OpenAirDocs.org

SDR 2001FA0000173

Open the Markdown

Service difficulty report · Drive Shaft · Robsin R22

FAA SDR system

Difficulty date
June 7, 2001
Submitted
August 8, 2001
Operation
General aviation
Make and model
Robsin R22
System (JASC)
6510 · Tail Rotor Drive Shaft
Part
Drive Shaft
Condition
Failed
Location
Tail Rotor
Stage of operation
TX
How discovered
O
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING RUN-UP PRIOR TO TAKE-OFF, AN R22 TAIL ROTOR DRIVE CUT LOOSE AND SEVERED THE TAIL BOOM. HELICOPTER WAS ABOUT TO FLY TO A MAINTENANCE FACILITY FOR 100 HOUR INSPECTION. PRELIMINARY SURVEY INDICATES THAT THE INCIDENT WAS INITIATED BY THE TAIL ROTOR DRIVE SHAFT DAMPER BREAKING OFF INSIDE THE TAIL BOOM. THIS ALLOWED THE DRIVE SHAFT TO WHIP, FRACTURE, AND CUT OFF THE TAIL BOOM.