# SDR VNAA202508020009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 28, 2025
- Submitted: August 2, 2025
- Operation: Air carrier
- Aircraft: [N637NN](https://openairdocs.org/aircraft/N637NN), registered now
- Make and model: Cndair CL6002D24
- Aircraft serial: 15401
- Aircraft time: 10,824 hours, 11,493 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Part number: SH670320753SH670
- 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/VNAA202508020009

## Discrepancy

CORROSION ON INTERNAL STRUCTURE INTERCOSTALS BTW FS 349 - 364, S25L - 25R AT MAIN AVIONICS COMPARTMENT.   INTERCOSTALS BTW FS 349 -364, S26L - S26R AT MAIN AVIONICS COMPARTMENT  WERE EVALUATED OUT OF LIMITS PER SRM 53-21-23-101-003-A01 AND REPLACED PER  SRM 51-42-06-001-001-A01 AND CRJ900 SRM 51-42-21-001-001-A01. INTERNAL STRUCTURE INTERCOSTALS BTW FS 349 - FS 364 BTW S25L- S26L, AND S26R - S25R  WERE CLEANED AND NO CORROSION WAS FOUND IAW SRM 51-26-00-001-001-A01.

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