# SDR AALA202206145787

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 22, 2022
- Submitted: June 14, 2022
- Operation: Air carrier
- Aircraft: [N335SN](https://openairdocs.org/aircraft/N335SN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 44481
- Aircraft time: 3,493 hours, 1,416 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Canister
- Condition: Discharged
- Location: Zone 200 - Fuse
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A, G
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202206145787

## Discrepancy

AIRCRAFT WAS GROUNDED: WITH SINGLE BLEED SOURCE CABIN ALTITUDE CONTINUED TO RISE. STOPPED CLIMB AND DESCENDING O2 MASKS DROPPED DURING DESCENT. FLIGHT DIVERTED TO SJU. **SUPPLEMENTAL REPORT FOR AALA202205262092: REMOVED AND REPLACED AUXILIARY POWER UNIT BLEED VALVE (AALA202205262092) PER AMM 49-52-11. REMOVED AND REPLACED DISCHARGED O2 CANISTERS AT ALL PASSENGER SEATS AND 3 FLIGHT ATTENDANT STATIONS.** (CLOSED)

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