Category Archives: F50 Troubleshooting

Holds Falcon 50 specific troubleshooting information

F50 N373RR

removed failed #1RTU. INSTALLED SERVICEABLE UNIT.

PARTS OFF: P/N.     S/N

REMOVED FAILED FCP AND INSTLLED REPAIRED UNIT.

PARTS OFF:  P/N 822-0353-02     S/N 166

PARTS ON:  P/N 822-0353-02     S/N

 

 

 

………………….N383RR 12 24 36………………..

 

Hrs 7931.3  Cyc 5385

1. STANDBY STATIC COVER SCRATCHES PAINT, FOAM IS MISSING, M.

 

2. LIGHTS:  L AVIONICS, L MASTER WARN., L MASTER CAUTION ASTRA73, #2 FUEL XFER, R MAP LIGHT,  ANN BELOW LEFT EGPWS, , FSB/NS ALL DA

 

3. SHIELD LIGHT POTENTIOMETER HAS DEAD SPOTS.

 

4. INVALID AC DB. TS MAINTENANCE COMPUTER, RELOAD ACDB.  PROLINE 4 EFIS SYSTEM WILL NOT ENTER TEST MODE.

 

5.  NO AURAL WARN, NO FIRE BELL, TRIM CLACKER, AP DISCONNECT TONE. CHECK TO BE SURE BOX IS PLUGGED IN. WORKS ONLY WHEN SPKR SELECTED ON AUDIO PANEL.

6. 0 CREW TEMP AMPLIFIER FAN NOT RUNNING.  SWAP WITH PAX FOR TROUBLESHOOTING.

7. FSB/NS ALL DARK. NS HAS NO CHIME.

 

 

8. LEFT E-EXIT LIGHTS DEAD

 

9. RIGHT E EXIT FLOUESCENT DEAD.

10. READING LIGHT FWD OF LEFT E EXIIT INOP.

11. VANITY MIRROR HANGS ON FWD DOOR. AFT MIRROR DOOR SLIDES DRAG.

12. LAV BACKREST BLOCKS MIRROR SWINGOUT DOOR.

 

13.  BULB MISSING AT R SIDE VSNITY

14. 1L SEAT NO FOR/AFT TRACK

 

15. FWD VIDEO SELECT INOP, ALWAYS DVD1, AFT VIDEO SELECT INOP, ALWAYS AIRSHOW.

 

16. COPILOTS SEAT LOCK PINS DO NOT LOCK SEAT IN POSITION, REFERENCE SB, AD.

 

17.  RH O2 MASK MISSING TEST BUTTON.

18. IR UNIVERSAL REMOTE FAILED, BATTERIES? REMOVE FROM AC?

19. 3L SEAT ENTERTAINMENT CONTROL FACE PLATE LOOSE, PHONE JACK LOOSE.

20. AFT LEFT AND RIGHT  FUEL SWINGDOWN PANEL DAMAGED BY FLAP FAIRING

21. NOSE TAXI LIGHT MOUNTED OUTSIDE OF BRACKETS, CAUSED TEARS IN RIGHT SIDE NOSE GEAR DOOR SEAL.

 

22. LNLG LATERAL DOOR BONDING STRAP BROKEN

 

23.  RED RUST ON BELLY PANEL HARDWARE ADJACENT TO WING L.E.

24. LEFT WING ROOT FUEL DRAIN WEEPS.

25. RH WHEEL WELL BOLT MISSING ON FWD UPPER TIRE BURST SHIELD

 

26. GRIME COATS ALL THREE LOWER STRUT BARRELS.

27. LEFT FLAP CANOE DRAGS and scratches FLAP  TRACK, SCRATCHING NOISE WHEN FLAP IS EXTENDING. CANOE RIDES ON TRACK FOR THE LAST 1 INCH OF TRAVEL.

