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Mechanic reported that while investigating an MEL item; (idg feeder fault) on a crj-900; found damage to the idg feeder wires due to a missing clamp.
| Attributes | |
| ACN | 1360166 |
| Time | |
| Date | 201606 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | Regional Jet 900 (CRJ900) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Electrical Wiring & Connectors |
| Person 1 | |
| Function | Technician Lead Technician |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural MEL |
Narrative:
Aircraft with MEL 24-11-xx; idg 1/idg 1 feeder fault; 1 day remaining on MEL. When we opened the lh core cowl; damage was noted to idg feeder wires; one feeder wire burnt half way through. It was noted that an adel clamp was missing that attaches the feeder harness to engine stand-off bracket and the harness was routed in front of the remote oil service line when it's supposed to be routed behind the line. Had the harness been attached with adel clamp and routed correctly there would be no way for the feeder cables to chafe. So there is the cause of the damage. The engine was last replaced [recently with many] cycles ago. The C2 task card was last completed [in previous months.] improper routing of phase lead wiring and missing adel caused chaffing and eventual arching. This caused a idg failure.
Original NASA ASRS Text
Title: Mechanic reported that while investigating an MEL item; (IDG FEEDER FAULT) on a CRJ-900; found damage to the IDG Feeder wires due to a missing clamp.
Narrative: Aircraft with MEL 24-11-XX; IDG 1/IDG 1 FEEDER FAULT; 1 Day remaining on MEL. When we opened the LH core cowl; damage was noted to IDG Feeder wires; one feeder wire burnt half way through. It was noted that an Adel clamp was missing that attaches the feeder harness to engine stand-off bracket and the harness was routed in front of the remote oil service line when it's supposed to be routed behind the line. Had the harness been attached with Adel clamp and routed correctly there would be no way for the Feeder cables to chafe. So there is the cause of the damage. The engine was last replaced [recently with many] Cycles ago. The C2 Task card was last completed [in previous months.] Improper routing of phase lead wiring and missing ADEL caused chaffing and eventual arching. This caused a IDG failure.
Data retrieved from NASA's ASRS site 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.