EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. GUN 051 ú
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ú ú 04 Page 59 ú Dec 20/93
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A70686
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757 MAINTENANCE MANUAL
INDICATED AIRSPEED/MACH SELECT SWITCH
NO MESSAGE PROVIDED, TEST DOES NOT ADVANCE FOR FAULT CONDITION
Ground Test - LRU - 04 MCP (Steps 21-26)
Figure 20 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. GUN 001-050, 052-999 ú
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ú ú 04 Page 60 ú Dec 20/93
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MAINTENANCE MANUAL
6) Step 25 - Action message 04 TURN HDG CCW - DSPLY DEC? instructs the operator to rotate the heading display control counterclockwise, and verify that the display decreases in value.
7) Step 26 - Action message 04 TURN HDG CW DSPLY INC? instructs the operator to rotate the heading display control clockwise, and verify that the display increases in value.
(24) GUN 001-050, 052-999; Ground Test - LRU - 04 MCP (Steps 27-31) (Fig. 21)
(a) MCP Test Steps 27-31 Description
1) Step 27 - Action message 04 TURN VERT SPD UP - DSPLY INC? instructs the operator to rotate the vertical speed control toward UP and verify that the vertical speed display increases in value.
2) Step 28 - Action message 04 TURN VERT SPD DN - DSPLY DEC? instructs the operator to rotate the vertical speed control toward DN and verify that the vertical speed display decreases in value.
3) Step 29 - Action message 04 TURN ALT SEL CCW - DSPLY DEC? instructs the operator to rotate the altitude select control counterclockwise and verify that the altitude display decreases in value.
4) Step 30 - Action message 04 TURN ALT SEL CW - DSPLY INC? instructs the operator to rotate the altitude select control clockwise and verify that the altitude display increases in value.
5) Step 31 - Message 04 TEST COMPLETE is displayed when the 04 MCP test routine has ended. The completed test is exited and enters ground test select when either the YES/ADV or NO/SKIP switch is pressed. On entering the ground test select routine, the display shows the next ground test listed on the front panel.
(25) GUN 051; Ground Test - LRU - 04 MCP (Steps 25-29) (Fig. 21)
(a) MCP Test Steps 25-29 Description
1) Step 25 - Action message 04 TURN VERT SPD UP - DSPLY INC? instructs the operator to rotate the vertical speed control toward UP and verify that the vertical speed display increases in value.
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
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ALL ú ú 04 Page 61 ú May 28/01
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MAINTENANCE MANUAL
VERTICAL SPEED ALTITUDE SELECT CONTROL CONTROL
STEP MCDP TEST REQUIREMENT MESSAGE ACTION/INFORMATIVE MESSAGE
29. PROVIDE TEST COMPLETE MESSAGE 28. PROVIDE ACTION MESSAGE AND VERIFY DISPLAY INCREASES 27. PROVIDE ACTION MESSAGE AND VERIFY DISPLAY DECREASES 26. PROVIDE ACTION MESSAGE AND VERIFY DISPLAY DECREASES 25. PROVIDE ACTION MESSAGE AND VERIFY DISPLAY INCREASES CW-DSPLY INC? CCW-DSPLY DEC? DN-DSPLY DEC? UP-DSPLY INC? 04 TURN VERT SPD 04 TEST COMPLETE 04 TURN ALT SEL 04 TURN ALT SEL 04 TURN VERT SPD
ADVANCE TO NEXT STEP FOR YES/ADV
Ground Test - LRU - 04 MCP (Steps 25-29)
Figure 21 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. GUN 051 ú
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ú ú 04 Page 62 ú Dec 20/93
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D00942
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MAINTENANCE MANUAL
VERTICAL SPEED CONTROL
ALTITUDE SELECT CONTROL
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