(2)
Storage box installation.
(3)
Mask/regulator removal.
(4)
Mask/regulator installation.
(5)
Demand regulator removal.
(6)
Demand regulator installation.
C. The removal/installation procedures are for a single mask/regulator/stowage box. The procedures can be used at all crew stations with mask stowage boxes.
D. A mask storage box is installed at the Captain's and the First Officer's station. You can get access to the stowage box through the flight compartment.
E. Each storage box contains a microphone with the electrical connector identified with a label as follows:
(1)
D6049 electrical connector on the captain's storage box.
(2)
D6051 electrical connector on the first officer's storage box.
TASK 35-12-86-004-001
2. Storage Box Removal
___________________
A. General
(1) Read and obey the safety precautions of the oxygen system and the general maintenance instructions before you do the maintenance (AMM 35-00-00/201).
B. Standard Tools and Equipment
(1) Caps or Plugs - Package of Clean Protective
C. References
(1)
AMM 35-00-00/201, Oxygen
(2)
AIPC 35-10-00 Fig. 2
(3)
WDM 23-51-01, 23-51-02, 23-51-03
D. Access
(1) Location Zones
101 Control Cabin (Left)
102 Control Cabin (Right)
E. Procedure
S 864-002
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a) On the main power distribution panel, P6:
1) C018 or C020, INPH AND WARN, or SERVICE INPH, or OBS INPH
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A 737-300/400/500MAINTENANCE MANUAL
2) 3) 4) B021, CAPT AND AUDIO, or CAPT AUDIO, or CAPT AND OBS-INPHB020, F/0 AUDIO, or F/O AND E/R INPH, or F/O INPHC019, or C021 OBS AUDIO, or FLT INPH AMPL or INPH AMPL or TRAINING INPH
(2) S 844-003Release the oxygen from the crew oxygen system (depressurize).
CAUTION:_______ DO NOT TIGHTEN THE VALVE MORE THAN THE GIVEN TORQUE. DAMAGE TO THE VALVE CAN OCCUR.
(a) Close the shutoff valve on the crew oxygen cylinder by hand.
NOTE:____ When you tighten the valve by hand this is equivalent to a maximum torque of 25 pound-inches.
(b) (c) Set one of the oxygen mask/regulators of the crew system to 100 percent emergency oxygen.Move the test lever of the sliding control on the mask storage box to bleed the oxygen lines.
(3) S 024-004To remove the storage box, do the steps that follow: (a) Loosen the four fasteners that attach the storage box to the structure. (b) Remove the storage box.
WARNING:_______ YOU MUST LOOSEN THE FITTINGS AND CONNECTIONS SLOWLY. THE REMAINING PRESSURE IN THE LINES CAN COME OUT AT HIGH TEMPERATURES AND CAN CAUSE A FIRE OR AN EXPLOSION. INJURY TO PERSONS AND DAMAGE TO THE EQUIPMENT CAN OCCUR.
(c) Loosen the fitting connections slowly, use a back-up wrench to make sure the fitting does not turn.
(4) S 034-005Disconnect the microphone connector from the storage box.
(5) S 434-006You must use clean metal caps when the cap threads engage the connector threads easily.
(6) S 434-007You must use new plastic caps when metal cap threads do not engage the connector threads.
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