SDR CA080510002

Service difficulty report · Bearing · Robsin R22BETAII

Difficulty date: January 2, 2008
Submitted: November 3, 2008
Operation: General aviation
Make and model: Robsin R22BETAII
System (JASC): 6220 · Main Rotor Head
Part: Bearing
Condition: Worn
Location: M/R Head
Part time: 2,169 hours
Component: Head · Robsin
Component part number: A1541
Stage of operation: IN
How discovered: V
Nature of condition: E
Precautionary procedure: K

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

What was found

(CAN) PILOT REPORTED A LATERAL VIBRATION HAD BEEN PROGRESSIVELY GETTING WORSE OVER THE PAST WEEK. UPON VISUAL INSP OF THE MAIN ROTOR HEAD THERE WAS A BLACK PASTE (SMOKING) AROUND ONE OF THE TEETER HINGE BEARINGS. AFTER REMOVING MAIN ROTOR HEAR IT WAS FOUND THAT THE THRUST WASHER HAD BEEN CHAFING THE OTBD FACE OF THE BEARING. THE MAIN ROTOR HEAD WAS REMOVED AND REPLACED WITH A SERVICABLE HEAD. (TC NR 20080510002)