# SDR HYIA20170921002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 16, 2017
- Submitted: September 21, 2017
- Operation: Air carrier
- Aircraft: [N406GA](https://openairdocs.org/aircraft/N406GA), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0329
- Aircraft time: 35,963 hours, 35,220 cycles
- System (JASC): [5711 · Wing Spar](https://openairdocs.org/jasc/5711)
- Part: Spar Cap
- Part number: 512204122
- Condition: Corroded
- Location: Rt Wing
- Part time: 35,963 hours, 35,220 cycles
- 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/HYIA20170921002

## Discrepancy

CORROSION WAS DISCOVERED ON THE AFT LOWER OUTBOARD SPAR CAP.   CORROSION WAS FOUND AT RWS 107.21 TO 111.781 ON THE BOTTOM OF THE HORIZONTAL LEG OF THE CAP. DEEPER THAN THE ALLOWABLE LIMITS IAW MEB 91-11 R1, SECTION 3, ITEM B. THE SPAR CAP WAS REPLACED.

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