# SDR AK62004F00002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 14, 2003
- Submitted: September 28, 2004
- Operation: Air carrier
- Aircraft: [N777TS](https://openairdocs.org/aircraft/N777TS), registered now
- Make and model: Cessna 421B
- Registry model: [Cessna 421B](https://openairdocs.org/model/cessna-421b) (OpenAirDocs)
- Aircraft serial: 421B0352
- Engine: Cont GTSIO520H
- System (JASC): [5711 · Wing Spar](https://openairdocs.org/jasc/5711)
- Part: Spar Cap
- Part number: 5022050201
- Condition: Corroded
- Location: Lt Wing
- Part time: 6,200 hours
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AK62004F00002

## Discrepancy

DURING AN ATTEMPT TO REPAIR CORROSION AROUND THE LT WING FLAP BELLCRANK, LOCATED IN THE EXHAUST GAS TRAIL ON LOWER SIDE OF WING.  DISCOVERED SEVERE INTERGRANULAR CORROSION ON LOWER SPAR CAP (JUST OB OF FACTORY SPLICE PLATE).

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