# SDR SWAA2023011329762

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 12, 2023
- Submitted: January 13, 2023
- Operation: Air carrier
- Aircraft: [N477WN](https://openairdocs.org/aircraft/N477WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 33988
- Aircraft time: 62,336 hours, 37,081 cycles
- System (JASC): [5510 · Horizontal Stabilizer Structure](https://openairdocs.org/jasc/5510)
- Part: Seal
- Condition: Cracked
- Location: Horizontals Tab
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWAA2023011329762

## Discrepancy

LEFT HORIZONTAL UPPER FRONT SPAR SLIDING SEAL IS CRACKED.   REMOVED AND REPLACED LH HORIZONTAL UPPER FRONT SPAR SLIDING SEAL IN ACCORDANCE WITH AMM 53-31-31. OPS CHECK GOOD.

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