# SDR CALA2026020413548

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 2, 2026
- Submitted: February 4, 2026
- Operation: Air carrier
- Aircraft: [N847UA](https://openairdocs.org/aircraft/N847UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1627
- Aircraft time: 72,037 hours, 32,427 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 90241570403
- Part serial: 17182339
- Condition: Defective
- Location: Zone 100
- Part time: 16,816 hours, 8,600 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026020413548

## Discrepancy

SAFETY VALVE STUCK  OPEN CPC 1 TESTS OK. SUGGEST REPLACING CAB PR SAFTEY VALVE 6HL AND CPC 2. REF AMM 21-31-52/401 CONFIG 00. ENSURE SAFETY VALVE 7HL IS CLOSED UNLESS IT CAN BE POSITIVELY DETERMINED WHICH SAFETY VALVE OPENED, PER TSM 21-31-00-810-808-A, NEED TO REPLACE THE SAFETY VALVE (6HL) & THE SAFETY VALVE (7HL) IAW AMM 21-31-52-000-001 & AMM 21-31-52-400-001.  PERFORMED REMOVAL OF SAFETY VALVES 6HL AND 7HL IAW AMM 21-31-52-000-001-A.  UNLOCKING FOR SIGN OFF PERFORMED INSTALLATION OF SERVICEABLE SAFETY VALVES 6HL AND 7HL IAW AMM 21-31-52-400-001-A. PERFORMED OPS TEST OF THE POSITION INDICATION OF THE SAFETY VALVES REF AMM TASK 21-31-00-710-006-A. OPS CHK GOOD.

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