(c)  
FCC Interlock - five pins are provided to prevent the utilization of FCC's with incompatible part numbers. Presently the interlock pins are only for the -109 and subsequent FCC's. Interlock protection to make sure other FCC dash numbers are not mixed is done in the FCC option 1.

 (d)  
FCC Option 1

 1)  Customer Option Pin 1 (pin P1B-A12 grounded) - When this pin is grounded, the -103 FCC cannot be used with subsequent dash number FCCs. Also, the Customer Option Pin 1 includes these functions: a) CHANGED BANK ANGLE LIMIT SPEED SCHEDULE: The bank
 angle limit speed schedule in the AUTO position is changed to give increased turn operation in the terminal area with airspeed between 200 and 250 knots.
 b)  CHANGED LOGIC FOR ENGINE-OUT INPUT: The operation of the engine-out logic during electrical power transfers is changed to prevent the command of nuisance V2 airspeed during F/D takeoff mode.
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A
757
MAINTENANCE MANUAL

BARRIER GROUND CONNECTIONS
1 = CONN TO GRD MCDP TEST
OPTION DESCRIPTION 0 = OPEN 56 READOUT
INSERT-PIN TO INSERT-PIN
FCC CONFIGURATION -PIN 1 A-A12 A-A11
0 PIN 2
-B12 -B11
0
04
PIN 3 -C12 -C11
1 PIN 4
B-A11 B-G8
0 PIN 5
-B11
-H8
0 FCC INTERLOCK -PIN 1
B-C11 B-J8
0 PIN 2
-F11 -K9
0
00PIN 3
-D12 -D15
0 PIN 4
-F12 -K7
0 PIN 5
-H12
-J15
0 FCC OPTION 1 CUSTOMER OPTION PIN 1
B-A12
B-B15
0 CUSTOMER OPTION PIN 2
-B12 -D15
1
06 CUSTOMER OPTION PIN 3
-C12
-E5
1 CUSTOMER OPTION PIN 4
-A13
-A14
0 CUSTOMER OPTION PIN 5
-B13
-B14
0 FCC OPTION 2 A/P MODE ENGAGE
B-A3 B-E4
1
G/S CAP INHIBIT -H13 -J14
0
37FULL TIME NO LAND
-K13
-K14
1 METHOD 2
-G13
-H14
0 AUTOLAND STATUS ANNUNCIATOR
-C8 -E8
0
LATERAL COMMAND ENGAGE -C10
-C14
1 FCC OPTION 3 CWS INHIBIT
B-J2 B-J4
1
FULL TIME F/D -D3 -K4
1
31 F/D AUTOMATIC ON
-A4 A-D4
1
ILS ANOM DLY -D4 B-H4
1
A/P ENGA TO/GA OPT -G1 A-G2
1
SYS ARCHITECTURE -H1
-H2
0 FCC OPTION 4 GS RELAY STATUS

B-G2 A-G4
0

16 (MAG)MAG/TRUE IN -H2 0 OR 1
18 (TRUE)-D7LOC RELAY STATUS B-G4
0
-G10EO A/L INHIBIT A-G8
0
-J10SINGLE SOURCE A/P -E10
1
PARITY (ODD)
THE SUM OF THE GROUNDED PINS

B-C13
B-F4
L = 0 OR 1 (TOGETHER WITH THE PARITY PIN)
C = 1 OR 0 MUST BE EQUAL TO AN ODD NUMBER.
R = 0 OR 1 YOU MUST GROUND THE PARITY PIN OR KEEP IT OPEN TO GET ODD PARITY.

FCC PIN CONFIGURATION (EXAMPLE)
4 CONNECTED TO MAG/TRUE HDG SWITCH ON P3-1 PANEL
THE PARITY SHOWS ON THE DISPLAY. IF THE PARITY IS INCORRECT, THE STATUS WILL BE SHOWN AS "ADD" OR "DEL" FOR THE ASSOCIATED CHANNEL.

3 FCC OPTION 4 GROUP NOT INCLUDED IN PARITY CHECK
ALL PIN CONNECTIONS AND "MCDP TEST 56 READOUT" VALUES ARE SHOWN AS AN EXAMPLE. FOR SPECIFIC VALUES FOR EACH AIRPLANE, REFER TO MCDP GROUND TEST 56 (FIM 22-00-04/101, FIG. 103).

FCC Program Pin Connections
Figure 6

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K26826
A

c) d) e) f)
g)
h)
i) j) k) l)
757
MAINTENANCE MANUAL

CHANGED TAKEOFF AND GO-AROUND CONTROL LAW: The takeoff and go-around control law is changed to give better airplane guidance when there is windshear.CHANGED HEADING SELECT CONTROL LAW: The heading select control law is changed to make the turn rate of the airplane better.CHANGED FLIGHT LEVEL CHANGE (FLCH) CONTROL LAW: The FLCH control law is changed to make the climb performance during flap retraction better.ADDED GLIDESLOPE ANOMALY ANNUNCIATION AND MAINTENANCE REPORTING: A glideslope anomaly detector and associated annunciation and maintenance reporting are added to decrease the risk of the autopilot track a disturbed glideslope beam.CHANGED LNAV AND VNAV MODE ARMING LOGIC: The mode select logic is changed so that LNAV and VNAV are not armed while in the go-around mode below 400 feed radio altitude so that pitch or roll errors do not add up before LNAV or VNAV engagement.CHANGED ALTITUDE CAPTURE LOGIC DURING TAKEOFF AND GO-AROUND: The altitude capture logic is changed to prevent altitude capture below 800 feet radio altitude during takeoff or go-around to prevent accidental altitude capture during windshear.CHANGED NOSE LET-DOWN LOGIC AT TOUCHDOWN: The nose let-down logic is changed to keep pitch-up at touchdown to a minimum when the speed brakes are extended.CHANGED FLIGHT MODE ANNUNCIATION: The flight mode annunciation is changed to remove ALPHA annunciations during FLCH and go-around modes.CHANGED GO-AROUND LOGIC: The go-around logic is changed to allow a transition from takeoff mode to go-around mode.ADDED F/D AUTO ON OPTION: A program pin is available which supplies flight director guidance by pilot operation of the takeoff/go-around switches if the flight director was not engaged before.
　
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