# SDR KCSA2025102057

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 20, 2025
- Submitted: October 22, 2025
- Operation: Air carrier
- Aircraft: [N770CK](https://openairdocs.org/aircraft/N770CK), registered now
- Make and model: Boeing 777-36NER
- Registry model: [Boeing 777-36NER](https://openairdocs.org/model/boeing-777-36ner) (OpenAirDocs)
- Aircraft serial: 32792
- Aircraft time: 73,428 hours, 13,628 cycles
- System (JASC): [5240 · Service Doors](https://openairdocs.org/jasc/5240)
- Part: Relay
- Part number: BACR13CF2AB
- Condition: Faulted
- Location: Zone 800
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/KCSA2025102057

## Discrepancy

DOOR FLIGHT LOCK R1 STATUS MESSAGE. ACTION TAKEN: REMOVED AND REPLACED RELAY K52201 IAW FIM 52-11 TASK 826 AND SWPM 20-81-22, NO HELP. CORROSION FOUND ON R1 DOOR FLIGHT LOCK MECHANISM SPRING. LUBRICATED FLIGHT LOCK MECHANISIM IAW AMM 12-21-20, OPS CHECKED GOOD IAW AMM 52-11-26, STATUS CLEARED.

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