# SDR CALA2026072918086

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 28, 2026
- Submitted: July 29, 2026
- Operation: Air carrier
- Aircraft: [N12021](https://openairdocs.org/aircraft/N12021), registered now
- Make and model: Boeing 787-10
- Registry model: [Boeing 787-10](https://openairdocs.org/model/boeing-787-10) (OpenAirDocs)
- Aircraft serial: 66990
- Aircraft time: 16,423 hours, 2,048 cycles
- System (JASC): [2400 · Electrical Power System](https://openairdocs.org/jasc/2400)
- Part: Circuit Breaker
- Condition: Tripped
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026072918086

## Discrepancy

C/B CE3351430 TRIPPED EMERGENCY LIGHTS MTC MSG 42-02164 ACTIVE. FIM DMC-B787-A-42-20-F5-G4A-421A-A. RESET CB. PER FIM ACP CMCF CROWN DOOR 3-2L CCS RDC 05 LRU RPL TEST, PASSED. PER FIM THIS WAS AN INTERMITTANT FAULT. TURNED ON EMERGENCY LIGHTS AND WALKED CABIN, ALL LIGHTS LIT & CB NO TRIP. ACP CMCF EMERGENCY LIGHTS SYSTEM TESTS QUICK EMERGENCY LIGHTING AND FULL EMERGENCY LIGHTING TESTS. COULD NOT DUPLICATE PROBLEM.

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