Service difficulty report · Rib · Beech C90

Difficulty date
May 29, 2002
Submitted
July 3, 2002
Operation
Air carrier
Aircraft
N91TJ
Make and model
Beech C90
Aircraft serial
LJ744
Part
Rib
Part number
50610000487
Condition
Cracked
Location
Elevator
Part time
7,863 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

FOUND DURING PHASE INSPECTION: LT ELEVATOR HAD A CRACKED INBOARD RIB, RIB DOUBLER BRACKET, AND INBOARD MAIN SPAR FLANGE AT INBOARD 90 DEGREE BEND, ALL WHERE THE ELEVATOR TORQUE TUBE ATTACHES. CRACKS VARY IN LENGTH FROM 1.3 INCHES ON SPAR FLANGE TO 3.5 INCHES AROUND RIB CIRCUMFRENTIALLY FOLLOWING THE SHAPE OF THE TORQUE TUBE ATTACH CASTING.

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