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757 MAINTENANCE MANUAL
 (b)  6B6, R GEN DRIVE DISC
 S 016-080
 (2)  Open the fan cowl panels (AMM 71-11-04/201).
 F. Procedure
 S 286-073
 (1)  Do these steps to examine the Pressure Differential Indicator (DPI).
 NOTE: The DPI is the red button adjacent to the scavenge filter on
____
 the IDG.

 (a)  If the DPI is in the up position, examine the scavenge filter condition, the IDG oil condition and do actions in the DPI Extension table:
 NOTE: When the DPI is in the up position and if the
____ DPI Resets decal shows it is the 4th DPI extension, the IDG must be replaced.
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MAINTENANCE MANUAL

 ~.............................................................................. | DPI EXTENSION | ................................................................................ | SCAVENGE FILTER | | | | CONDITION | IDG OIL CONDITION | ACTION | ................................................................................ |No visible magnetic or |No oil discoloration, |1. Drain the oil. | |non-metallic particles |no signs of over-| | |(See NOTE for more |heating or chemical |2. Replace the scavenge | |scavenge filter data) |contamination of the | filter (AMM 24-11-02/201).| |*[1] |oil is not suspected | | | | |3. Service with oil | | | | (AMM 12-13-03/301). | ................................................................................
 |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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757
MAINTENANCE MANUAL

 ~.............................................................................. | DPI EXTENSION | ................................................................................ | 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  |  |
　
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