MN-FLT-OH-201
B-18 Page 7 of 22
Flight Crew Operations Manual Bulletin No. GOT-18 , Dated March 1, 2021 (continued)
Minimum Speed Reversion
The AFDS and A/T do not control to a speed which is less than minimum speed
for the current flap configuration. This speed is approximately 1.3 Vs. Minimum
speed, FMC speed, or selected speed, whichever is higher, becomes the AFS
commanded speed. If actual speed becomes equal to or slightly less than the
minimum speed, the underspeed limiting symbol appears in the MCP
IAS/MACH display, and if operating in the V/S mode or CWS P, the AFDS
reverts to LVL CHG. The AFDS will also revert to LVL CHG from VNAV PTH,
except when flying a level segment.
The AFS commands a speed 5 knots greater than minimum speed. Reaching a
speed 5 knots greater than minimum speed reactivates normal MCP speed
selection control. The AFDS commands nose down pitch to increase airspeed if
the thrust levers are not advanced. When actual speed becomes 5 knots greater
than minimum speed, the underspeed limiting symbol disappears.
The A/P disengages and the F/D command bars retract when in a LVL CHG
climb with a command speed equal to minimum speed and a minimum rate of
climb cannot be maintained without decelerating.
March 1, 2021
