# SDR 2000UALA00722

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 28, 2000
- Submitted: January 17, 2001
- Operation: Air carrier
- Aircraft: N7267U
- Make and model: Boeing 727222
- Aircraft serial: 21414
- Aircraft time: 65,248 hours, 37,115 cycles
- Engine: Pwa JT8D15
- System (JASC): [2440 · External Power System](https://openairdocs.org/jasc/2440)
- Part: Contactor
- Part number: B102F
- Condition: Damaged
- Location: External Power
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2000UALA00722

## Discrepancy

INBOUND CREW REPORTED THAT THE EXTERNAL POWER LIGHT FLICKERED THROUGHOUT THE FLIGHT.  WHEN ATTEMPTING TO HOOK UP EXTERNAL POWER SPARKS APPEARED AT THE PANEL.  *S/D*  EXTERNAL POWER CONTACTOR.  REPLACED R56 EXTERNAL POWER CONTACTOR REF WDM 24-41-12, RAN ALL 3 ENGINES ON LINE CHECKS, NORMAL REF JRH.  FOUND ONE CONTACT CLOSED ON OLD RELAY.  NO HISTORY.  ALSO REPLACED BUS PROTECTION PANEL, CHECKED GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.