# SDR ASAA2026042366001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 23, 2026
- Submitted: May 12, 2026
- Operation: Air carrier
- Aircraft: [N275AK](https://openairdocs.org/aircraft/N275AK), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 61556
- Aircraft time: 30,945 hours, 9,931 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Web
- Part number: 146A812325
- 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/ASAA2026042366001

## Discrepancy

AFT CARGO THRESHOLD CORRODED MARKED IN RED. GROUNDED - YES. BLENDED AWAY CORROSION ORIG. THICKNESS .056, MAT LOSS .036 NEW THICKNESS .020 WEB OUT OF LIMITS PER B737-900 SRM 53-60-15. LOCATED AND DRILLED NEW WEB P#146A8173-25 PER B737-900 SRM 51-40-05. INSTALLED NEW WEB PER B737-900 SRM 51-40-02 REF BOEING DWG 146A8340 REV.-PO#1145450.1.

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