Service difficulty report · Plate · Cessna 425

Difficulty date
October 19, 2009
Submitted
December 1, 2009
Operation
General aviation
Make and model
Cessna 425
Aircraft time
6,429 hours
Engine
Pwa PT6A135A
Propeller
Mcauly 4HFR34C762
Part
Plate
Part number
595105223
Condition
Corroded
Location
Lt Nacelle
Part time
6,527 hours
Stage of operation
NR
How discovered
9
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

(CAN) DURING DISASSEMBLY OF THE LT NACELLE TO FACILITATE A SID PHASE 32 INSPECTION, IT WAS DISCOVERED THAT THE PLATE CONNECTING THE LT OUTBOARD TRUSS ASSEMBLY TO THE TOP OF THE LT WING SKIN WAS CORRODED. AFTER REMOVING THE CORROSION, THERE WERE PITS LEFT IN THE SURFACE THAT EXCEED 10% OF MATERIAL THICKNESS. PLATE WILL HAVE TO BE REPLACED. (TC 20091021007)

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