# SDR CALA2025022000388

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 20, 2025
- Submitted: February 20, 2025
- Operation: Air carrier
- Aircraft: [N24973](https://openairdocs.org/aircraft/N24973), registered now
- Make and model: Boeing 787-9
- Registry model: [Boeing 787-9](https://openairdocs.org/model/boeing-787-9) (OpenAirDocs)
- Aircraft serial: 40941
- Aircraft time: 33,537 hours, 3,183 cycles
- System (JASC): [3520 · Passenger Oxygen System](https://openairdocs.org/jasc/3520)
- Part: Oxygen System
- Part number: 4441158002
- 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/CALA2025022000388

## Discrepancy

OXYGEN SYSTEM TEST,OXYGEN ZONE 1R TEST CONDITION:FAILED. MM:35-100136 ZONE 1 RIGHT COLUMN HAS AN INTERNAL FAULT. FOUND FCR BUNK 2 PSU INDICATOR FLASHING. FCR BUNK 2 OXYGEN INITIATOR REPLACED FOUND SATIS IAW CMM35-22-29 & FCR BUNK 2 PSU RESTORED FOUND SATIS IAW AMM 35-21-04. INSTALLATION TEST C/OUT SATIS IAW AMM 35-21-04.ON MFG PN: 441158-002.

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