SDR ERAA077891

Service difficulty report · Transmission · Bolkms BO105S

Difficulty date
January 15, 2002
Submitted
February 25, 2002
Operation
General aviation
Make and model
Bolkms BO105S
Part
Transmission
Part number
4638001007
Part serial
890
Condition
Making Metal
Location
Main Rotor
Part time
10,465 hours
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

TRANSMISSION IS MAKING METAL. ALL FOUR CONTROL ROD ASSY BRGS WORN BEYOND LIMITS. BOTH CENTROL LEVERS BRGS FROZEN. TWO CENTROL LEVER TO SLIDING SLEEVE BRGS FROZEN. TWO HINGED SUPPORT BRGS FROZEN. DUST SHIELD CLAMP RUSTED, TOP CASE TO OUTER CASE BOLTS MECHANICALLY DAMAGED. MAST ROLLER BEARING BREAKING DOWN. ROTOR MAST PITTED ON FLANGE & BORES. OIL COOLER BLOWER DRIVE BUSHING WORN. LT INPUT PINION BREAKING DOWN. RT INPUT PINION LUBRICATE TUBE HAS DAMAGED THREADS. RT INPUT PINION BREAKING DOWN. LT BEVEL GEAR BREAKING DOWN. LT INT SHAFT BRG MECHANICALLY DAMAGED. LT INT SHAFT ROLLER TRACK BREAKING DOWN. RT BEVEL GEAR BREAKING DOWN.