D. Procedure
S 014-015
(1) To release the oxygen mask door so the masks will drop, do the following:
(a)
For the ASU, put a small tool into the latch access hole.
(b)
For the LSU, slide a thin card like object between the oxygen mask door and the ceiling panel over the latch.
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A 737-300/400/500MAINTENANCE MANUAL
LSU SHOWN; ASU SIMILAR
Attendant and Lavatory Service Units (ASU's and LSU's) Installation
Figure 401
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A
737-300/400/500MAINTENANCE MANUAL
S 044-018
WARNING: MAKE SURE YOU INSTALL THE RELEASE PIN OR SAFETY PIN WITH A
_______ WARNING FLAG ON THE GENERATOR. THE OXYGEN GENERATOR IS A PYROTECHNIC-ACTIVATED DEVICE. IF THE RELEASE PIN OR SAFETY PIN IS PULLED AND THE GENERATOR FIRES, THE GENERATOR GETS VERY HOT (450°F OR MORE). IF YOU TOUCH A HOT GENERATOR, YOU WILL GET AN INJURY.
(2)
Install a safety pin (Detail A) (AMM 35-22-11/201) to isolate the oxygen generator.
S 024-003
(3)
Remove the fasteners in the unit adjacent to the inboard edge.
S 024-004
(4)
Move the unit inboard and disconnect the electrical connector.
S 024-005
(5)
Remove the unit.
TASK 25-23-13-404-006
3. ASUs or LSUs Installation_________________________
A. References
(1)
AMM 35-22-11/201, Oxygen Generator
(2)
AMM 35-22-31/201, Oxygen Mask
B. Access
(1) Location Zone
100 Upper Half Fuselage
C. Procedure
S 424-007
(1)
Connect the electrical connector and put the unit into the opening in the ceiling panel.
(2)
Install the fasteners that attach the unit to the panel.
S 424-008
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A
737-300/400/500MAINTENANCE MANUAL
S 444-016
WARNING: MAKE SURE THE RELEASE PIN IS INSTALLED WITH A WARNING FLAG ON
_______ THE GENERATOR. THE OXYGEN GENERATOR IS A PYROTECHNIC-ACTIVATED DEVICE. IF THE RELEASE PIN IS PULLED AND THE GENERATOR FIRES, THE GENERATOR GETS VERY HOT (450°F OR MORE). IF YOU TOUCH A HOT GENERATOR, YOU WILL GET AN INJURY.
CAUTION:_______YOU MUST REMOVE THE SAFETY PIN. THE GENERATOR WILL NOT OPERATE IN AN EMERGENCY WITH AN INSTALLED SAFETY PIN.
(3)
Remove the safety pin to operate the oxygen generator (Detail A) (AMM 35-22-11/201).
S 434-010
(4)
Put the oxygen mask into the service unit (AMM 35-22-31/201).
D. Put the Airplane Back to its Usual Condition
S 864-012
(1) Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a) P18 Load Control Center
1) P18-3 OXYGEN SYSTEM PASS R
2) P18-3 OXYGEN SYSTEM PASS L
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A 737-300/400/500MAINTENANCE MANUAL
PASSENGER CABIN PASSENGER SERVICE UNITS (PSUs) - MAINTENANCE PRACTICES
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