SDR CA011220004

Service difficulty report · Bungee Cylinder · Robsin R44

Difficulty date: December 19, 2001
Submitted: February 5, 2002
Operation: General aviation
Make and model: Robsin R44
System (JASC): 6700 · Rotorcraft Flight Control
Part: Bungee Cylinder
Condition: Failed
Location: Cyclic
Stage of operation: IN
How discovered: V
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

(CAN) DURING 100 HOUR INSPECTION, BOTH AFT BUNGEES WERE FOUND TO BE DISCONNECTED AT THE AFT PUSH PULL TUBE C121-9 AT THE C317-1 BELLCRANK.SUSPECT DISCONNECTION IS DUE TO COLD OPERATING ENVIRONMENT AT THIS TIME. LOCAL TEMPERATURES REACHED BELOW -25 DEGREES C. BUNGEE MATERIAL MAY STIFFEN WHEN COLD CAUSING A LOSS OF ELASTICITY AND ALLOWING FOR DISCONNECTION.NOTE THIS AIRCRAFT HAS THE UPDATED STYLE BUNGEE ATTACHMENT CLIP.