Service difficulty report · Duct · Beech C90A

Difficulty date
November 3, 2003
Submitted
January 5, 2004
Operation
General aviation
Make and model
Beech C90A
Aircraft time
6,350 hours
Engine
Pwa PT6A21
Propeller
Hartzl HCB3TN3
Part
Duct
Part number
1099100299
Condition
Cracked
Location
Engine
Part time
14,618 cycles
Stage of operation
IN
How discovered
9
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

(CAN) CRACK DETECTED IN UPPER FORWARD AREA OF THE INLET DUCT EXTENDING FORWARD AND 1 AFT OF THE OUTBOARD RIVET ROW OF THE INLET LIP. THIS EXCEEDED THE SR-KA-00011 LIMITS, REQUIRING DUCT REPLACEMENT. WHEN DISASSEMBLING THE COWL FOR DUCT REPLACEMENT IT WAS NOTED THAT THE INLET ANTI-ICE TUBES WERE CRACKED WHERE THEY ATTACH TO THE INLET LIP (PN 109-910049-1) AND REQUIRED REPAIR BY WELDING BEFORE REASSEMBLY, SEE SRM 54-00-04, PG 201.

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