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 7)  GUN 051; step 6 - The 04 manual test starts by testing all lighted switches except the BARO switch. The MCDP commands the FCCs to do the MCP lighted switch test. The FCC turns on all lightswitches that are controlled by the FCCs. The MCDP then displays action message 04 PUSH OFF MCP LIGHTS and the operator pushes each MCP lightswitch. If the lightswitch pushed is functioning, the FCC senses that the switch has been pressed and sends a signal back to the MCP to turn that lightswitch off. If pressing the lightswitch does not cause the light to turn off, it is an indication that the lightswitch circuit is faulty. No fault message is displayed. The test advances to the next step when the FCC senses that all switches have been tested, or the YES/ADV switch is pressed.
 (18) GUN 001-050, 052-999; Ground Test - LRU - 04 MCP (Steps 6-12) (Fig. 18)
 (a) MCP Test Steps 6-12 Description
 1)  Test steps (6-20) are verified by the CPU automatically advancing to the next test step. The test does not advance if the CPU does not verify that the switch tested is in the correct position. To continue the test past a fault, the operator presses the YES/ADV switch. There is no fault message for unlighted switch tests.
 2)  Step 6 - Action message 04 SET CAPT F/D SW ON instructs the operator to position the captain's flight director switch to ON. The CPU monitors AIM label 356, word 6, bit 9 to be set to logic one. Bit 9 set to one indicates to the CPU that the captain's F/D switch is in the ON position. The CPU then advances to the next test step.
 3)  Step 7 - Action message 04 SET CAPT F/D SW OFF instructs the operator to switch off the captain's flight director switch. The CPU monitors AIM label 356, word 6, bit 9 to be set to zero. Bit 9 set to zero indicates to the CPU that the captain's flight director is turned off. The CPU advances to the next step.
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AUTOTHROTTLE HEADING FIRST OFFICER'S ARM SWITCH SELECT SWITCH FLIGHT DIRECTOR SWITCH

CAPTAIN'S FLIGHT
DIRECTOR SWITCH

STEP MCDP TEST REQUIREMENT  MESSAGE ACTION/INFORMATIVE  MESSAGE FAIL
 
7. PROVIDE ACTION MESSAGE AND ADVANCE TO NEXT STEP WHEN ON  04 SET CAPT 
STATE OF CAPT F/D SWITCH VERIFIED OR  F/D SW ON  1 
8. PROVIDE ACTION MESSAGE AND ADVANCE TO NEXT STEP WHEN OFF STATE OF CAPT F/D SWITCH VERIFIED OR  04 SET CAPT F/D SW OFF  1 
9. PROVIDE ACTION MESSAGE AND ADVANCE TO NEXT STEP WHEN ON STATE OF A/T SWITCH VERIFIED OR  04 SET A/T SW ARM  1 
10.PROVIDE ACTION MESSAGE AND ADVANCE TO NEXT STEP WHEN OFF STATE OF A/T SWITCH VERIFIED OR  04 SET A/T SW OFF  1 
11.PROVIDE ACTION MESSAGE AND ADVANCE TO NEXT STEP WHEN ON STATE OF HDG SEL SWITCH VERIFIED OR  04 HOLD DN HDG SEL SW  1 
12.PROVIDE ACTION MESSAGE AND ADVANCE TO NEXT STEP WHEN ON STATE OF F/O'S F/D SWITCH VERIFIED OR  04 SET F/O F/D SW ON  1 
13.PROVIDE ACTION MESSAGE AND ADVANCE TO NEXT STEP WHEN OFF STATE OF F/O'S F/D SWITCH VERIFIED OR  04 SET F/O F/D SW OFF  1 

ADVANCE TO NEXT STEP FOR YES/ADV
NO MESSAGE PROVIDED, TEST DOES NOT ADVANCE FOR FAULT CONDITON

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Ground Test - LRU - 04 MCP (Steps 7-13)
Figure 18 (Sheet 1)

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ADVANCE TO NEXT STEP FOR YES/ADV
NO MESSAGE PROVIDED, TEST DOES NOT ADVANCE FOR FAULT CONDITON

1
Ground Test - LRU - 04 MCP (Steps 6-12)
　
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