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 |  | contamination.  | 2.  Replace the filter elements in  |
 |  |  |  the pressure/case drain module  |
 |  |  |  for the applicable pump  |
 |  |  |  (AMM 29-11-17, 29-11-18,  |
 |  |  |  and 29-11-19/401).  |
 |  |  | 3.  Do a check of the differential  |
 |  |  |  pressure indicator for the return  |
 |  |  |  module (AMM 29-11-13/201 or  |
 |  |  |  29-11-15/201).  If it is extended  |
 |  |  |  refer to condition No. 4.  |

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757
MAINTENANCE MANUAL

 ~............................................................................... | CONDITION | CONDITION | PROCEDURE TO CORRECT THE CONDITION | | NO. | | | .................................................................................
 | 3. | A pump overheat because | 1.  Examine the supply, the pressure,  |
 |  | the supply fluid  |  and case drain hoses and the  |
 |  | decreased.  |  heat shields for heat damage.  |
 |  |  |  Replace all the components that  |
 |  |  |  have heat damage.  |
 |  |  | 2.  Flush the pump pressure and the case|
 |  |  |  drain lines.  |
 |  |  | 3.  Replace the applicable  |
 |  |  |  pressure/case drain filter elements.|
 |  |  |  (AMM 29-11-17/401, 29-11-18/401,  |
 |  |  |  and 29-11-19/401).  |

 ................................................................................. | 4. | The differential | 1. Replace the filter element for the | | | pressure indicator for | return module (AMM 29-11-13/201, | | | the return filter module| 29-11-15/201). | | | extends because of a | 2. Flush the return line (Ref par. 9). | | | pump failure that | 3. Flush the pressure and the case | | | causes hydraulic fluid | drain lines. | | | contamination. | | | | | 4. Replace the filter elements in the | | | | applicable pressure/case drain | | | | module (AMM 29-11-17/401, | | | | 29-11-18/401, 29-11-19/401). | ................................................................................. | 5. | A failure of the check | 1. Replace the check valve which does | | | valve for the pressure | not operate. Disassemble and clean | | | or the case drain line | the remaining check valves in the | | | occurs due to a pump | pressure and case drain lines and | | | failure | modules (Ref 29-11-17/201, | | | | 29-11-18/201, and 29-11-08/201). | | | | 2. Flush the applicable pressure/case | | | | drain lines. | | | | | | | | 4. Do a check of the differential | | | | pressure indicator on the | | | | applicable Return Module. | | | | (AMM 29-11-13/401 or 29-11-15/401). | | | | If it has extended, refer to | | | | condition No. 4. | .................................................................................
　
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