# SDR AALA202201133980

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 12, 2022
- Submitted: January 13, 2022
- Operation: Air carrier
- Aircraft: [N776XF](https://openairdocs.org/aircraft/N776XF), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 2209
- Aircraft time: 56,363 hours, 28,054 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Regulator Valve
- Part number: 6774E010000
- Part serial: 00758
- Condition: Fluctuates
- Location: Zone 400 - Nac/P
- Part time: 43,634 hours, 26,458 cycles
- Stage of operation: CR
- 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/AALA202201133980

## Discrepancy

AIRCRAFT WAS GROUNDED: ENGINE 2 BLEED FLUCTUATES 24 - 38 PSI AT 20 CYCLES PER MIN. RESULTS IN CONSTANT CABIN PRESSURE FLUCTUATIONS, -250 TO +150 FPM..REPLACED #2 ENGINE PRESSURE REGULATING VALVE  AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 36-11-52.

---
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.