# SDR 99ZZZX1592

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 29, 1999
- Submitted: March 26, 2000
- Operation: General aviation
- Make and model: Hiller UH-12
- Registry model: [Hiller UH-12](https://openairdocs.org/model/hiller-uh-12) (OpenAirDocs)
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Hub
- Part number: 5143711
- Condition: Cracked
- Location: Main Rotor
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX1592

## Discrepancy

DURING NDT INSPECTION, FOUND A CRACK IN THE HUB GOING DOWN 0.25 INCH FROM A STUD HOLE IN THE VERTIAL BORE.

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