SDR CA011220003

Service difficulty report · Bungee Cylinder · Robsin R44

Difficulty date: December 18, 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: CR
How discovered: O
Nature of condition: O
Precautionary procedure: O

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

What was found

(CAN) PLIOT COMPLAINED OF HEAVY AFT CYCLIC FORCES.INVESTIGATION REVEALED CYCLIC BUNGEE TO BE DISCONNECTED FROM AFT ATTACH POINT ON PUSH ROD P/N C121-9 AT C317-1 BELLCRANK. SUSPECT DISCONNECTION IS DUE TO COLD OPERATING ENVIRONMENT AT THIS TIME. LOCAL TEMERATURES REACHED BELOW -25 DEGREES C.BUNGEE MATERIAL MAY STIFFEN WHEN COLD CAUSING A LOS OF ELASTICITY AND ALLOWING THE DISCONNECTION. THIS AIRCRAFT HAS THE UPDATED STYLE BUNGEE ATTACHMENT CLIP.