# SDR ASAA2022012437276

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 24, 2022
- Submitted: February 1, 2022
- Operation: Air carrier
- Aircraft: [N237AK](https://openairdocs.org/aircraft/N237AK), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36357
- Aircraft time: 20,441 hours, 6,785 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Web
- Part number: 146A8123U25
- Condition: Corroded
- 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/ASAA2022012437276

## Discrepancy

AFT PIT DOOR SUROUND LOWER SILL WEB CORRODED MILTIPLE AREAS BETWEEN STA 787 TO STA 847. GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-60-15-1A-1. REMOVED AND REPLACED SILL WEB IAW 737-900ER SRM 51-40-02-0G-0.W= 2" O= .050 R= .041 L= 4" D= .009.

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