 

28. LH RTU  DISPLAYS ATC MODE A CODE, RH RTU DISPLAYS FLIGHT ID.  TEST BOTH DURING FAR CHECKS.

29. PILOT RIGHT RUDDER PEDAL PLASTIC NOT GLUED.

30.  CHECK ECTM, MEMORY FULL.  DOWNLOAD DEECS WHILE ENGINE COWLS ARE OFF?

31.  COPILOT SIDE WINDOW SUNSCREEN UNGLUED AT THE TOP.

 

32.   LISTEN TO AUDIO QUALITY AT CABIN P.A. WHEN HAND MICS IN USE.

 

35. PILOT AND COPILOT EXTENDED SUN SCREEN HAVE NO TRAVEL STOPS.  THEY EASILY PULL FREE FROM THE TRACKS.

 

36. 3RD CREW SEAT NO LATERAL TRACK.

 

37. LEFT WINGTIP STATIC WICK BENT, ALLEN SCREW MISSING?

 

38.  SCREW FWD OF LEFT INBOARD GEAR DOOR SHANKED.

39. SURFACE CORROSION AT RH WINGTIP COMPASS ACCESS DOOR.

40.  LEFT E EXIT SIGN INOP.  NO POWER AT THE WIRES CONNECTED TO PLACARD.

 

41 MAP LIGHT FWD OF LEFT E EXIT BULB HAS BEEN REMOVED.  ADJACENT LIGHT HAS GE305 BULB INSTALLED, SEEMS TOO LONG.

42. NOSE RADOME BOOTY IS ERODED ALL THE WAY TO THE PAINT+ PAINT HAS CRACKS

 

43. Lh aileron SURFACE CORROSION

44. EMERG LIGHT BATTERIES DUE.

LEFT FWD: P/N 60/2505-5 S/N 977

LEFT AFT. P/N D743-02-001 S/N 4370/06-2013

 

RIGHT AFT. P/N D743-02-001 S/N 4368/06-2013

47.  ONE SCREW MISSING AT ANNUNCIATOR PANEL.

48.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When is the friction check due on a Falcon 50 H stab

 

For F50 N98DH, the fwd H-Stab, (Normal) motor is P/N 1234-2, S/N 206, monted on Stab Jack P/N 021121-09.    S/N 332.

 

Normla motor is p/n 1234-2

 

That means the stab jack is compliant with SB F50-267, and SB F50-247.

So, brake current check and instpect and clean are not due at the 12 month check.

 

Here is some of the early analysis.

PRE SB

you have Stab Jack P/N 021121-01 or 021121-05 or 021121-05 AND Normal motor P/N 1234.

Brake holding check and Check is due at the 12 month AND check and clean is due at the 12 month.

 

POST-SB 147

 

you have any stab jack with stab normal motor p/n 1234-1.Drop out current check  is not required. inspectand clean  is due at every 12 month check.

 

POST S/B F50-267

you have any P/N 021121-09 stab jack, with normal motor 1234-2,  Check and cleaning not required, drop out current not required.

F50 items N98DH

pilot report.

HRS 9950.3

CYC  5311

Yellow HDG miscompare at rotate, and sometimes descent.  Both HDG seem identical, even when HDG CMPRTR warn is present.  Verfied. Rplced #1 ahrs.

#2 AHRS CB pops. Previous troubleshooting found a grounded , burned in two, power wire near fwd RH card cage in the nose. Possibly verified.  Slave control free switch contact burned.  Smoke evedence. (Picture). Repaired wire.

 

Repaired wire at #2 AHRS slaving control panel switch.  #2 AHRS system ops test good I.A.W AMM 34-21-00710

 

Pilot and copilot tx sidetone very loud, cabin sidetone, ics sidetone normal.  Verfied.

 

Adjusted pilot  Audio control box P/N M1045-fbaa-hj7f S/N 9010358, and copilot s/n ,  headphone level, speaker sidetone level, ICS level, and ICS sidetone level I.A.W. AMM 23-50-01-820-801.  Crew ICS system ops checks normal.

 

Ectm 1, needs  download

Number 2 RMI flag flickers into view.  Troubleshot by AHRS swap and STIM. Failure is now pilot RMI.   order AHRS collins AHC85E, P/N 622-6190-204 , failed S/N 726( causes RMI flag to flicker into view.

