# SDR SWAA2022012885452

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 2017
- Submitted: January 31, 2022
- Operation: Air carrier
- Aircraft: N758SW
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 27873
- Aircraft time: 62,874 hours, 36,551 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Stiffener
- Condition: Corroded
- Location: Asd Threshold
- 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/SWAA2022012885452

## Discrepancy

***CORROSION*** ON LOWER STIFFENER AT STA 959; RBL53;WL206 / REMOVED CORROSION ON LOWER STIFFENER AT STA 959 RBL53 WL206 IN AN AREA OF 1'X2'X0.029' OF AN ORIGINAL THICKNESS OF 0.100'. FOUND TO BE OUT OF LIMITS IAW SRM 53-70-15-1A-1 FIG 103 DETAIL E RECIEVED REPLACEMENT STIFFENER SI# 7530404 MPN 147A8530U10. STIFFENER TO BE INSTALLED ON CUSTOMER CARD DEFECT# N099648 SA-M 326 ITEM#5

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