# SDR QMLA2011061911069

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 19, 2011
- Submitted: June 21, 2011
- Operation: Air carrier
- Aircraft: [N534LN](https://openairdocs.org/aircraft/N534LN), 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: 0453
- Aircraft time: 2,378 hours
- System (JASC): [6510 · Tail Rotor Drive Shaft](https://openairdocs.org/jasc/6510)
- Part: Bearing
- Part number: 552200
- Condition: Binding
- Location: Tail Rotor
- Part time: 2,378 hours, 7,631 cycles
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/QMLA2011061911069

## Discrepancy

DURING PRE FLIGHT, THE PILOT FOUND THAT WHEN HE TURNED THE TAIL ROTOR IN THE DIRECTION OF ROTATION HE HEARD A POPPING NOISE COMING FROM THE TAIL ROTOR DRIVE SHAFT.  UPON FURTHER INSPECTION FOUND THAT ONE OF THE BEARINGS THAT HOLDS THE TAIL ROTOR DRIVE SHAFT WAS BAD.

---
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.