Service difficulty report · Rib · Cessna 402C

Difficulty date
May 5, 2022
Submitted
May 5, 2022
Operation
Air carrier
Aircraft
N36911
Make and model
Cessna 402C
Aircraft serial
402C0314
Aircraft time
40,000 hours, 40,266 cycles
Part
Rib
Part number
512215556
Condition
Cracked
Location
Zone 600
Part time
40,000 hours, 40,266 cycles
Stage of operation
IN
How discovered
V
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

WHILE PERFORMING THE SID 57-10-25 INSPECTION, THREE CRACKS WHERE IDENTIFIED IN THE RIGHT CLOSE-OUT RIB (P/N 5122155-56.) THESE CRACKS WERE FOUND ON THE FORWARD ROW OF AT THE REAR TRUNNION PLATE ATTACH POINT. THERE ARE 6 HI-LOK HOLES ALIGNED VERTICALLY IN THIS ROW OF FASTENERS. THE FIRST CRACK IS 1.75 INCHES LONG AND WAS FOUND ON THE THIRD HOLE FROM THE TOP IN THIS ROW. CRACK TWO IS 1.5 INCHES LONG AND WAS FOUND AT THE FOURTH HOLE IN THIS ROW. CRACK THREE IS .75 INCHES LONG AND WAS FOUND AT THE FIFTH HOLE IN THIS ROW. THESE CRACKS ARE SIMILAR IN FASHION TO PREVIOUS SDR SUBMISSIONS.

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