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A line avionics technician reports their B737-800 nexgen aircraft external power panel (P19) receptacle has redesigned electrical pins that break more frequently; causing external power drop-offs; increase use of their apus and fuel burn to supply electrical power for their aircraft at the gates.
| Attributes | |
| ACN | 993710 |
| Time | |
| Date | 201202 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | External Power |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant Maintenance Avionics |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe |
Narrative:
I replaced a previously broken external power receptacle pin per the maintenance manual (M/M). This pin was subsequently broken again several days later (please see aircraft history). These pins break frequently due to their design. They are mounted by a small diameter threaded area which is a weak spot relative to the diameter of the pin. Also the external power cord receptacle housing is shallow and does not support the power cord well when it is connected.
Original NASA ASRS Text
Title: A Line Avionics Technician reports their B737-800 NexGen aircraft External Power Panel (P19) receptacle has redesigned electrical pins that break more frequently; causing External Power drop-offs; increase use of their APUs and fuel burn to supply electrical power for their aircraft at the gates.
Narrative: I replaced a previously broken External Power receptacle pin per the Maintenance Manual (M/M). This pin was subsequently broken again several days later (please see aircraft history). These pins break frequently due to their design. They are mounted by a small diameter threaded area which is a weak spot relative to the diameter of the pin. Also the External Power cord receptacle housing is shallow and does not support the Power Cord well when it is connected.
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.