All posts by Todd Phone


Egpws  audio

120v open ground …. Noted plug p2 at Avionics Innovations converter at fwd rh ee bay only required 2 turns to remove. Secured plug. Verified that neutral side of each out connects to P3 , pin E of converter. No airframe ground is present in that circuit. Noted bombardier diagram TM452425-12 agrees with that. Verfied with Tom at Avionics Innovations that pin E should not hard ground in this installation.
Converter pn 1.002.0102.1600 sn HE000075. Mod -.

Rig throttle 104
114 aft en bay light
122 fdr
123 cvr ping

Copilot master warn bulbs. 387
Cabin downwash sw guts.
Airshow controller.
Cabin speakers.
Vip cabin call sticks on.
Pilot side rail flood.
Pilot map light.

Thursday 1030 am 3.0 pm
Friday 8.00am to 5.00

F50 ops tests for 4A check


Pressure bump on takeoff. Verified on ground.

Flap assym left side has 1.7 inches displacement. Vrrified.

Crew temp needle stuck cold. Verified.

Elt fails selftest. Short chirp after 16 seconds.

Large screws at pilot overhead stripped. Heads are too large. Overlay is becomi b get damaged

Pedistal. Brush.clean
Yokes. Black touch up.
Lower eied screen
Cb panel cover. Clean
On ann panel…. fire test label is missing
Center qty reads slightly low. R fuel reads slightly high

How do the carbon brakes age on a F900?

(these numbers were from Spring 2014 on bmb)

Warn Pack = 3.621
Shim = approx .45
Pin =  .354 below

Total pack is 4.92
Total wear before Shim is 1 inch.

Shim adds .45

Total life is 1.45

2000 landings

.000725 inch per landing.

29 dollars per landings per brake.




try this for the whole document


This was from June 13, 2014, prior to the installation of shim in 1 and 4, and a new brake on 2


F900 gotcha


Pitch feel light  – Trim out of range, no hydraulics applied

Habitual bleed control red meneco.  SOMETIMES associated with bleed 3 fail.  On low serial number 900ex….. always power up both a an b buda at once.

IRU slow flash after 10 seconds. – low battery.
IRU fast flash after 8 minutes. – initialize FMS again

Half of the Cabin overhead lights in the cabin off – switch near FSB/NS


No Airspeed on T.O. – Bugs in pitot,

Black Pitot Masts –   Pilot heat on, , Service Letter about plating inside the mast.

Baggage door will not close.  – Cash Logic, Step switch bent.
Jacking ac with stby horizon – Pull Breakers, or disconnect proxes !!!!PRIOR!!! to jacking.

Service ladder aft compartment is scalding hot after extended ground run.  Close cabin door and DV window during extended ground run.

Entry door cabin lights sw.

No logo lights. – when on jacks, they are a load shed item.

Baggage light inop.  – Let baggage door open quickly

NZ 2000 ACDB  after memory bat change – reload it, its in the nav data USB

NZ2000 hyperstart.

Nz2000 selected dual operates single – Fisrt thingbto try is crossload Custom DB.

Low fuel 2 light on early during fuel transfer.

Fuel 2 level light on early during flight.

Ail feel light  – Avionics Mater

Pitch feel light – Pitch Trim. Check that the box is seated in the rack.

Antiskid menelco resetable , water in Nose gear axel, one nose bearing tight.

Antiskid menelco not resetable.  Nose harness towing  disconnect

Antiskid fails to test on ground ITS ALWAYS SOMETHING IN THE NOSE GEAR.  almost always.

Antiskid fails test in air – Main gear tachs

Red antiskid occurs near the end of the flight – do not test AS while gear is in motion.

Fueling ok light will not illuminate – first questions: Courtesy Lights on the fuel doors?

Aircraft will not take fuel – STBY horizon test button? –  Full/Partial

Fresh water stinks -Use  Purogene

Fresh water will not take water.

