# SDR ASAA2022090639894

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 6, 2022
- Submitted: September 9, 2022
- Operation: Air carrier
- Aircraft: [N557AS](https://openairdocs.org/aircraft/N557AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35176
- Aircraft time: 59,405 hours, 17,260 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Part number: 147A31103
- Condition: Corroded
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022090639894

## Discrepancy

REF DEFECT 60413749 CORROSION FOUND ON SKIN AT LAV VENT HOLE. GROUNDED - YES. DAMAGE FOUND TO BE 100% THRU, CUT OUT DAMAGE & REPAIRED SKIN IAW B737-800 SRM 53-70-01-2R-3 THIS IS A CAT B REPAIR WITH AN INSP THRESHOLD OF 67, 260 CYCLES TOTAL & 5,000 CYCLE INTERVAL W = 3 O = .1255 R = 0 L = 4 D = .125.

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