Free pickup drop off 76078
Mark Patnode
2146976225
A and P , was IA.
All posts by Todd's Time
How can I troubleshoot a yaw damper on the ground?
Wiggle the wing test. One fellow rocking the wing tip. Yaw damper linear actuator responds. Rudder perfectly opposes each swing of the vertical fin
Copy this link for video:
https://youtube.com/shorts/HSCOv7yR17M?si=lkw_B7UvkRsMeXUN
Power up self test on F900, SPZ 8000. Video shows reaction with hydraulic power applied.
If no hydraulic power is applied, you can feel it in the rudder pedals. This one is particularly weak. The servo is possibly failed.
G-280 Service Bulletin 280-27-335
We elected to section and discarded the old 90 degree backshells. That allowed enough slack to define, repin, one wire
Falcon 50 w Proline 21 weak in left turns
if I had more time, I would have written a shorter letter……
Proline 21 servo drive walk-through
FCC block page519 
FC to servo page 535 
part of fcc 2page 535
Citation 3 test switch
G-IV LED Serial numbers
LEFT FWD OVERWING P/N TAE-128 S/N T02148
LEFT MID OVERWING P/N TAE-128 S/N T02111
LEFT AFT OVERWING P/N TAE-128 S/N T02113
RIGHT FWD OVERWING P/N TAE-128 S/N T02109
RIGHT MID OVERWING P/N TAE-128 S/N T02110
RIGHT AFT OVERWING P/N TAE-128 S/N T02112
LEFT SCAN LIGHT P/N TAE-0428-7 S/N T01153
RIGHT SCAN LIGHT P/N TAE-0428- 6 LOT LT21-243451
ring lugs
MS25036 then dash numbers for sizes
here is a chart
https://skygeek.com/aircraft-engine-parts/electrical/ring-terminals/?productListFilters=
Citation Avionics M2 break-in
https://youtube.com/shorts/I8lqHzN4Maw?si=8pw4UPWqFBaIGz3r
F50ex aileron q resistor on a o’scope
turned out to be as simple as a failed PC card in the MSC
https://youtube.com/shorts/5ILGpmW-zcc?si=An0FB0J_Sg2DRQSZ
F900EX Thrust Reverser will not open
Throttle lock works. Red TR UNLOCK annunciator works.
No green words in the n1 gage.
Pin 22 is 0V on ground, 28v when both mains in the air. all good.