................................................................................. | AIR CONDITIONING SYSTEM | | | | | | | | |
_______________________ ................................................................................. | Short and Long Term | | | | | | | | |
___________________ ................................................................................. | 1. Open and ventilate the air | X | | | | | | | | | conditioning mix bay. Keep | | | | | | | | | | open for the storage period. | | | | | | | | | ................................................................................. | 2. Drain the water extractor tubing | X | | | | | | | | | (AMM 21-51-04/401). | | | | | | | | | ................................................................................. | 3. If the engine storage option of | | | | | | | | X | | operating the engine to control the | | | | | | | | | | engine total acid number and water | | | | | | | | | | (Refer to POWER PLANT AND APU | | | | | | | | | | STORAGE) has been selected, operate | | | | | | | | | | the air conditioning systems | | | | | | | | | | (except the air flow multiplier) | | | | | | | | | | in conjunction with the engine run | | | | | | | | | | as follows: | | | | | | | | | ................................................................................. | A. Operate each air conditioning | | | | | | | | | | system with its related engine | | | | | | | | | | for the entire period of the | | | | | | | | | | engine run. | | | | | | | | |
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 ~............................................................................... | | Procedures Repeat Intervals (Days) | | ....................................... | | | | | | | | | As| | Item | Initial | 7 | 14| 30| 60| 90|180|Rqd| .................................................................................
 |4.  If the engine is removed for  |  X  |  |  |  |  |  |  | X |
 |  preservation storage and the APU is  |  |  |  |  |  |  |  |  |
 |  preserved by periodic operation  |  |  |  |  |  |  |  |  |
 |  (Refer to POWER PLANT AND APU  |  |  |  |  |  |  |  |  |
 |  STORAGE) do the procedures that  |  |  |  |  |  |  |  |  |
 |  follow:  |  |  |  |  |  |  |  |  |

 ................................................................................. | A. Cap the engine bleed ducts at the | | | | | | | | | | engine disconnect with the correct| | | | | | | | | | pressure type plugs. | | | | | | | | | ................................................................................. | B. Operate the air conditioning | | | | | | | | | | systems for a minimum of | | | | | | | | | | 10 minutes during each APU run | | | | | | | | | | (two packs at the same time). | | | | | | | | | ................................................................................. | HYDRAULIC SYSTEM | | | | | | | | |
________________ ................................................................................. | Short Term | | | | | | | | |
__________ ................................................................................. | 1. Make a check of the total hydraulic | X | | X | | | | | | | system for hydraulic fluid leakage. | | | | | | | | | | Repair the leakage as necessary. | | | | | | | | | | Do this check each 14-day cycle | | | | | | | | | | AMM 29-11-00/601. | | | | | | | | | ................................................................................. | 2. Make sure the hydraulic system is | X | | | | | | | | | filled with BMS 3-11 hydraulic fluid | | | | | | | | | | to the specified level | | | | | | | | | | (AMM 12-12-01/301). | | | | | | | | |
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 10-11-02
 ALL  ú ú 02 Page 228 ú Mar 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| .................................................................................
　
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