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An avionics' technician reports finding an electrical wire bundle chafing inside a P320 ground service/ handling power panel at the door hinge area; in the main equipment center; on a B777-200 aircraft. Additional wires for an ife power cut-off switch service bulletin (sb) and seat modifications increased the bundle size raising concerns about arcing and possible fire.
| Attributes | |
| ACN | 1056160 |
| Time | |
| Date | 201212 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B777-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Cabin Entertainment |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Avionics Maintenance Airframe |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy |
Narrative:
During an ife switch installation and seat conversion on B777 aircraft; while accomplishing the above listed service bulletin (sb) ; wires are added to the P320 panel [in the main equipment center]. I have been involved directly with this sb on several aircraft. Out of curiosity I wanted to check on how the [P320] panel modification looked after being returned to service and in december 2012; I had the opportunity to inspect aircraft X; a B777-200; then in c-check at ZZZ dock-1. Upon looking inside the panel I noticed that there appeared to be an interference issue with the main [electrical] bundle that runs up and down the inside of the panel door; near the hinge. It is my belief that this may cause a potential for arcing or the possibility of fire. I subsequently notified the lead mechanic on the conversion [project] of the potential issue on aircraft X to insure that the problem will be address on that aircraft.
Original NASA ASRS Text
Title: An Avionics' Technician reports finding an electrical wire bundle chafing inside a P320 Ground Service/ Handling Power panel at the door hinge area; in the Main Equipment Center; on a B777-200 aircraft. Additional wires for an IFE power cut-off switch Service Bulletin (SB) and seat modifications increased the bundle size raising concerns about arcing and possible fire.
Narrative: During an IFE switch installation and seat conversion on B777 aircraft; while accomplishing the above listed Service Bulletin (SB) ; wires are added to the P320 panel [in the Main Equipment Center]. I have been involved directly with this SB on several aircraft. Out of curiosity I wanted to check on how the [P320] panel modification looked after being returned to service and in December 2012; I had the opportunity to inspect Aircraft X; a B777-200; then in C-Check at ZZZ Dock-1. Upon looking inside the panel I noticed that there appeared to be an interference issue with the main [electrical] bundle that runs up and down the inside of the panel door; near the hinge. It is my belief that this may cause a potential for arcing or the possibility of fire. I subsequently notified the Lead Mechanic on the conversion [project] of the potential issue on Aircraft X to insure that the problem will be address on that aircraft.
Data retrieved from NASA's ASRS site as of July 2013 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.