# SDR ASAA2023070344102

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 3, 2023
- Submitted: July 19, 2023
- Operation: Air carrier
- Aircraft: [N278AK](https://openairdocs.org/aircraft/N278AK), registered now
- Make and model: Boeing 737-900ER
- Registry model: [Boeing 737-900ER](https://openairdocs.org/model/boeing-737-900er) (OpenAirDocs)
- Aircraft serial: 44113
- Aircraft time: 20,230 hours, 6,500 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Web
- Part number: 143A812210
- Condition: Corroded
- Location: Unknown
- 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/ASAA2023070344102

## Discrepancy

FWD CARGO ENTRY THRESHOLD FLOOR WEB UPPER SURFACE HAS CORROSION NUMEROUS PLACE AS MARKED. (DOT ATTACH). GROUNDED - YES. REMOVED CORROSION, ORIG THICKNESS .045". REMOVED .016", REMAINING .029" FOUND TO BE OUT OF LIMITS IAW B737-900 SRM 53-30-15-1A-1. REMOVED DAMAGED WEB, LOCATED, DRILLED & COUNTERSUNK NEW WEB P/N: 143A8122-10 P.O.1064915.2 & INSTALLED IAW B737-900 SRM 51-40-02, SRM 51-40-05 & BAC DWG 143A8330 REV F. TOOL# T8224P CAL DUE: 01-03-2024 REMOVED DOT.

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