# SDR CALA2023050501362

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 4, 2023
- Submitted: May 5, 2023
- Operation: Air carrier
- Aircraft: [N2243U](https://openairdocs.org/aircraft/N2243U), registered now
- Make and model: Boeing 777-300ER
- Registry model: [Boeing 777-300ER](https://openairdocs.org/model/boeing-777-300er) (OpenAirDocs)
- Aircraft serial: 63723
- Aircraft time: 24,500 hours, 2,723 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen Bottle
- Part number: 4441806022
- Part serial: 4180602208591
- Condition: Unserviceable
- Location: Lavatory A
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2023050501362

## Discrepancy

DURING LAVATORY CDS OXYGEN SYSTEM INSPECTION FOUND LAV ''A'' CDS O XYGEN CYLINDER DISCHARGE INDICATOR DAMAGED. TO REPLACE CDS OXYGEN CYLINDER TEST AS PER AMM TASK 35-21-00-710-801. TEST PASSED. P/N ON:4441806-022 S/N ON:41806-022-05983 FOUND THE LANYARD ASSY DISENGAGED FROM THE OXYGEN CYLINDER. CARRIED OUT OXYGEN BOX LATCH/ACTUATOR OPERATIONAL TEST AS PER AM REPLACED THE OXYGEN CYLINDER AS PER AMM TASK 35-21-02. M TASK 35-21-00-710-801. TEST PASSED. P/N OFF:4441806-022 S/N OFF:41806-022-08591 WORK ACCOMPLISHED BY V943668 REPLACED LAV A OXYGEN CYLINDER AS PER AMM TASK 35-21-02. P/N OFF:4441806-022 S/N OFF:41806-022-06222 P/N ON:4441806-022 S/N ON:41806-022-08591 CARRIED OUT OXYGEN BOX DOOR LATCH/ACTUATOR OPERATIONAL COMPLETED

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