SDR ERAA097085

Service difficulty report · Transmission · Bolkms BO105C

Difficulty date
April 29, 2004
Submitted
September 7, 2004
Operation
Air carrier
Make and model
Bolkms BO105C
Part
Transmission
Part number
4638001004
Part serial
1105
Condition
Making Metal
Location
Main Rotor
Part time
10,580 hours
Stage of operation
NR
How discovered
9
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

FOUND UNACCEPTABLE AMOUNTS OF ALUMINUM, BRONZE AND METAL FLAKES IN OIL FILTER. BUSHINGS MISSING IN INTERMEDIATE SHAFT BOLT HOLE BORES. NO DRY LUBE ON BEVEL GEARS, BEVEL GEARS SWITCHED SIDES ON LAST O/H, LT PINION AND BEVEL GEAR SCRAPPED (TEETH BREAKING DOWN), LOWER HOUSING, INTERMEDIATE SHAFT BORES WORN AND WEAR STRIPPED, OIL PUMP HAD FOD DAMAGE, T/R OUTPUT SEAL LEAKING, RT OUTSIDE INT SHAFT BOLTS NOT SAFTIED. SLIPPING AND WEAR IN LOWER HOUSING CAUSED BY BUSHINGS MISSING IN INTERMEDIATE SHAFT BOLT HOLE BORES. REMOVED TOP CASE, CENTER CASE AND DISASSEMBLED LOWER CASE. BUILT UP NEW LOWER CASE ASSY. INSTALLING ONE EA NEW PINION AND BEVEL GEAR, REPAIRED, INS