# SDR EVCA2013050900043

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 7, 2013
- Submitted: May 9, 2013
- Operation: Air carrier
- Aircraft: [N239AE](https://openairdocs.org/aircraft/N239AE), registered now
- Make and model: Bell 206L-1
- Registry model: [Bell 206L-1](https://openairdocs.org/model/bell-helicopter-textron-206l-1) (OpenAirDocs)
- Aircraft serial: 45367
- Aircraft time: 31,282 hours, 99,670 cycles
- System (JASC): [6510 · Tail Rotor Drive Shaft](https://openairdocs.org/jasc/6510)
- Part: Drive Shaft
- Part number: 206040365XXX
- Condition: Sheared
- 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/EVCA2013050900043

## Discrepancy

DURING A ROUTINE TAILROTOR GEARBOX CHANGE, WHILE COMPLETING THE TAILROTOR BALANCING PROCEDURES.  AFTER MX OBTAINED THE VIBRATION READING AT 100 PERCENT, THE PILOT DECELERATED THE ACFT TO FLIGHT IDLE AND APPROX 10 SECONDS INTO THE COOL DOWN PROCEDURES (AT FLIGHT IDLE) THE NR 2 TAILROTOR SEGEMENTED DRIVESHAFT FAILED AT THE CENTER OF THE DRIVESHAFT.

---
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.