# SDR UALA2010101203795

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 10, 2010
- Submitted: October 22, 2010
- Operation: Air carrier
- Aircraft: [N665UA](https://openairdocs.org/aircraft/N665UA), registered now
- Make and model: Boeing 767322
- Aircraft serial: 29237
- Aircraft time: 43,654 hours, 12,020 cycles
- Engine: Pwa PW4056
- System (JASC): [2421 · AC Generator-Alternator](https://openairdocs.org/jasc/2421)
- Part: Gcu
- Part number: M734284DF
- Part serial: 81
- Condition: Faulty
- Location: Right
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010101203795

## Discrepancy

CREW REPORTS ON TAXIOUT GOT RT ENG IDG VALVE EICAS MESSAGE.  VALVE LOCKED OUT PER MEL 7521D.  ACP COMPONENT RESISTANCE CHECK AND OPERATIONAL TEST WITH  EXTERNAL AIR USING MIPS PW 4000 IDG AOC TS. VALVE OPERATED WITH NO MSG. ACCOMPLISHED BLOCK 6 POWER RUN. VERIFIED VALVE OPENED AND CLOSED OUT TEMP COOLED. NO STATUS MSG ALSO REPLACED GCU AND RELAY K1031. ALL OPERATIONS CHECKED ON RUN. BPCU CLEAN AFTER RUN. DID NOT REPLACE K1031, BUT REPLACED K971 (R IDG AIR COOLER VLV RELAY).

---
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, except the copies of manufacturers’ service documents, which belong to their rights holders.