Service difficulty report · Actuator · Dorner DO328100

Difficulty date
October 28, 2015
Submitted
October 28, 2015
Operation
General aviation
Aircraft
N307EF
Make and model
Dorner DO328100
Aircraft serial
3097
Aircraft time
21,651 hours, 22,861 cycles
Engine
Pwa PW119C
Engine time
20,867 hours, 19,833 cycles
Propeller
Hartzl HDE6C3B
Part
Actuator
Part number
84321
Part serial
03
Condition
Activated
Location
Zone 100
Part time
99,999 hours, 99,999 cycles
Component
Elevator Contro · 0
Component part number
0
Stage of operation
TO
How discovered
9
Nature of condition
O
Precautionary procedure
C

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

What was found

AIRCRAFT STICK PUSHER FAILED IN THE RETRACTED POSITION, ELEVATORS BEING HELD IN FULL NOSE DOWN DEFLECTION, AFTER BEING TESTED BY THE AIRCREW ON PREFLIGHT CHECKS. THE FAILURE WAS NOT DISCOVERED UNTIL THE ACFT WAS LINED UP AND CLEARED FOR TAKEOFF FROM RUNWAY 22. THE PIC NOTICED THAT HE COULD ONLY MOVE THE CONTROLS AFT APPROXIMATELY 1". TROUBLESHOOTING EFFORTS QUICKLY DETERMINED THAT THE STICK PUSHER ACTUATOR HAD FAILED IN THE RETRACTED POSITION AND EVEN WITH POWER OFF WAS STILL IN THE RETRACTED POSITION. THE MPD HAS 3 INSPECTIONS FOR THE STICK PUSHER. 2 ARE DUE AT 6000FH.