Service difficulty report · Pressure Switch · Cessna 340A

Difficulty date
March 12, 2001
Submitted
April 6, 2001
Operation
Air carrier
Aircraft
N177VM
Make and model
Cessna 340A
Aircraft serial
340A0964
Engine
Cont TSIO520*
Part
Pressure Switch
Part number
94E423
Condition
Inoperative
Location
Heater
Part time
400 hours
Stage of operation
IN
How discovered
C
Nature of condition
L
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

FOUND COMBUSTION AIR PRESSURE SWITCH IN THE CLOSED POSITION WHEN HOOKED UP BETWEEN THE COMMON AND NORMAL OPEN TERMINALS WHEN NO PRESSURE WAS PRESENT. THIS IS THE NEW STYLE PRESSURE SWITCH, WHICH DOES NOT REQUIRE TESTING.

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