Service difficulty report · Casting · Beech 99

Difficulty date
December 20, 2001
Submitted
January 15, 2002
Operation
Air carrier
Aircraft
N4381Y
Make and model
Beech 99
Aircraft serial
U71
Engine
Pwa PT6A28
Part
Casting
Part number
504200337
Condition
Cracked
Location
Cockpit
Part time
36,595 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

DURING A DETAILED INSPECTION OF THE INTERIOR AND STRUCTURE, CRACKS WERE FOUND EXTENDING FROM THE RIVETS HOLDING UNTPLATES USED TO SECURE THE RUDDER CONTROL BELLCRANK PIVOT CASTING. FURTHER INSPECTION REVEALED NO OTHER DISCREPANCIES. BEAM WAS REPLACED WITH NEW BEAM. THIS WAS CAUSED BY THE ACCUMULATION OF MANY FLIGHT HOURS AND IS THE RESULT OF A PROPERLY PERFORMED INSPECTION.

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