# SDR ASAA2025120863474

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 8, 2025
- Submitted: January 3, 2026
- Operation: Air carrier
- Aircraft: [N273AK](https://openairdocs.org/aircraft/N273AK), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 61554
- Aircraft time: 29,646 hours, 9,589 cycles
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Part number: 147A311043
- Condition: Corroded
- Location: Zone 100
- 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/ASAA2025120863474

## Discrepancy

AFT FUSELAGE LAV VENT HAS AREAS OF CORROSION. GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT OF LIMITS REPAIRED LAV VENT IAW SRM 53-20-01-2R-3W: 1" O: .125" R: .086" L: 2.5" D: .039".

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