Category Archives: AircraftTroubleshooting

F900 Troubleshooting

F900ex 022

 

 

One half of 1 meter on climate control panel illuminates. You can press on the left half of the face, and it will come and go.

 

 

 

Scratches at flap handle

 

Lower left overhead panel inop

 

Pressirization computer lower left side light spill

 

#1 RTU upper rh corner light spill.

 

Both audio panels minor light spill all edges

Light spill at #3 IRU

No illumination on any keys at any of the 3 FMS controll heads

Placard brocken at horn silence

 

 

 

 

 

 

 

 

 

 

 

 

F900 Troubleshooting

F900EX Generator traumas

This is an old presentation i set up.

I thinkmi cabbaged some stuff from flcon, and added some art.

Old Auxilec presentation:
AuxilecStarterGeneratorOld

Old notes:

Old troubleshooting notes on a long-legged problem: engines running:

  1.  Check for Bleed leak blowing on GCU.  BE very carefull if you elect to run the AI on the ground.  !!!!!!APU BLEED OFF!!!!!!, slats extended.    20 seconds ground test max. leave the slats out to cool.
  2.  Test “E” ground quality.  Fluke on volts.  Black lead to airframe ground, red lead to GCU Black test point.  Very small voltage~ .1v.  less is better
  3. Volt drop on line contractor.  Fluke meter on volts.  Red lead on upper contactor, bottom big bolt, black lead on same contactor, upper big bolt. Very small voltage~ .1v.  less is better.
  4. Ripple test.  use fluke MIN/MAX.

Run each test with only 1 gen online, 50 to 100 amps load, try to hold conditions quite similar for each test.

some other thoughts:
look at big E terminal, small 20awg terminal.

double check each  GCU voltage. Is it stable at 28.5? is it stable with load? is it stable with RPM change?

select cockpit red switch to off.  Is the voltage of a running generator, cockpit switch selected off,  .7v to 1.0v at idle? this checks the quality of the permanent magnets inside the Generator.

ASSURE that NO ENGINE GENERATOR  has a cooling fan installed. (possibly a borescope through the black sooty outlet.) or it mat be necessary to unbolt the cooling exhaust.

Initial problem definition:

#3 Gen Light occasionally, Much troubleshooting. Gen 3 amps tend toward zero. #1 seems to “take the load”

 

History:

#3 gen troubleshooting, #1, #3 gen shunts…..?Removed?

Detailed summary of troubleshooting:

Customer_Invoice_-_Work_Order-_13548-05-2021

 

 

 

 

AircraftTroubleshooting

Westwind pressurization problem

 

Overview

 

westwind pressurization

 

 

 

 

 

 

The valve opens correctly with shop air applied, and the controller  disconnected, and slight vacuum applied to control circuit

 

 

 

 

Front valve will open when control i connected straight to the pneumatic relay.

 

 

 

Ground prepress seems to work correctly

 

 

 

 

Aircraft pressurizes hard on the ground, straight to 3 psi at idle.  Fwd valve will not open via the controller.

 

Turns out the limit valve was failed.  It had opened because the pilots got the cabin to 17,000 feet.  Then the brass seat fell out of place.  Then valve leaked from then on .

 

 

 

 

Removed failed altitude limit valve PN 102466-1  SN 88-2322.  Installed serviceable valve received on form.   PN 102466-1   SN 17-1898

 

 

 

 

 

Removed failed anti-ice pressure reducing valve PN 38E59-1D  SN 2907 -U. Installed Ovrrhauled valve recieved on AVITECH W.O. 1021932 PN 38E59-1D  SN RF3502.