Nose steering inop.
     Nose connector  in Nose Wheel well ceiling is very hard to snap.

Auto slat light – Avionics Master, WOW, 

GPU start causes dramatic electrical blackout. 

     Battery Red switches on. Normal Power selection first, aircraft voltage settles to 24v,

     then disconnect GPU.

Generators off line during Gpu start – Uh….OK.

1 engine generator offline during taxi out – Hot APU GCU runs a little high. Stop APU.

Turbo fan menelco turns red.

Water drips out of belly – Oopsie. cracked line at right hand cabin floor level

Switches in aft compartment has gooey hydraulic fluid – Uh….OK for old style , 1 inch diameter switches

Fitting in nose well has drips of hyd fluid – Roll Q swivel seals.

“AP unavailable wow” message – Uh….OK.

Wx FSTBY on ground – Push STAB button 4 times, ONLY for 880 radar. If you have a 870 radar, you have bigger problems.

Wing will not clean up using stby pump = Learn about Red Handle.

Flap CB. pops – Fishing reels get sticky.

Hyd pump growls after engine start- Collapsed intake line. Bleed return line.

Engine computer light slow flash DEEC events

MED lower step feels mushy – wrong hardware at handle pivot on door

MED pops on climb – Stops have grey smokey spots

MED Heavy – How long is the barrel on the counterbalance arm?

Nose cone pops on climb – sticky flapper actuator

Masks drop on climb – Condition switches

Splits on RVSM checks –  Rudder trim

R wing down trim required on long cold soak – Pre Mod airplane

Avionics Maint required – Cable and DLC software

Ail feel light – Avionics master

Can’t find entertainment breakers – 900Ex Aft Toilet RH wall
     900B – AFT baggage LH wall

St by pump light stuck on – Red  Handle out of position

Ail feel light on. Avionics masters.

Apu will not start –  WOW, Tie, green square button, 

Engine will not start. WOW, Tie, red sw

Engine 1 runs cool – HP VALVE

Have job/no have job switch – Wing Heat switch is UNFORGIVING

Engine 2 light on –  latches on S Duct door

Stby horizon battery will not test –  WOW, unbalanced battery pack.

No ITT rise on 1 engine – HP valve only on #1

Engine 2 light on momentarily when throttle is advanced  – Uh….OK on a B model

PRV test shows no it rise – don’t test PRV with APU air on.

No green lights on Airframe or engine 2 ground test –
     takes LOTS of power to get green lights.
     NEVER USE THE APU BLEED  to test heats.

Red cabin light stuck on. leather on MED upper hooks

Number 2 Engine start is much slower than 1 and 3 – Batt only start after 5 min of APU run.

1 gen light comes on and another red sw pops –
      Its not a GEN 1 problem

Landing lights pulse without warning – TCAS Auto feature

EFIS Test not available, engaged – Turn off MTRIM


Fuel flow digits do not react to the throttles – they indicate consumed fuel.

Long ground apu run results in:  #2 Deec Manual Mode, Warm Bat, Removable Step ladder scalding hot, APU Un-commanded Shutdown – MED and DV window  must be CLOSED for long ground runs.

Fire Test Causes APU shutdown – Troubleshoot APU FUNCTIONS circuit card

Intermittent BAG FIRE horn. 900ex only. The Stby horizon battery 2ND OUTPUT! Drives the test for the baggage smoke detector circuit.  It can be failed even when the stby horizon tests good.


MED Bump during climb – MED Stops are grey.

Loud clunk under pedestal as throttles are advanced –  #2 Brakes Dual Braking arming, normal. 

Nose cone bump during climb . Fan Valve

Singing at mid cabin – Sirenage, P.brake O’pressure valve bypassing

singing during cruise –
     Sirenage – apply wing heat and see if it changes
     Try rudder pedals, vertical stabilizer cuffs.

thumps during taxi – Nut on main gear

clanking noise from pedistal during taxi – nose door, normal.