# SDR UALA2009120703783

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 7, 2009
- Submitted: December 18, 2009
- Operation: Air carrier
- Aircraft: [N228UA](https://openairdocs.org/aircraft/N228UA), registered now
- Make and model: Boeing 777222
- Aircraft serial: 30556
- Aircraft time: 32,731 hours, 4,033 cycles
- Engine: Pwa PW40903
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Heat Exchanger
- Part number: 8102089
- Part serial: 253
- Condition: Cracked
- Location: Rt
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UALA2009120703783

## Discrepancy

RT PACK OVERHEAT.  REPLACED INLET CONDITION TEMP SENSOR, NO HELP.  WHILE REPLACING FLOW CONTROL VALVE AMT FOUND HEAT EXCHANGER WITH AN 8" CRACK, REPLACED HEAT EXCHANGER, NO LEAKS DETECTED.

---
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.