# SDR SWAA2022010450050

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 3, 2021
- Submitted: January 4, 2022
- Operation: Air carrier
- Aircraft: [N234WN](https://openairdocs.org/aircraft/N234WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 32502
- Aircraft time: 52,359 hours, 31,270 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Retainer
- Condition: Corroded
- Location: Fuselage
- Stage of operation: UK
- 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/SWAA2022010450050

## Discrepancy

CORROSION; AFT CARGO DOORWAY SUB THRESHOLD IB CHORD; LWR NUTPLATE RETAINER STRIP BS 794.5 + 1 RBL 19.  EVALUATED CORROSION; FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS IN THE SRM AND REQUIRES REPLACEMENT IAW SRM 51-10-02-0G-0.  REMOVED SUB THRESHOLD IB CHORD; LOWER NUTPLATE RETAINER STRIP IAW SRM 51-40-02-0G-0. LOCATED; DRILLED; DEBURRED NEW NUTPLATE RETAINER IAW SRM 51-40-05-0G-0, DWG 146A8340.  INSTALLED NEW NUTPLATE RETAINER IAW SRM 51-40-02-0G-0, DWG 146A8340.  INSTALLED NEW NUTPLATE RETAINER IAW SRM 51-40-02-0G-0, DWG 146A8340.

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