# SDR SWIA202164494

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 2021
- Submitted: February 21, 2022
- Operation: Air carrier
- Aircraft: [N771SK](https://openairdocs.org/aircraft/N771SK), registered now
- Make and model: Cndair CL6002C10
- Aircraft serial: 10244
- Aircraft time: 43,067 hours, 27,848 cycles
- System (JASC): [5313 · Fuselage Main, Longeron/Stringer](https://openairdocs.org/jasc/5313)
- Part: None
- Condition: Corroded
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/SWIA202164494

## Discrepancy

CORROSION ON PAX DOOR INTERCOSTAL AFT DD4.   (C CHECK RO 2/17/2022)   PAX DOOR INTERCOSTAL DD4 FROM FS338.96 TO FS347.25 HAS INTERGRANULAR CORROSION ON MORE THAN ONE ELEMENT. OUT OF LIMITS. REF REO 670-52-11-010 REV NC, DATED 2002-02-25 AND CRJ200 SRM 52-00-00 REMOVED CORRODED INTERCOSTAL AFT DD4 FROM FS338.96 TO FS347.25. REF CRJ700 SRM 51-42-06-001-001 A01. INSTALLED NEW REPLACEMENT INTERCOSTAL (P/N 601R31902-317A) AT DD4 AFT BETWEEN FS338.96 AND FS347.25 USING NEW FASTENERS. REF BOMBARDIER DWG# 601R31702 REV -N AND CRJ700 SRM 51-42-06-001-001 A01. LEAK CHECK GOOD. COMPLIED WITH TASK CARD 51-900-1002-SKY

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