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After replacing the #1 engine integrated drive generator (idg) on a B757-200 aircraft; a line mechanic defers the idg because he was unable to bring the idg on-line during an engine run. A downline maintenance station finds all four generator power cables attached 180-degrees out (reversed) at the terminal block.
| Attributes | |
| ACN | 937787 |
| Time | |
| Date | 201012 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | AC Generator/Alternator |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy |
Narrative:
After replacement of #1 engine integrated drive generator (idg); [was] unable to test idg per maintenance manual (MM) 24-11-00-501; because [I was] unable to put it online. #1 engine idg deferred out of ZZZ due to time; [in] december 2010. One day later; ZZZ1 maintenance found 4-each idg cables installed 180-degree out (mechanic that signed-off deferred was called the next day). All three of the idg electrical phase cables and one each ground cable are exact same diameter and [with same size phase lead] lugs.
Original NASA ASRS Text
Title: After replacing the #1 engine integrated drive generator (IDG) on a B757-200 aircraft; a Line Mechanic defers the IDG because he was unable to bring the IDG on-line during an engine run. A Downline Maintenance Station finds all four generator power cables attached 180-degrees out (reversed) at the terminal block.
Narrative: After replacement of #1 engine integrated drive generator (IDG); [was] unable to test IDG per Maintenance Manual (MM) 24-11-00-501; because [I was] unable to put it online. #1 engine IDG deferred out of ZZZ due to time; [in] December 2010. One day later; ZZZ1 Maintenance found 4-each IDG cables installed 180-degree out (Mechanic that signed-off deferred was called the next day). All three of the IDG electrical phase cables and one each ground cable are exact same diameter and [with same size phase lead] lugs.
Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.