# SDR ASAA2026072268294

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2026
- Submitted: August 27, 2026
- Operation: Air carrier
- Aircraft: [N566AS](https://openairdocs.org/aircraft/N566AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35182
- Aircraft time: 70,076 hours, 21,176 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Sill Drain
- Part number: 147A8540U7
- Condition: Corroded
- Location: Zone 200
- 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/ASAA2026072268294

## Discrepancy

AFT WET L/2 MOPSILL CORRODED IN MULTIPLE AREAS. GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW BOEING 737-800 SRM 53-70-15-1A-1, REMOVED AND REPLACED INNER CHORD (MOPSILL) IAW BOEING 737-800 SRM 51-40-02-0G-1 W= 2" O= .080 R= .063 L= 1" D= .017.

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