# SDR ASAA2024111854702

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 18, 2024
- Submitted: December 20, 2024
- Operation: Air carrier
- Aircraft: [N435AS](https://openairdocs.org/aircraft/N435AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 43292
- Aircraft time: 41,551 hours, 12,981 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Web
- Part number: 146A8123U25
- 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/ASAA2024111854702

## Discrepancy

AFT CARGO THRESHOLD WEB HAS CORROSION. GROUNDED - YES. REMOVED CORROSION FROM WEB SILL. ORIGINAL THICKNESS .045 IAW B737-900 SRM 53-60-15-0I-1. MATERIAL LOSS OF .009. REMAINING IS .036. OUT OF LIMITS IAW B737-900 SRM 53-60-15-1A-1. REMOVED & REPLACED WEB SILL PN: 146A8123U25 PO:1107524.4 IAW BAC DWG 146A8120 REV:A.

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