COMPASS TRANSFER DURING TO MODE WITH HDG SEL OPTION WILL CAUSE ROLL BAR OUT VIEW
NEITHER A/P IN CMD AND LRRA ATTITUDE < 800 FEET
F/D Roll Bar Bias TableFigure 21
A737-300/400/500MAINTENANCE MANUAL
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù.AIRPLANES WITH EFIS ú
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A
737-300/400/500MAINTENANCE MANUAL
(m)
Event 13 - Selected IRU magnetic heading is not valid.
(n)
Event 14 - Compass tranferred (Attitude or EFIS to Both on 2) without either A/P in CMD and both F/D on.
(o)
Event 15 - Attitude transferred (Attitude or EFIS to Both on 2) from the normal position without either A/P in CMD or both F/D on.
(p)
Event 16 - AC bus transferred from the normal position without either A/P in CMD and both F/D on. However, the CMD output is transferred to the uneffected system.
(q)
Event 17 - VHF NAV transferred from the normal position without either A/P in CMD and both F/D on.
(r)
Event 18 - The VHF Navigation System in autotune.
(s)
Event 19 - F/D Comparator produces Bar Bias when there is a 3° difference between the Captain's and the F/O's F/D commands for more than 3 seconds.
(3) The pitch bar bias Fig. 22, is used to bias the F/D bar out of view if information is confusing or not reliable. The matrix displays the events and associated mode that will generate pitch bar bias. The following provides an explanation of these events.
(a)
Event 1 - Flight director off.
(b)
Event 2 - Flight director on but a mode not selected.
(c)
Event 3 - A VOR frequency is tuned and the foreign A/P is in CMD with GS engaged.
(d)
Event 4 - Radio altimeter is not valid. A 2 second delay allows for short interrupts in the GS engage mode.
(e)
Event 5 - The GS is not valid. A one-second delay allows for short interrupts.
(f)
Event 6 - This condition specifies that the A/P is in a speed mode and the airplane should be gaining altitude but is not climbing and is approaching a stall.
(g)
Event 7 - This condition specifies that the A/P is engaged in a speed mode and should be descending but is not and at the same time exceeding the VMO/MMO limits.
(h)
Event 8 - The mode control panel is set for a higher altitude, however, the FMC command is V/S descent.
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MODE
EVENT MODE NO TO V/S ACQ ALT MCP HOLD ALT MCP LVL CHG SPD VNAV VN AV PA TH ENGA G/S GA
IAS MACH V/S ACQ ALT HOLD ALT
5. 4. 3. 2. 1. G/S NOT VALID (2 SEC) R/A NOT VALID (2 SEC DELAY G/S ONLY) SELECTED LCL VOR TUNED AND FGN CMD AND G/S ENGA F/D ON AND NO MODE SELECTED F/D OFF X X X X X X X X X X X X X X X X X X
10. 9. 8. 7. 6.FMC TARGET V/S NOT VALID MCP ALT DES AND FMC V/S CLB (0.5 SEC) MCP ALT CLB AND FMC V/S DESCENT (0.5 SEC) DES CMD AND VMO/MMO AND NOT DES AT MIN V/S AND NOT ON GRND (10 SEC) CLIMB CMD AND ALPHA WARN AND NOT CLIMBING AT MIN V/S AND NOT ON GRND (5 SEC) X X X X X X X X X
15. 14. 13. 12. 11. PITCH A/P GA AND NOT F/D GA FLARE VHF NAV XFR AND NEITHER A/P IN CMD AND BOTH F/D ON LCL AC BUS XFR AND NEITHER A/P IN CMD AND BOTH F/D ON IRU XFER/EFIS (BOTH ON 2) AND NEITHER A/P IN CMD BOTH F/D ON X X X X X X X
20. 19. 18. 17. 16. SELECTED IRU LONG ACCELERATION NOT VALID SELECTED IRU VERTICAL ACCELERATION NOT VALID SELECTED IRU PITCH ATTITUDE RATE NOT VALID SELECTED IRU ROLL ANGLE NOT VALID SELECTED IRU PITCH ANGLE NOT VALID X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
25. 24. 23. 22. 21. BARO CORRECTED ALTITUDE NOT VALID BARO UNCORRECTED ALTITUDE NOT VALID TAS NOT VALID STATIC PRESSURE NOT VALID SELECTED IRU VERTICAL SPEED NOT VALID X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X
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