# SDR HYIA20190718001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 16, 2019
- Submitted: July 18, 2019
- Operation: Air carrier
- Aircraft: [N120PC](https://openairdocs.org/aircraft/N120PC), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: C4020079
- Aircraft time: 33,328 hours, 34,125 cycles
- System (JASC): [5711 · Wing Spar](https://openairdocs.org/jasc/5711)
- Part: Spar Cap
- Part number: 512204121
- Condition: Corroded
- Location: Lt Wing
- Part time: 33,328 hours, 34,125 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/HYIA20190718001

## Discrepancy

DURING MAINTENANCE AN AREA OF CORROSION WAS IDENTIFIED ON THE HORIZONTAL LEG OF THE LEFT HAND UPPER OUTBOARD SPAR CAP (P/N: 5122041-21). THIS CORROSION IS LOCATED AT APPROXIMATE LEFT WING STATION 197.71 AND MEASURES APPROXIMATELY .022 INCHES DEEP. THIS IS IN EXCESS OF THE MAXIMUM REMOVABLE LIMITS ALLOWED UNDER MEB95-11R1 SECTION 3. THIS CAP WILL BE REMOVED AND REPLACED USING NEW PARTS.

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