# SDR SWAA2024080211121

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 2024
- Submitted: August 2, 2024
- Operation: Air carrier
- Aircraft: [N478WN](https://openairdocs.org/aircraft/N478WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33989
- Aircraft time: 66,062 hours, 39,438 cycles
- System (JASC): [3397 · Light System Wiring](https://openairdocs.org/jasc/3397)
- Part: Wire
- Condition: Chafed
- 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/SWAA2024080211121

## Discrepancy

EMERGENCY LIGHT WIRES ARE CHAFED BS757 BETWEEN S-21R AND S-22R<[01] REPAIRED CHAFFED WIRES AT BS757 BETWEEN S-21R AND S-22R PER SWPM 20-30-12. <BR><BR>FUNCTIONAL CHECK OF EMERGENCY LIGHTS TO BE PERFORMED ON CCN TTG8Q00U2CNM;[02] VERIFIED COMPLETION CORRECTIVE ACTION 1 AND MEASUREMENT TABLE.

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