Service difficulty report · Switch · Piper PA42720

Difficulty date
June 12, 2000
Submitted
January 22, 2001
Operation
General aviation
Make and model
Piper PA42720
Aircraft time
5,927 hours
Engine
Pwa PT6A61
Part
Switch
Part number
7395603
Condition
Failed
Location
Extinguisher
Part time
5,222 hours
Stage of operation
CR
How discovered
O
Nature of condition
N
Precautionary procedure
E, F

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

What was found

(CAN) PILOT EXPERIENCED RIGHT ENGINE FIRE WARNING AND MASTER CAUTION ANNUCIATORS. ENGINE WAS SHUTDOWN BY CHECKLIST AND RE FIRE BOTTLE DISCHARGE SWITCH ACTIVATED. LANDING C/O UNEVENTFUL. MAINTENANCE DETERMINED ENGINE FIRE WARNING WAS FALSE AND THAT THE FIRE BOTTLE DID NOT DISCHARGE. INSPECTION REVEALED THE CONNECTOR HAD SEPARATED ON THE BACK OF THE FIRE EXTINGUISHER SWITCH ASSEMBLY. NO CAUSE OF THE FALSE FIRE WARNING COULD BE DETERMINED AS ALL PROBES TESTED IN SPEC. WIRING HARNESS INSPECTED SERVICEABLE AND GROUND RUNS SATISFACTORY. FIRE EXTINGUISHER SWITCH CONNECTOR ATTACHED AND SECURED. TEST FLIGHT C/O SATISFACTORY, AIRCRAFT RELEASED.

More about the Piper PA-42-720