# SDR HDNA201607240001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 22, 2016
- Submitted: July 25, 2016
- Operation: Air carrier
- Aircraft: [N575LF](https://openairdocs.org/aircraft/N575LF), registered now
- Make and model: Bolkms BK117C2
- Aircraft serial: 9114
- Aircraft time: 3,606 hours, 15,712 cycles
- System (JASC): [5302 · Rotorcraft Tail Boom](https://openairdocs.org/jasc/5302)
- Part: Spar
- Part number: 1173042303
- Condition: Cracked
- Location: Tailboom
- 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/HDNA201607240001

## Discrepancy

DURING INSPECTION,  FOUND A 3 INCH CRACK ON VERTICAL FIN SPAR PROPAGATING FROM LIGHTNING HOLE. REPAIRED IAW RDAS-AHI16_0246, REV IR, REPAIR SHEET AHI2016-0115, REV IR, AND 8110-3 AHI16-146.

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