SDR CA111107004

Service difficulty report · Master Switch · Piper PA34200T

Difficulty date: November 1, 2011
Submitted: January 23, 2013
Operation: Air carrier
Make and model: Piper PA34200T
Aircraft time: 10,325 hours
Engine: Cont LTSIO360EB
Propeller: Hartzl BHCC2YF2
System (JASC): 2450 · AC Power Distribution System
Part: Master Switch
Part number: 587837
Condition: Unserviceable
Part time: 203 hours
Stage of operation: TX
How discovered: V
Nature of condition: H
Precautionary procedure: O

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

What was found

(CAN) MASTER SWITCH WILL NOT SHUTOFF WHEN SET TO OFF POSITION. SWITCH VERY DIFFICULT TO MOVE TO ON OR OFF POSITION. SWITCH R & R WITH NEW. SWITCH OPENED UP, FOUND WET AND CORRODED, SUSPECT CONDENSATION, NO EVIDENCE OF LEAKS ACFT KEPT IN DOORS.

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