# SDR CALA2025071406505

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 11, 2025
- Submitted: July 14, 2025
- Operation: Air carrier
- Aircraft: [N835UA](https://openairdocs.org/aircraft/N835UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1426
- Aircraft time: 71,791 hours, 32,269 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen Box
- Part number: 14C15R212170004
- Part serial: BEFB2507
- Condition: No Test
- Location: Zone 200
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025071406505

## Discrepancy

SEAT 21DEF OXYGEN MASK COMPARTMENT DID NOT OPEN DURING OPERATIONAL REST. REMOVED OXYGEN BOX AT SEAT 21DEF, REF AMM 35-21-41.  READY FOR INSPECTION PART NUMBER VERIFICATION AND CLEARANCE TO INSTALL.   PART VERIFICATION AND CLEARANCE NOT REQUIRED FOR INSTALLATION OF PSU REF GMM 09-10-05 COMPLETED INSTALLATION OF SEAT 21DEF OXYGEN BOX, REF AMM35-21-41.  DROP TEST PASSED WITH ALL MASKS DROPPING, RELATCHED COVERS, REF AMM 35-23-00.   VERIFIED INSTALLATION OF O2 GEN AT SEAT 21DEF REF GMM 09-10-05

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