# SDR SWAA2021082520441

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2020
- Submitted: August 25, 2021
- Operation: Air carrier
- Aircraft: [N427WN](https://openairdocs.org/aircraft/N427WN), registered now
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29831
- Aircraft time: 61,697 hours, 36,249 cycles
- System (JASC): [5340 · Fuselage Main, Attach Fittings](https://openairdocs.org/jasc/5340)
- Part: Mount
- Condition: Corroded
- Location: Bs 1088
- 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/SWAA2021082520441

## Discrepancy

CORROSION ON APU INLET MOUNTING FLANGE AT B.S . 1088; R.B.L. 22-32; WL 270 ON LOWER FLANGE. / REMOVED AND REPLACED FILLER ON APU INLET MOUNTING FLANGE BS1088 RBL22-32 ON LOWER FLANGE FABRICATED FROM 2024T3# 0.071' CLAD LOT# 1401376-1 IAW SRM 51-40-02; DWG 148A0924 AND PL65-46572. 89004U; 23MAR20.

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