(2)
AMM 35-00-00/201, Oxygen
(3)
AMM 35-11-00/501, Crew Oxygen System
(4)
IPC 35-11-18
B. Access
(1) Location Zone
221 Control Cabin Left
222 Control Cabin Left
C. Procedure
S 912-006
(1)
Read and obey the safety precautions and general instructions before you do the maintenance (AMM 35-00-00/201).
S 542-025
(2)
Peel off the protective cover from the face mask goggle, if it is on the mask.
NOTE: A protective cover may be installed on the mask goggle by
____ the manufacturer, which may obstruct vision when you use the mask. Make sure you peel off the protective cover before you stow the mask, if it is on the mask.
S 862-002
(3) Make sure the harness and oxygen supply hose are not twisted.
S 862-003
WARNING:_______DO NOT PRESS THE INFLATION EARS ON THE RED HARNESS. THIS WILL INFLATE THE HARNESS, AND PREVENT THE CORRECT STOWAGE OF THE MASK/REGULATOR.
(4) Stow the crew oxygen mask/regulator:
(a) Hold the mask and wind the hose into a coil in the stowage box.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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747-400
MAINTENANCE MANUAL
ON/OFF FLOW VALVE BLINKER
MASK STOWAGE
BOX (4 LOCATIONS)
PIN
HOSE
MASK
STOWAGE
TOP VIEW BOX
TAB MASK REGULATOR
SEE A
PLASTIC
STOP
MASK
FACE PIECE
SPACER
HARNESS (2 LOCATIONS)
EQUALLY MASK
COILED HOSE STOWAGE
BOX
DILUTION
PIN SIDE VIEW CONTROL
REGULATOR
FLAG HOLE BLINKER
RESET
LEVER SUPPLY HOSE
NORMAL
POSITION
RIGHT LID
(OPEN)
SAFETY
(CLOSED) LEFT LID A BSEE BUTTON B BUTTON SAFETY
Crew Oxygen Mask Packing Procedure
Figure 201
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 MAINTENANCE MANUAL
(b)
Carefully push the hose down to make the coils equal.
(c)
When most of the hose is in a coil, hold the two large spacers at the back of the harness and carefully pack them down onto the hose.
(d)
Put the harness carefully into the stowage box, while you push the mask/regulator forward.
NOTE: Harness must be on top of the hose.
____
(e)
Make sure the mask/regulator and supply hose are correctly positioned in the stowage box. 1) Make sure the tab on the front of mask/regulator is on top
of the plastic stop inside the stowage box. 2) Make sure the first two spacers of the harness are on top of the mask face piece. 3) Make sure the harness will not touch the ON-OFF valve or the flow blinker when you close the stowage box lids.
(f)
Put the supply hose at the center of the bottom of the mask stowage box.
(g)
Push the hose in sufficiently to provide clearance between the hose attachments and the mask face seal.
(h)
Make sure the dilution control is on 100 percent and the safety button is on normal.
(i)
Close the left lid of the stowage box.
(j)
Slide the RESET lever on the left lid and make sure the flag can not be seen.
(k)
Put the pin on the left lid in the hole on the left side of the mask regulator, if applicable.
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