d) AIRPLANES WITH CONTROL WHEEL STEERING; CWS ENGAGE e) TEST BIT 1 - when the Maintenance Control and Display Panel (MCDP) is conducting a ground test (Ref 22-41-00)
(b) Roll Mode Annunciation
1) The FCC roll mode logic determines the following armed and engaged modes: a) LNAV Mode ARM - LNAV armed but not engaged b) LOC MODE ARM - Approach or localizer mode annunciate
and no backcourse, no localizer capture, and no roll mode fail c) ROLLOUT MODE ARM - Multichannel engaged, localizer captured, and rollout not engaged
d) GUN 001-050, 052-999; BACKCOURSE MODE ARM - Approach or localizer mode annunciate, backcourse selected, and no localizer capture or roll mode fail
e) LOC/NAV MODE ARM - LOC and LNAV modes armed f) TRACK HOLD MODE OPERATE - Takeoff arm and in air, or go
around mode arm g) HEADING HOLD MODE OPERATE - Heading hold selected h) HEADING SELECT MODE OPERATE - Heading select engaged i) LNAV MODE OPERATE - LNAV engaged j) LOC MODE OPERATE - Localizer capture, no backcourse
selected, and rollout disengaged
k) GUN 001-050, 052-999; BACKCOURSE MODE OPERATE - Localizer capture and backcourse selected
l) ROLLOUT MODE OPERATE - Rollout engaged
m) ATTITUDE HOLD MODE OPERATE - Takeoff arm and on ground,
or roll attitude arm n) TAKEOFF MODE OPERATE (ROLL) - Takeoff arm (roll) o) GO AROUND MODE OPERATE (ROLL) - Go around arm (roll)
(2) EADI Pitch Mode Annunciation Signals - Armed, Engaged, and Limit (Fig. 7)
(a) Armed and Engaged Modes
1) The FCC pitch mode logic determines the following armed and engaged modes: a) GS MODE ARM - The (GS) glide slope sensor must be valid
and approach mode armed. Also, the airplane must be in air with the flare mode disengaged, GS disengaged, and no pitch mode fail
b) FLARE MODE ARM - GS engaged, multichannel engaged, and
the flare mode disengaged c) VNAV MODE ARM - VNAV armed but not engaged d) TAKEOFF MODE OPERATE (PITCH) - Takeoff armed (limit
modes override this display) e) VERT SPD MODE OPERATE - Vertical speed armed f) VNAV MODE OPERATE - VNAV engaged
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EADI Pitch Mode Annunciation Signals - Armed, Engaged and Limit
Figure 7
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g) ALT HOLD MODE OPERATE - Valid only when ALT MODE OPERATE is not valid. Also, altitude hold must be armed with no vertical speed arm, or altitude select arm must be valid
h) SPD - Flight level change armed and Mach or IAS
selected on MCP (limit modes override this display) i) GS MODE OPERATE - Glide slope engaged j) FLARE OPERATE - Multichannel engaged and flare engaged k) ALT MODE OPERATE - Valid only when the delta altitude
command is greater than 10. Also, altitude hold must be armed with no vertical speed arm, or altitude select arm must be valid
l) GA MODE OPERATE (PITCH) - Go-around pitch arm (limit modes override this display)
(b) Limit Modes
1) When the pitch channel of the AFDS is controlling speed through use of the elevator, overspeed and minimum speed limits override the engaged mode. The normal annunciation is inhibited and the operating limit mode is displayed. The following limit modes are displayed: a) FLAP LIMIT b) SPD LIMIT OPER - Maximum operating airspeed or Mach
limit
(3) AFCS Autoland Status Annunciator Signal Development and Control (Fig. 8)
(a) General
1) GUN 001-050, 052-999; Each FCC independently determines its own autoland status. Through cross-channel data transfer, the FCCs determine the proper display. Only one display output is possible unless a NO LAND 3 condition occurs. Both the NO LAND 3 and the NO LAND 2 displays will be shown during multi-channel approach. In decreasing order of autoland capability, the displays are LAND 3, NO LAND 3, LAND 2, and NO AUTOLAND.
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