# SDR CALA2026073118137

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 31, 2026
- Submitted: July 31, 2026
- Operation: Air carrier
- Aircraft: [N75853](https://openairdocs.org/aircraft/N75853), registered now
- Make and model: Boeing 757324
- Aircraft serial: 32812
- Aircraft time: 69,670 hours, 22,612 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: D71702001
- Condition: Faulted
- 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/CALA2026073118137

## Discrepancy

EMERGENCY LIGHTS OPS TEST WITH THE TEST SWITCH PROCEDURE,  LT AFT OVERWING EXIT IDENTIFIER NEEDS RELAMPED RELAMPED 3 INOP LAMPS REF AMM 33-51-10-962-040 OPS CK FAILED ALL LAMPS ON THIS ASSY INOP REPLACED FUSE F4 IN M11383POWER SUPPLY. LIGHTS OP CK GOOF REF AMM 33-51-00-715-039 PARTS USED:AD-B215-06,QTY :1

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