SDR ERAA077890

Service difficulty report · Transmission · Bolkms BO105S

Difficulty date
January 10, 2002
Submitted
February 25, 2002
Operation
General aviation
Aircraft
N125EH
Make and model
Bolkms BO105S
Aircraft serial
S562
Aircraft time
13,192 hours
Part
Transmission
Part number
4638001001
Part serial
1326
Condition
Making Metal
Location
Main Rotor
Part time
4,923 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. HINGED SUPPORT BEARINGS FROZEN. ONE EACH SLIDING SLEEVE TO CONTROL LINK BRG MECHANICALLY DAMAGED. UPPER CENTER HOUSING SLIGHTLY CORRODED ONE PLANETARY AXLE BREAKING DOWN & ONE PLANETARY GEAR PITTED. ACTION TAKEN: DISASSEMBLED AS FAR AS NECESSARY FOR REPAIR. REPLACED ONE PLANETARY GEAR, ONE PLANETARY AXLE,ONE DOUBLE ROWED CAGE. REPLACED BOTH HINGED SUPPORT BRGS, ONE CONTROL LINK TO SLIDING SLEEVE BEARING. REPLACED LOCK PLATES, AND HARDWARE AS NECESSARY. REPAIRED I/A/W BO-105 REM 103 & M/M CHAPTER 41. COPY TO AEC.