# SDR ASAA2025091861728

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 18, 2025
- Submitted: October 21, 2025
- Operation: Air carrier
- Aircraft: [N579AS](https://openairdocs.org/aircraft/N579AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35187
- Aircraft time: 66,572 hours, 19,991 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Part number: 143A7501187
- 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/ASAA2025091861728

## Discrepancy

FORWARD CARGO COMPARTMENT, LT SIDEPLATE CHANNEL HAS MULTIPLE AREAS OF CORROSION (LBL22, STA 500D - 500I). GROUNDED - YES. REMOVED & REPLACED FWD CARGO LH SIDEPLATE CHANNEL FROM STA 500B+10 500I IAW B737NG SRM 51-40-02 + BAC DWG 143A600 REV- ORIGINAL THICKNESS 0.040 MAT REMOVED 0.014 MAT REMAINING 0.026.

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