SDR ERAA098191

Service difficulty report · Transmission · Bolkms BO105S

Difficulty date
September 24, 2004
Submitted
December 6, 2004
Operation
Air carrier
Aircraft
N293EH
Make and model
Bolkms BO105S
Aircraft serial
559
Aircraft time
8,903 hours
Part
Transmission
Part number
4638001007
Part serial
1316
Condition
Making Metal
Location
Main Rotor
Part time
6,524 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

TRANSMISSION MAKING METAL. LT PINION BREAKING DOWN, SPACER MECHANICAL DAMAGED RT PINION BREAKING DOWN, INT SHAFT ROLLER BEARING MECH DAMAGED ON INNER RACE, LT BEVEL GEAR, BREAKING DOWN. INT SHAFT BALL BEARING SCORED, ROTOR MAS BUSHING LINER DAMAGED, 5 EAQ PLANETARY AXLE BREAKING DOWN, 4 EA PLANETARY GEAR INNER RACE DAMAGED FROM METAL CONTAMINATION, 4 EA. ACTION TAKEN: DISASSEMBLED AS FAR AS NECESSARY; FOR REPAIR;. VISUALLY INSPECTED PARTS. REPLACED PARTS WORN CORRODED OR MECH DAMAGED BEYOND LIMITS. ADJUSTED ALL BACKLASHES, DISTANCES AND PATTERNS. REASSEMBLED WITH NEW O-RINGS, PROSEALED AND PAINTED. C/W 600 HOUR CLUTCH INSPECTION ON BOTH CLUTCHES. REPAIRED IAW REM 109 AND MM CHAPTER.