10-11-02
 ALL  ú ú 02 Page 234 ú Jun 20/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 ~............................................................................... | | Procedures Repeat Intervals (Days) | | ....................................... | | | | | | | | | As| | Item | Initial | 7 | 14| 30| 60| 90|180|Rqd| ................................................................................. | WARNING:_______OBEY THE PRECAUTIONS IN | | | | | | | | | | AMM 12-15-08 WHEN YOU REMOVE | | | | | | | | | | AND INSTALL OXYGEN | | | | | | | | | | CYLINDERS. IF YOU DO NOT | | | | | | | | | | OBEY THE PRECAUTIONS, INJURY | | | | | | | | | | TO PERSONS OR DAMAGE TO | | | | | | | | | | EQUIPMENT CAN OCCUR. | | | | | | | | | | | | | | | | | | | | 1. Remove the portable oxygen cylinders | X | | | | | | | | | and the crew oxygen cylinders (this | | | | | | | | | | includes the regulator). Follow | | | | | | | | | | the operator's standard procedures | | | | | | | | | | and put them in a spares storage. | | | | | | | | | | | | | | | | | | | | NOTE: Attach a tag that identifies | | | | | | | | |
____ | each cylinder as a serviceable| | | | | | | | | | part when the pressure is | | | | | | | | | | above 50 psi. Also do this if| | | | | | | | | | the hydrostatic test date has | | | | | | | | | | not expired. When the the | | | | | | | | | | hydrostatic test date has | | | | | | | | | | expired, follow the operator's| | | | | | | | | | standard procedures. | | | | | | | | | .................................................................................
 | 2. Put a cap on the cylinder end of the | X |  |  |  |  |  |  |  |
 |  oxygen distribution lines.  Also,  |  |  |  |  |  |  |  |  |
 |  put a cap on the connector end of  |  |  |  |  |  |  |  |  |
 |  the hoses that are in the oxygen  |  |  |  |  |  |  |  |  |
 |  mask stowage boxes.  Put clean  |  |  |  |  |  |  |  |  |
 |  polyethylene bags on the lines and  |  |  |  |  |  |  |  |  |
 |  hoses that have the caps.  Attach  |  |  |  |  |  |  |  |  |
 |  red flags to the bags  |  |  |  |  |  |  |  |  |
 |  (AMM 35-11-51/401).  |  |  |  |  |  |  |  |  |

 ................................................................................. | 3. Remove the crew system oxygen masks. | X | | | | | | | | | Put the masks in clean polyethylene | | | | | | | | | | bags for storage. Seal the oxygen | | | | | | | | | | hose connector on the stowage box | | | | | | | | | | assembly with a cap. | | | | | | | | |
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 10-11-02
 ALL  ú ú 02 Page 235 ú Jun 20/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 ~............................................................................... | | Procedures Repeat Intervals (Days) | | ....................................... | | | | | | | | | As| | Item | Initial | 7 | 14| 30| 60| 90|180|Rqd| ................................................................................. | POTABLE WATER SYSTEM | | | | | | | | |
____________________ ................................................................................. | Short and Long Term | | | | | | | | |
___________________ .................................................................................
 | 1. Drain all of the water system.  This |  X  |  |  |  |  |  |  |  |
 |  includes the galley and the lavatory |  |  |  |  |  |  |  |  |
 |  tanks.  Do a purge of the complete  |  |  |  |  |  |  |  |  |
 |  potable water system with dry air and|  |  |  |  |  |  |  |  |
　
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