SDR CA090616011

Service difficulty report · Downlock Switch · Cessna 402CESSNA

Difficulty date: June 15, 2009
Submitted: August 3, 2009
Operation: General aviation
Make and model: Cessna 402CESSNA
Aircraft time: 13,348 hours
Engine: Cont TSIO520E
Propeller: Mcauly 3AF32C*
System (JASC): 3260 · Landing Gear Position and Warning
Part: Downlock Switch
Part number: S20884
Condition: Failed
Location: Mlg
Stage of operation: AP
How discovered: O
Nature of condition: N
Precautionary procedure: O

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

What was found

(CAN) PILOT REPORTED INTERMITTENT LT MAIN GEAR DOWNLOCK INDICATION, REPLACED BULB TO TROUBLESHOOT, PROBLEM NOT FIXED CONTACTED GROUND PERSONNEL AND MADE LOW PASSES TO ENSURE GEAR PROPERLY DOWN AND LOCKED. ON GROUND, DOWNLOCK INDICATION BEGAN TO WORK PROPERLY. TROUBLESHOOTING REVEALED FAULTY DOWNLOCK SWITCH, SWITCH REPLACED, RETRACTION TEST C/O.