Service difficulty report · Tube · Cessna 425

Difficulty date
March 7, 2002
Submitted
March 28, 2002
Operation
General aviation
Aircraft
N71HE
Make and model
Cessna 425
Aircraft serial
4250085
Part
Tube
Part number
CM36914
Condition
Melted
Location
Pneumatic Tube
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

RIGHT INSTRUMENT AIR PRESSURE WAS AT ZERO ON THE GROUND AND WOULD INCREASE AS CABIN PRESSURE INCREASED IN FLIGHT. FOUND PNEUMATIC SUPPLY LINE FROM COMMON TEE TO FORWARD PRESSURE BULKHEAD MELTED. REPLACED TUBING.

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