SDR CA130311022

Service difficulty report · Downlock Switch · Piper PA31

Difficulty date: March 7, 2013
Submitted: September 14, 2015
Operation: General aviation
Make and model: Piper PA31
Aircraft time: 17,737 hours
Engine: Lyc TIO540A2B
Propeller: Hartzl HCE3YR2A
System (JASC): 3230 · Landing Gear Retraction/Extension System
Part: Downlock Switch
Condition: Unknown
Location: Mlg
Stage of operation: AP
How discovered: O
Nature of condition: P
Precautionary procedure: O

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

What was found

(CAN) ON SELECTING GEAR DOWN FOR LANDING, LT MAIN GEAR DOWN SAFE GREEN LIGHT DID NOT ILLUMINATE. CONFIRMED LAMP OK. CYCLED GEAR, SAME RESULT. ON LANDING, LIGHT ILLUMINATED. INSPECTED, NO FAULT FOUND. SUSPECT DOWN LOCK SWITCH. SWITCHES REPLACED, BOTH SIDES.

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