757 AMM 飞机维护手册 电源 ELECTRICAL POWER 1(32)

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 |No visible magnetic or  |Oil discoloration,  |1. Drain the oil.  |
 |non-metallic particles  |signs of overheating  |  |
 |(See NOTE for more  |or chemical  |2. Replace the scavenge  |
 |scavenge filter data)  |contamination of the  |  filter (AMM 24-11-02/201).|
 |*[1]  |oil is suspected  |  |
 |  |(Hydraulic fluid  |3. Service with oil  |
 |  |and water)  |  (AMM 12-13-03/301).  |
 |  |  |  |
 |  |  |4. Run the engine until the  |
 |  |  |  IDG oil temperature is  |
 |  |  |  175 degrees F.  |
 |  |  |  |
 |  |  |5. Drain the oil.  |
 |  |  |  |
 |  |  |6. Replace the scavenge  |
 |  |  |  filter (AMM 24-11-02/201).|
 |  |  |  |
 |  |  |7. Service with oil  |
 |  |  |  (AMM 12-13-03/301).  |
 |  |  |  |

 ................................................................................ |Visible magnetic or |No oil discoloration, |1. Replace the IDG | |non-metallic particles |no signs of over-| (AMM 24-11-01/401). | |in the scavenge filter |heating or chemical | | |and the scavenge filter |contamination of the | | |is not breached. |oil is not suspected | | |(See NOTE for more | | | |scavenge filter data) | | | |*[1] | | |
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757
MAINTENANCE MANUAL

 ~.............................................................................. | SCAVENGE FILTER AND OIL CONDITION CHECK | ................................................................................ | SCAVENGE FILTER | | | | CONDITION | IDG OIL CONDITION | ACTION | ................................................................................
 |Visible magnetic or  |Oil discoloration,  |1. Remove the IDG  |
 |non-metallic particles  |Signs of overheating  |  (AMM 24-11-01/401).  |
 |in the scavenge filter  |or chemical  |  |
 |and the scavenge filter  |contamination of the  |2. Flush the IDG oil system  |
 |is not breached.  |oil is suspected.  |  (AMM 12-13-03/301).  |
 |(See NOTE for more  |(Hydraulic fluid and  |  |
 |scavenge filter data)  |water)  |3. Replace the IDG  |
 |*[1]  |  |  (AMM 24-11-01/401).  |

 ................................................................................ |Visible magnetic or |Oil condition is not |1. Remove the IDG | |non-metallic particles |a factor | (AMM 24-11-01/401). | |in the scavenge filter | | | |and the scavenge filter | |2. Replace the IDG air/oil | |is breached. | | cooler (AMM 24-11-04/401).| |(See NOTE for more | | | |scavenge filter data) | |3. Replace the IDG oil cooler| |*[1] | | lines. | | | | | | | |4. Install a new IDG. | | | | (AMM 24-11-01/401). | ................................................................................ |*[1] NOTES: | |If the scavenge filter element or filter cover shows a number of moderately | |scattered, small metallic flakes (bronze or silver colored metal), flakes of | |generator insulation, black epoxy flakes, or sleeving, do not replace the IDG.| |These products are normal wear during IDG operation. | | | |If the filter element shows bright metal deposits that can be clearly | |specified as chunks or pieces caused by breakage, or a large number of small | |metallic flakes (bronze or silver colored metal), replace the IDG. These are | |indications of IDG internal damage. | | | |The filter is breached if the filter is damaged or missing, the O-ring is | |damaged or missing, or the filter cap is damaged or loose. | 2.........................…......................….............................1
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