# SDR HYIA20180104002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 3, 2019
- Submitted: January 4, 2019
- Operation: Air carrier
- Aircraft: [N409BK](https://openairdocs.org/aircraft/N409BK), registered now
- Make and model: Cessna 402C
- Registry model: [Cessna 402C](https://openairdocs.org/model/cessna-402c) (OpenAirDocs)
- Aircraft serial: 402C0651
- Aircraft time: 27,433 hours, 17,751 cycles
- System (JASC): [5711 · Wing Spar](https://openairdocs.org/jasc/5711)
- Part: Spar Cap
- Part number: 52111781
- Condition: Cracked
- Location: Wing
- Part time: 27,433 hours
- Stage of operation: IN
- How discovered: U
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HYIA20180104002

## Discrepancy

A CRACK WAS IDENTIFIED AT THE LT SIDE OF LWR FWD CARRYTHROUGH SPAR CAP, IB MOST AFT FASTENER HOLE WHILE PERFORMING NDT PROCEDURE AS AMOC FOR AD2018-03-03R1.  THE CRACK WAS CONFIRMED WITH BOLT HOLE EDDY CURRENT AFTER THE FASTENER WAS REMOVED.  WE BELIEVE THIS SPAR CAP/WING JOINT FITTING ASSEMBLY TO BE UNTOUCHED SINCE ORIGINAL ASSEMBLY BASED ON THE FASTENER STYLE INSTALLED, AFTT, AND RECORDS REVIEW.  THE CRACK IS NOT DETECTABLE WITH MAGNIFIED VISUAL INSPECTION.  THE SPAR CAP WILL BE REPLACED.

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