# SDR KCSA2026053131

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 31, 2026
- Submitted: June 2, 2026
- Operation: Air carrier
- Aircraft: [N769CK](https://openairdocs.org/aircraft/N769CK), registered now
- Make and model: Boeing 777-36NER
- Registry model: [Boeing 777-36NER](https://openairdocs.org/model/boeing-777-36ner) (OpenAirDocs)
- Aircraft serial: 32793
- Aircraft time: 79,493 hours, 13,917 cycles
- System (JASC): [3320 · Passenger Compartment Lighting](https://openairdocs.org/jasc/3320)
- Part: Control Unit
- Part number: 285W0027101
- Part serial: D02004
- Condition: Faulted
- Location: Zone 200
- Part time: 78,026 hours, 13,978 cycles
- Stage of operation: CR
- 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/KCSA2026053131

## Discrepancy

100288228: BUNK LIGHTS INOP.   REMOVED AND REPLACED ZONE MANAG. UNIT (ZMU) IAW IAI B777-300 AMM 23-39-04 OPS CK GOOD.

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