SDR 20010213CW007

Service difficulty report · Switch · Piper PA31325

Difficulty date: January 23, 2001
Submitted: February 13, 2001
Operation: Air carrier
Aircraft: N62992
Make and model: Piper PA31325
Aircraft serial: 317712013
System (JASC): 2140 · Heating System
Part: Switch
Part number: 94E423
Part serial: A98020012
Condition: Malfunctioned
Location: Combust Heater
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

TROUBLE SHOOTING A MINOR HEATER PROBLEM, COMBUSTION AIR PRESSURE SWITCH WAS FOUND TO BE FAILED IN THE ON POSITION. CONSULTING WITH A HEATER OVERHAUL SHOP, BEING INFORMED THAT THIS SWITCH SHOULD FAIL ONLY IN THE OFF POSITION, THUS SHUTTING THE HEATER OFF. UNKNOWN HOW LONG THIS SWITCH HAS BEEN DEFECTIVE, AS HEATER WORKS NORMALLY BUT HAS NO SAFETY FACTOR.

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