# SDR CALA2026021313750

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 17, 2026
- Submitted: February 13, 2026
- Operation: Air carrier
- Aircraft: [N14731](https://openairdocs.org/aircraft/N14731), registered now
- Make and model: Boeing 737724
- Aircraft serial: 28799
- Aircraft time: 81,665 hours, 30,075 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Web
- Part number: 146A8120
- 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/CALA2026021313750

## Discrepancy

FOUND EXCESSIVE CORROSION ON THE AFT CARGO MAIN SILL WEB, BTW BS 794 & 847.  REMOVED, LOCATED, DRILLED, COUNTERSINK, APPLIED ALODINE, PRIMER, INSTALLED NUTPLATES, & INSTALLED A NEW MAIN SILL WEB IAW SRM 51-40-05-0G-0, SRM 51-40-08-0G-0, AMM 51-21-41-370-802, 51-21-72-370-801, 51-40-02-0G-0, AMM 20-60-07-913-801, & DWG 146A8120.

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