# SDR UALA2009111603547

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 13, 2009
- Submitted: November 17, 2009
- Operation: Air carrier
- Aircraft: [N788UA](https://openairdocs.org/aircraft/N788UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 26942
- Aircraft time: 55,236 hours, 8,089 cycles
- Engine: Pwa PW40903
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Precooler
- Part number: 23417441
- Part serial: 1005
- Condition: Cracked
- Location: Bleed Air Sys
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2009111603547

## Discrepancy

NR 1 ENG FAILED DUCT LEAK TEST.  FOUND LARGE CRACK ON NR 1 ENG PRECOOLER.  REPLACED PRECOOLER.  AFT PRECOOLER CLAMP LEAKING AT HINGE POINTS.  RE-SECURED, SECURED ENGINE COWLS.

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