# SDR ASAA2025092561975

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 25, 2025
- Submitted: November 4, 2025
- Operation: Air carrier
- Aircraft: [N626AS](https://openairdocs.org/aircraft/N626AS), registered now
- Make and model: Boeing 737790
- Aircraft serial: 30793
- Aircraft time: 73,350 hours, 39,161 cycles
- System (JASC): [5314 · Fuselage Main, Keel](https://openairdocs.org/jasc/5314)
- Part: Keelbeam
- Part number: 144A713420
- 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/ASAA2025092561975

## Discrepancy

KEEL BEAM FROM STA 540 TO STA 663 HAS NUMEROUS AREAS OF CORROSION ALL ALONG THE LOWER CHORD AS WELL AS THE LOWER 'WEB'. GROUNDED - YES. REMOVED CORROSION FOUND TO BE OUT OF LIMITS FROM STA 620 TO STA 663 IAW B737-700 SRM 53-00-12-1A-1. REPAIRED IAW B737-700 SRM 53-40-12-2R-1W=.750 O=.140 R=.119 L=1.00 D=.021.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.