# SDR HYIA20190724001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 24, 2019
- Submitted: July 24, 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, 34,215 cycles
- System (JASC): [5711 · Wing Spar](https://openairdocs.org/jasc/5711)
- Part: Spar Cap
- Part number: 512204123
- Condition: Corroded
- Location: Lt Wing
- Part time: 33,328 hours, 34,215 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/HYIA20190724001

## Discrepancy

DURING MAINTENANCE CORROSION WAS DISCOVERED ON THE LEFT HAND LOWER AFT SPAR CAP P/N: 5122041-23. THIS CORROSION IS LOCATED IN THE FORWARD RADIUS OF THE HORIZONTAL AND VERTICAL LEGS OF THE CAP AT APPROXIMATE LWS 228.71. THIS CORROSION HAS A DEPTH OF APPROXIMATELY .029 INCHES DEEP WHICH 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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