Service difficulty report · Transmission · Boeing 234

Difficulty date
May 27, 2019
Submitted
May 30, 2019
Operation
Air carrier
Aircraft
N242CH
Make and model
Boeing 234
Aircraft serial
MJ023
Aircraft time
25,013 hours
Part
Transmission
Part number
234D22004
Part serial
A91519
Condition
Cracked
Location
Main Rotor
Part time
15,030 hours, 53,095 cycles
Stage of operation
IN
How discovered
V
Nature of condition
K
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING RAMP CHECK, NOTICED OIL LEAK ON TOP OF AFT XMSN. SUSPECTED AFT VERTICAL SHAFT OIL SEAL. UPON REMOVAL AND FURTHER INSPECTION OF THE AFT XMSN, FOUND FWD RT MOUNT LUG CRACKED. FOUND 1 CRACK BY VISUAL INSPECTION AND CONFIRMED BY STRIPPING PAINT ON UPPER HOUSING. CRACK MEASURES APPROX. 5" EXTENDING FROM THE TOP OF THE SLING ATTACHMENT LUG, EXTENDING TO THE LOWER UPPER HOUSING.

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