# SDR HDNA20231214001

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 12, 2023
- Submitted: December 14, 2023
- Operation: Air carrier
- Aircraft: [N586WH](https://openairdocs.org/aircraft/N586WH), registered now
- Make and model: Urocop EC 135 P2
- Registry model: [Urocop EC 135 P2](https://openairdocs.org/model/eurocopter-deutschland-ec-135-p2) (OpenAirDocs)
- Aircraft serial: 1096
- Aircraft time: 3,730 hours, 11,991 cycles
- System (JASC): [6210 · Main Rotor Blades](https://openairdocs.org/jasc/6210)
- Part: Nut
- Part number: L621M1010225
- Part serial: NA
- Condition: Loose
- Location: Main Rotor Blade
- Part time: 7,675 hours
- Stage of operation: CR
- How discovered: O
- Nature of condition: E
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/HDNA20231214001

## Discrepancy

PILOT MADE A PRECAUTIONARY LANDING AFTER NOTING AN INCREASING MAIN ROTOR VIBRATION. AMTS DISCOVERED THE HARDWARE LOOSE SECURING THE YELLOW MRB S/N 3407 DAMPER STAY ASSEMBLY. DETAILED INSPECTION OF THE MRB AND AIRFRAME WAS PERFORMED AND ATTACHMENT HARDWARE WAS REPLACED. VIBRATION CHECK WAS PERFORMED UTILIZING APPLICABLE VIBRATION ANALYSIS INSTRUMENT.

---
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.