# SDR 2008UALA05756

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2008
- Submitted: October 7, 2008
- Operation: Air carrier
- Aircraft: N552UA
- Make and model: Boeing 757222
- Aircraft serial: 26641
- Aircraft time: 63,604 hours, 18,315 cycles
- Engine: Pwa PW2037
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Valve
- Part number: 2790598101
- Condition: Faulty
- Location: Nr 2
- Stage of operation: CR
- How discovered: O
- Nature of condition: W
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2008UALA05756

## Discrepancy

SPLIT DUCTS AT 30000 RT 10 PSI HIGHER THAN LEFT AT CRUISE THRUST SMALLER SPLIT AT IDLE THRUST.  NR 2 HIGH STAGE VALVE WEAK.  REPLACED NR 2 HIGH STAGE VALVE.  OPS CHECK ON GROUND RUN NORMAL.

---
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.