REGUL LO PR with Oxygen Consumption without the Use of the Oxygen Mask

TASK 35-10-00-810-802-A
REGUL LO PR with Oxygen Consumption without the Use of the Oxygen Mask

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 35-10-00-790-001	Leak Test of the Crew LP Oxygen-System
AMM 35-12-41-000-001	Removal of the Oxygen-Mask Stowage-Box
AMM 35-12-41-400-001	Installation of the Oxygen-Mask Stowage-Box
AMM 35-13-14-000-001	Removal of the Low-Pressure Oxygen Pressure-Switch
AMM 35-13-14-000-802	Removal of the Low-Pressure Oxygen Pressure-Switches
AMM 35-13-14-400-001	Installation of the Low-Pressure Oxygen Pressure-Switch
AMM 35-13-14-400-802	Installation of the Low-Pressure Oxygen Pressure-Switches
AMM 35-13-15-000-001	Removal of the Oxygen Pressure Regulator/Transmitter
AMM 35-13-15-000-802	Removal of the Oxygen Pressure Regulator/Transmitters
AMM 35-13-15-400-001	Installation of the Oxygen Pressure Regulator/Transmitter
AMM 35-13-15-400-802	Installation of the Oxygen Pressure Regulator/Transmitters
AMM 35-13-41-000-802	Removal of the Oxygen-System Test Ports
AMM 35-13-41-400-802	Installation of the Oxygen-System Test Ports
AMM 35-13-51-000-001	Removal of the Low-Pressure Oxygen-Supply Solenoid-Valve
AMM 35-13-51-000-802	Removal of the Low-Pressure Oxygen-Supply Solenoid-Valves
AMM 35-13-51-400-001	Installation of the Low-Pressure Oxygen-Supply Solenoid-Valve
AMM 35-13-51-400-802	Installation of the Low-Pressure Oxygen-Supply Solenoid-Valves

3. Fault Confirmation
Subtask 35-10-00-700-050-A

A. Test
(1) Do the leak test of the crew LP oxygen-system AMM 35-10-00-790-001.

4. Fault Isolation
Subtask 35-10-00-810-051-B ** ON A/C NOT FOR ALL

A. If the pressure decreases during the leakage test

replace the defective component: STOWAGE BOX-OXY MASK, CAPT [10RN1] or STOWAGE BOX-OXY MASK, F/O [10RN2] or STOWAGE BOX-OXY MASK, 3RD OCCPNT [10RN3] or STOWAGE BOX-OXY MASK, 4TH OCCPNT [5774HM] AMM 35-12-41-000-001 and AMM 35-12-41-400-001 or HOSE-STOWAGE BOX [5764HM] or HOSE-STOWAGE BOX [5765HM] or HOSE-STOWAGE BOX [5766HM] or HOSE-STOWAGE BOX [5768HM] or MANIFOLD-OXY DISTRIBUTION [5753HM] or TEST PORT-OXY SYS [5755HM] or HOSE-OXY SPLY [5763HM] or XMTR/PRESS REG-OXY [4HT]
AMM 35-13-15-000-001 and AMM 35-13-15-400-001 or SOL VALVE-LP OXY SPLY [3HT] AMM 35-13-51-000-001 and AMM 35-13-51-400-001 or PRESS SW-OXYGEN LO PR [4WV] AMM 35-13-14-000-001 and AMM 35-13-14-400-001.

Subtask 35-10-00-810-051-C ** ON A/C NOT FOR ALL

A. If the pressure of the Captain LP oxygen-system decreases during the leak test:
(1) Replace the defective component:

STOWAGE BOX-OXY MASK, CAPT [10RN1] or STOWAGE BOX-OXY MASK, 3RD OCCPNT [10RN3] AMM 35-12-41-000-001 and AMM 35-12-41-400-001, or
HOSE-STOWAGE BOX [5764HM] or HOSE-STOWAGE BOX [5766HM] , or
MANIFOLD DISTRIBUTION [5753HM1] , or
PORT.ASSY TEST [5755HM1] AMM 35-13-41-000-802 and AMM 35-13-41-400-802, or
XMTR/PRESS REG-OXY [4HT] or its(their) flexible hose(s) 5762HM1 or 5763HM1 AMM 35-13-15-000-802 and AMM 35-13-15-400-802, or
LP SOLENOID SUPPLY VALVE [3HT1] AMM 35-13-51-000-802 and AMM 35-13-51-400-802, or
PRESSURE SWITCH [4WV1] AMM 35-13-14-000-802 and AMM 35-13-14-400-802.

Subtask 35-10-00-810-087-A ** ON A/C NOT FOR ALL

B. If the pressure of the First-Officer LP oxygen-system decreases during the leak test:
(1) Replace the defective component:

STOWAGE BOX-OXY MASK, F/O [10RN2] or STOWAGE BOX-OXY MASK, 4TH OCCPNT [5774HM] AMM 35-12-41-000-001 and AMM 35-12-41-400-001, or
HOSE-STOWAGE BOX [5765HM] or HOSE-STOWAGE BOX [5768HM] , or
MANIFOLD DISTRIBUTION [5753HM2] , or
PORT.ASSY TEST [5755HM2] AMM 35-13-41-000-802 and AMM 35-13-41-400-802, or
PRESS.TRANSM.REGULATO [4HT2] or its(their) flexible hose(s) 5762HM2 or 5763HM2 AMM 35-13-15-000-802 and AMM 35-13-15-400-802, or
LP SOLENOID SUPPLY VALVE [3HT2] AMM 35-13-51-000-802 and AMM 35-13-51-400-802, or
PRESSURE SWITCH [4WV2] AMM 35-13-14-000-802 and AMM 35-13-14-400-802.

Subtask 35-10-00-700-051-A

C. Do the test given in Para. 3.A.

[Rev.8 from Aug 2018] 2026.04.04 04:33:35 UTC