Holds Falcon 50 specific troubleshooting information
1. Copilot D-bar dissappear intermitantly when LNAV selected, even though AP steers correctly
2. Copilot ALTSEL mode erratic.
3. FD FAIL when VPATH blue button is illuminated.
Verfied copilot ALTSEL mode would activate, even when FD was not displayed. Reacts to harness being manipulated aft and below FGC 2. drill swarf in harness.
Falcon 50. FZ-500
Floor board screws are
NAS517V4-8XA OR -8XF
Older falcon number is F50B201505079
Bistable relay contacts resistance
The comparitor circuit exists in both DPU and the MPU.
They communicate about errors
Falcon 50 EFIS 86 comparator and heading
EFIS-86A
EFIS-86C
In a falcon 50, or 200 used DPU-86C
622-7248-001, or -002 after mod
Manual for EFIS-86(1) is
EFIS-86(3) or (13) usses DPU-86L
EFIS-86 (4) or (14) uses DPU MPU86R
In a low SN 50
622-9009-001 or -002 after mod. Is this what gives names on waypoints on MFD?
EFIS-86E
Possible manual
https://gsplanestuff.com/products/collins-efis-86c1-install-manual-using-dpu-86c-mpu-86c
Possible manual
https://www.ebay.com/itm/183819877377?hash=item2acc84bc01:g:43YAAOSwLGVc5DJM#shpCntId
Why take time to remove the upper slat panels during a aileron linkage grease job:
Black mold, and black Vegi-Mite grease.
Half of the linear bearings are difficult to access from the bottom. So they tend to be ignored.
Best to take the time, remove the upper panels and do a though job.
Target the gear to get WOW
Disconnect the down brace prox (2 on each) to get GEAR NOT DOWN.
Disconnect RA RECV coax cable to get RA 2500 FT.
observe RA 2500 FT on the ADI
Select FID on TXP