AHRS swap detail: Units are now swapped to:

#1 unit, Aft. P/N.622-6190-204    S/N 957

#2 unit, Fwd. P/N.622-6190-204    S/N 726 (causes RMI flag to come in view)

Removed failed AHRS computer #1.  Installed overhauled unit.  Unit recieved on Duncan W/O 4K0Y6,  from Regional Avionics Repair WO.    2020-9726.

Parts off:   P/N. 622- 6190-204. S/N 726. (Causes HDG flag to flicker)

Parts on:   P/N. 622- 6190-204. S/N 866.

Unit installed I.A.W. AMM 34-22-01-900-801.  AHRS system #1 ops checks normal.

P.brake bleed down.  Needs troubleshooting.

TERRAIN DISPLAY button inop.

Lh main brace leak, needs troubleshooting.

2 hyd pump bad,2000 psi replace pump. done.

Busstied ann  and other anns , needs bulb.

Crew temp valve resistor dead, passenger has rough spots near full cold. Needs crew dual temp valve.

Wednesday early am.  L ahrs displayfail with original in aft postion, and rh rmi flag in view. R rmi card shakes. Center MFD shows red DRV. This ended up being….AHRS will not STIM with STBY battery breakers in.

 

MFD Red DRV is a problem.  Rerack MFD solved this.

No ALIGN light on MSU.  Replaced with serviceable.

Parts Off.

MSU p/n CG1042AB03. S/N 1084 (align light inop)

 

Parts on:

MSU p/n CG1042AB03. S/N 461 (removed from inservice aircraft, see Pollard Spares LLC  SO5857.  Init ops test good refrence AMM 34-21-00-710-801

 

 

 

 

 

Ann bulbs

#2 hyd qty

Panels at pylon

Window seal

Cabin floor.

Low fuel light

Number 1 dme ind dead.

Left closet avionics fan loud

Terrain display inop.

Why is number 2 dpu 622-9009-001, #1 is -002

 

?——————————–

Week starking June 9

New items:

Left pylon leak

Aft compartment leak

Skin temp thetmostat at rh wheelwell not bonded.

Air check valve left side f4 tape

dv window has jumped the rack and pinion, needs reseal.

#1 and 2 mlg tire condition.

Fuel sample bottle clip brocken.

BATT 1 amps blue lamp inop.

Pilot and copilot window shades need rewind, small glue repair.

Low fuel light on

Hyd qty low

Number 2 transfer light will not go out.

Red CABIN light  rigged on the edge,

MED overserviced, upper fwd seal area gap., fwd side mid to fwd upper corner.  Check rigging also.

 

Dv window jumped off teeth, check stripped bolt.

 

No terrain display.

Ectm 1

 

 

 

 

Pilot reports 30 degree heading split.

98dh left alpha, then 13

Copilot seat no springback in seat lock. Also rocks for/aft

IRU will sometime start with FAN FAIL.

 

 

 

 

July 20, 2020

 

How could the heat ducts become clogged in a Falcon 50?

 

The foam inside the ducts has deteriorated and fallen onto the outlet registers at the carpet level.

foam20161216_153910

loosefoamf50022heatduct

blocked20161214_100113

 

 

Foam released from some areas inside the ducts

161216_152952

Dime size chunks completely covered some outlets

161216_153140

Smaller pieces

161216_153423

Bosrescope in duct

 

Possibly the situation was made worse because earlier in the year, the airplane had lost a APU seal and put oil residue in the entire condition system. this may have caused the foam to finally release.

 

There is foam sheet mufflers on each register, drilled t match the holes in the register.  Also deteriorated,  but that did not seem to be the worsen problem.

 

the small pieces of loose foam was blown toward the registers, and completely covered a few of them.

 

We used a vacuum and a bore scope to clean out the ducts.

the rest of my notes are here

Why would a Falcon 50 Passenger temp run away from HOT in AUTO mode