Service difficulty report · Bearing · Moravn Z242L

Difficulty date
August 28, 2002
Submitted
September 12, 2002
Operation
General aviation
Make and model
Moravn Z242L
Aircraft time
4,003 hours
Engine
Lyc AEIO360A1B6
Propeller
Muhbr MTV9*
Part
Bearing
Part number
A915B
Condition
Worn
Location
Prop Hub
Component
Propeller · Muhbr
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) T57006 PROPELLER REMOVED AT SCHEDULED 100 HOUR INSPECTION. DURING ROTATION OF PROP BY HAND AN OBJECT COULD BE HEARD TUMBLING AROUND INSIDE HUB. NOTE THAT JUST PRIOR TO REMOVAL OF THE PROP A REPORT WAS RECEIVED STATING THAT THE PROPELLER WOULD NOT RETAIN ITS SETTING AND WOULD KEEP UP BY 200 - 300 RPM . HUB BLADE BORES WORE ENOUGH FOR GREASE TO LEAK OUT OF PROP. BALL BEARING SEPARATORS WORE AND CAME OUT OF BEARINGS. BALLS WOULD THEN CONTACT EACH OTHER GIVING SOUND OF RATTLING.