pneumatic system (AMM 36-05-00/201).
S 865-079
(5)
Open the BLEED AIR circuit breaker on the P6 panel and attach a DO-NOT-CLOSE tag.
(6)
Put a DO-NOT-OPERATE tag on the BLEED switch at the P5-10 panel.
S 865-080
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 865-035
WARNING:_______ DO THE DEACTIVATION PROCEDURE TO PREVENT THE OPERATION OF THE
PREVENT THE OPERATION OF THE THRUST REVERSER. ACCIDENTAL
OPERATION OF THE THRUST REVERSER CAN CAUSE INJURIES TO PERSONS
OR DAMAGE TO EQUIPMENT.
(7)
Do the deactivation procedure for the thrust reverser for ground maintenance (AMM 78-31-00/201).
S 015-036
(8)
Open the fan cowl panels (AMM 71-11-02/201).
S 015-037
WARNING: OBEY THE INSTRUCTIONS IN THE PROCEDURE TO OPEN THE THRUST
_______ REVERSERS. IF YOU DO NOT OBEY THE INSTRUCTIONS, INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT CAN OCCUR.
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