Lou……..

Only a Texan would take a picture of ice!

I ran he apu on f900 087 for 2 hours this morning configuring a satcom.

Light blowing snow……..In Texas!…….

This ice formed inside the inlet.

Is this a known deal?

Looks like if we had restarted the APU  it might have been a bad day at the airport.

___________________________________________________________________

Two more interesting factoids.

The engine shop ran a 900 ex for quite a long time the same morning .  It came in about 45 min after we took the picture.

It had exactly the same ice on the inlet screen. But it was only 1 inch long.

While shutting down the apu, I noticed engine 2 oil temp was 50 deg c.  I had not run engine two at all, and the oat was 15 deg f.

That sounded a little suspicious, so we climbed all over the no.2 engine doing another leak check.

Sure enough there was a crack in the flange of the fgfb72155500a2 venturi pipe.

It was filling the number 2 engine cowl with hot bleed air.  That probably added to the amount of snow that melted off of the cowl and ran down into the inlet.

Bizaar set of circumstances.

F900_Fuselage_-_APU_air_intake_-_Protection_against_fluid_ingestion_during_de-icing_procedure

well.  First of all,  forget the “auto” part of the temp system until BOTH Dual temp valve indicators  run PERFECTLY smooth.

Here is a video of the Crew valve with a dead spot on the pot.

Dont even worry about the amps or the temp sensors until you have that  straight.

cause a divergence in the performance data saved in the individual FMSs, causing problems

If you get a “Avionics Maint” white message:

You can ignore it.  Or you can go through a 1 YEAR hassle trying to get all of this stuff figured out..

Hart Aviation:

We build a Primus Data Loader, P-2000 Maintenance Access Unit, (Built to Honeywell Drawings). This unit was built for the roughly 19 Falcon 900’s that did not have built in data access ports. (See our web site under the Falcon 900 section near the end of the page) We have one on hand which sells for $4250.00.

F900ex S/N 028 the l42FV and R42FV are under the blank covers in the side consoles.

here is the written instructions:

F900EX Primus 2000 Download & Clear Procedures

MAU Drawing

MAU Drawing

What in the world is this?

com.merx.npoint.servlets-1

1 year

DLC

Old Notes on VQ-BYT

F900EX Avionics Download 2017-05-15

This is the MAU drawing fir Modified F900SN022

Here is the last action when Hugo worked on it:

P 210 321 8572
C 210 663 3163
E hsanchez@argogroupus.com

Here is the simple break-in to get the codes:

REMEMBER::::::

If you pull the breakers in the air as a matter of troubleshooting, the codes are lost!

If you land and power down airplane, the codes are lost!

If you are using this diagnostic on the ground after powerdown,  YOU ARE WASTING YOUR TIME!  It’s like giving a dog investment advise.  It’s not helpful, and it anoys the dog.

Here is the Spreadsheet that unwraps the Hex code to plain english…. or as plain english as a Honeywell engineer can make it.

This one runs under Libre Office:

SPZ-8000-Flight-Fault-Summary   .ods

This one runs under excel:

SPZ-8000 Flight Fault Summary

SPZ-8000-Flight-Fault-Summary – this one is from Augusta

I think these spreadsheets were written by Terry Markovich.  Genius that ran Duncan TEB back in the day. Super clever.

here is an example fault code

Plain Text trouble shooting book:

Falcon 900 DFZ TS Guide