Service difficulty report · Solenoid · Snias AS350B3

Difficulty date
June 7, 2006
Submitted
June 7, 2006
Operation
General aviation
Filed by
RX8R084N
Amentum Services Inc
Aircraft
N578AE
Make and model
Snias AS350B3
Aircraft serial
3716
Aircraft time
629 hours, 2,365 cycles
Engine
Tmeca ARRIEL2B
Engine time
629 hours, 654 cycles
System (JASC)
7603 · Power Lever
Part
Solenoid
Part number
L810BQ54
Condition
Defective
Location
Throttle Sys
Stage of operation
IN
How discovered
C
Nature of condition
O
Precautionary procedure
K

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

What was found

TWIST GRIP SOLENOID DOES NOT STAY IN THE MANUAL MODE POSITION (RETRACTED) WHEN MANUAL MODE IS SELECTED. AFTER APPROXIMATELY 5 MINUTES SOLENOID WILL GRADUALLY EXTEND, LOCKING THE TWIST GRIP IN THE AUTO POSITION AS THE SOLENOID HEATS UP FROM USE. THIS COULD CREATE A BIG PROBLEM IN AN EMERGENCY SITUATION WHERE THE PILOT SELECTS MANUAL MODE FOR CONTROL OF TWIST GRIP FOR POWER AND WOULD NOT HAVE IT (AFTER APPROX 5 MINUTES) DUE TO SOLENOID LOCKING THE TWIST GRIP. NOTE: THIS PART WAS JUST INSTALLED, NEW.