# SDR CA050707005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 24, 2005
- Submitted: August 3, 2005
- Operation: General aviation
- Make and model: Kaman K-1200
- Registry model: [Kaman K-1200](https://openairdocs.org/model/kaman-aerospace-k-1200) (OpenAirDocs)
- Aircraft time: 3,081 hours
- Engine: Lyc T5317A
- System (JASC): [6220 · Main Rotor Head](https://openairdocs.org/jasc/6220)
- Part: Hub
- Part number: K913001003
- Condition: Worn
- Location: Main Rotor
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CA050707005

## Discrepancy

(CAN) DURING LAG PIN REPLACEMENT BLADE WAS REMOVED.  UPON REMOVAL OF BLADE HUB WAS INSPECTED AND THE PROBLEM WAS FOUND.  THE UPPER SURFACE OF THE LOWER HUB HALF KRON BEARING SURFACE WAS WORN THROUGH TO METAL IN APPROXIMATELY 1/5 OF ITS CIRCUMFERENCE.  NO INSPECTION CRITERIA WAS FOUND IN THE MM FOR THIS PARTICULAR INSTANCE SO HUB WAS RETIRED.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.