Service difficulty report · Exhaust Header · Cessna 421C

Difficulty date
May 4, 2001
Submitted
May 4, 2001
Operation
General aviation
Aircraft
N6867D
Make and model
Cessna 421C
Aircraft serial
421C1084
Aircraft time
3,474 hours
Engine
Cont GTSIO520N
Part
Exhaust Header
Part number
829415
Part serial
L1H410009
Condition
Defective
Location
Wastegate Flange
Part time
31 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

THIS UNIT IS MANUFACTURED IN TWO HALVES, WHERE THE UPPER & LOWER HALVES WELDED TOGETHER (AT THE WASTE GATE FLANGE) THERE IS A HOLE AT THE WELD AREA ON EACH SIDE. THE REPLACMENT PART HAS AN ADDITIONAL WELD IN THESE AREAS THAT ARE NOT PRESENT ON THE DEFECTIVE PART. IT APPEARS THAT THE MANUFACTURING PROCESSES (WELDING)WERE NOT COMPLETED BEFORE THIS PART LEFT THE MANUFACTURE. THIS DEFECT WAS FOUND WHILE C\W THE EXHAUST PRESSURE TEST REQUIRMENTS OF AD 2000-01-16.

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