Avionics Bending: AFCS Modes (Pinout)

Finished connecting the AFCS Modes displays to the relay boards. The AFCS MODES display is used to display the autopilot modes and to indicate state changes. For example from ALT ARM to ALT ... which indicates a change in autopilot state from altitude arm to altitude capture. I have a more detailed description of this instrument in several other blog postings such as: AFCS Training Manual Description, AFCS Modes Instrument Analysis and Localizer Capture Example. Here is what the instrument looks like:

And here is a short video of the instrument powered up and connected to the relay board backend. The instrument requires a power source between 24VDC and 28VDC and a 5VDC power source for instrument lighting. The individual flag solenoids are operated by pulling the respective pin to Ground.

The pinout below is for a an AFCS Modes panel used on an L-1011 with Thrust Management (TM). On AFCS Modes panels for L-1011s without TM, the THR MGT flag will simply say "TEST".

Pin	#	Pin Assignment	Value
A	32	Unused
B	31	Power	28VDC
C	30	A/L (W)	GND
D	29	A/L ARM (B)	GND
E	28	LOC (W)	GND
F	27	LOC ARM (B)	GND
G	26	GS (W)	GND
H	25	GS ARM (B)	GND
J	24	ALIGN (W)	GND
K	23	Instrument / Test Switch Ground	GND
L	22	ALIGN ARM (B)	GND
M	21	FLR ARM (B)	GND
N	20	VOR (W)	GND
P	19	THR MGT (W)	GND
R	18	Unused
S	17	Unused
T	16	Unused
U	15	Instrument Light
V	14	Instrument Light	GND
W	13	HDG SEL (W)	GND
X	12	TURB (W)	GND
Y	11	VS (W)	GND
Z	10	ALT (W)	GND
a	9	TO/GA (W)	GND
b	8	FLARE (W)	GND
c	7	ROLLOUT (W)	GND
d	6	VOR ARM (B)	GND
e	5	L NAV (W)	GND
f	4	ALT ARM (B)	GND
g	3	WINDSHR (W)	GND
h	2	IAS (W)	GND
j	1	VNAV (W)	GND