SDR 97ZZZX3894

Service difficulty report · Rod · Snias AS350B2

Difficulty date
September 4, 1997
Submitted
March 26, 2000
Operation
General aviation
Aircraft
N6097Z
Make and model
Snias AS350B2
Aircraft serial
2820
Part
Rod
Part number
350A33214501
Condition
Worn
Location
T/R Pitch
Stage of operation
IN
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 A DAILY VISUAL INSPECTION, DISCOVERED THE BEARING IN THE OUTBOARD END OF THE TAIL ROTOR PITCH CHANGE ROD HAD ALMOST COMPLETELY SEPARATED FROM THE HOUSING. THE PILOT OF THE PREVIOUS FLIGHT DID NOT NOTICE ANY ABNORMALITIES IN THE OPERATION OF THE AIRCRAFT OR THE TAIL ROTOR CONTROL SYSTEM. IT APPEARS THE BEARING WAS ONE FLIGHT AWAY FROM A TOTAL FAILURE WHICH COULD HAVE RESULTED IN COMPLETE LOSS OF THE HELICOPTER AND ITS OCCUPANTS. NOTE: THIS IS THE SECOND SUCH FAILURE OF THIS PITCH CHANGE ROD BEARING EXPERIENCED BY THIS OPERATOR. THE FIRST FAILURE RESULTED IN AN CATASTROPHIC AIRCRAFT ACCIDENT.