# SDR VNAA202509030006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 2025
- Submitted: May 9, 2025
- Operation: Air carrier
- Aircraft: [N639NN](https://openairdocs.org/aircraft/N639NN), registered now
- Make and model: Cndair CL6002D24
- Aircraft serial: 15409
- Aircraft time: 13,501 hours, 14,252 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Door Sill
- Part number: MM67035655003
- Condition: Corroded
- Location: Zone 200
- 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/VNAA202509030006

## Discrepancy

AFT CARGO DOOR SILL IS CORRODED FROM FS 1000 TO FS 1047. CORRECTIVE ACTION: REMOVED CORRODED DOOR SILL. REPLACED AFT CARGO DOOR SILL P/N MM670-35655-003 WITH NEW BETWEEN FS 1000 TO FS 1047 IAW CRJ 900 SRM 51-42-06-001-001-A01 AND 51-42-21-001-001-A01

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