# SDR CALA2026041715433

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 11, 2026
- Submitted: April 17, 2026
- Operation: Air carrier
- Aircraft: [N77558](https://openairdocs.org/aircraft/N77558), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 67585
- Aircraft time: 10,694 hours, 3,535 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Light
- Condition: Inoperative
- Location: Zone 200
- Stage of operation: IN
- 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/CALA2026041715433

## Discrepancy

21F EMERGENCY EXIT WINDOW LIGHT LIGHT INOPERATIVE.   AIRCRAFT MOVED OFF GATE TO TAXI WAY UNABLE TO WORK ON ACFT ON TAXIWAY.  NOT EMERGENCY LIGHT, BUT WINDOW LIGHT.  DEFERED PER MEL 3321A.    REMOVED AND REPLACED OVERWING EXIT LIGHT ASSY AT 21F REF AMM 33-21-00-960-802. OPS CHECK GOOD.

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