# SDR UALA2010011800211

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2010
- Submitted: February 8, 2010
- Operation: Air carrier
- Aircraft: [N773UA](https://openairdocs.org/aircraft/N773UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26929
- Aircraft time: 58,694 hours, 11,684 cycles
- Engine: Pwa PW4077
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Combust Chamber
- Condition: Damaged
- Location: Apu Engine
- Component: Apu
- Component part number: 38005501
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2010011800211

## Discrepancy

APU LIMIT MSG DURING ENG START.  DIS-CONNECTED APU THRU STEP NR 2.G. FOUND 2" HOLE ON SIDE OF COMBUSTION SECTION OF APU.  LOWER LT SIDE. REPLACED APU, OPS CK AND LEAK CK 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.