.  
PMS valid.

.  
Autothrottle engaged.

PERF Button.....................................................................................PUSH

Push the PERF button and observe autothrottle and pitch FMA’s display
PERF DES.
When transitioning to PERF DES mode and time to TOD vertical event is less than 5 minutes, armed altitude below current altitude and BOD definition has been completed.
Line Select Key 1 ..............................................................................PUSH

Push Line Select key 1 and observe VERTICAL ALERT light illuminated 15
seconds prior to TOD.
Note:  Descent begins at optimum point (distance and time to TOD = ZERO).
There are three descent modes available in PERF, DES (NON OPT), DES OPT and DES (V/S).
PMS maintain control of pitch and thrust in all modes.
Descent speed, BOD distance and BOD definition may be edited in all PERF DES mode except when trip data is not loaded.
If BOD distance is less than 200 NM with BOD defined relative to a VOR and the BOD VOR is tuned and being used for distance updates, attempts to edit BOD distance will not be accepted.
PMS will continue to compute a descent profile for defined conditions. Pitch and thrust commands (within limits of allowable speed and thrust) will be commanded by the PMS.
(Continued)
Continental
Rev. 12/01/00 #29  Flight Manual
When unplanned tailwinds are present, the trajectory of the airplane will tend to go long, and an ADD DRAG advisory message will be displayed based on the altitude / miss distance. Similarly, a REMOVE DRAG message will be displayed if the miss distance is negative and speedbrakes are extended.
If descent is interrupted by an intermediate clearance altitude, the PMS will transition to CRZ (NON OPT) at selected altitude.
DES (NON OPT)
This page is auto-selected during cruise after clearing DIST TO BOD? message. Without a lower altitude armed, ARM ALT? message will appear in scratchpad, and Line Select key 1 will be illuminated with alternate flashing of SPD and SEL in Data Line 1.
Note:  Descent speed will be default value unless changed by pilot.
This page will be displayed any time lower altitude is armed. However, Line Select key 1 will not be illuminated and SPD and SEL will not flash in Data Line 1 until 5 minutes from TOD.
Line Select Key 1 ..............................................................................PUSH

Push Line Select key 1 for automatic entry at TOD. Note: Page will again be displayed at 6 NM to TOD with a SELECT DES? message if mode has not been engaged as described. To initiate a speed change:
Desired Speed...........................................ENTER INTO SCRATCHPAD

Enter desired speed into scratchpad using the data entry keys.
Line Select Key 1 ..............................................................................PUSH

Push Line Select key 1 and observe, speed displayed in Data Line 1 with SPD and SEL flashing and Line Select key 1 illuminated. Push Line Select key 1 again to command speed.
Note:  If the 250 knot speed restriction below 10,000 feet is in effect, VERTICAL ALERT it will illuminate when projected time to 10,000 feet is 15 seconds. The command shown on the CDU and speed bug will begin to decrease as altitude approaches 10,000 feet such that 250 knots will be achieved at 10,000 feet.
(Continued)
DES OPT Note: The DES OPT page can be called up at any time to arm the DES OPT mode. For auto-selection of DES OPT at TOD:
DES Key............................................................................................PUSH
Slew Switch .......................................................................................PUSH

Push SLEW switch in either direction until DES OPT page is displayed. Observe SPD and SEL flashing in Data Line 1.
Line Select Key 1 ..............................................................................PUSH

Push Line Select key 1 to COMMAND mode. To transition to DES OPT from another DESCENT mode:
Slew Switch .......................................................................................PUSH

Push SLEW switch in either direction until DES OPT page is displayed. Observe SPD and SEL flashing in Data Line 1. Push Line Select key 1 to COMMAND mode.
Note:  If the 250 knot speed restriction is in effect, the VERTICAL ALERT light will illuminate when the projected time to 10,000 feet is 15 seconds. Speed will transition to 250 knots or remain at optimum, whichever is lower. 
DES (V/S) 

To transition to DES (V/S), PMS must be CRZ or DES, and armed altitude below current altitude. Observe DES (V/S) NOW? is displayed in Data Line 2 of DES (OPT or (NON OPT)) page.
Line Select Key 2 ..............................................................................PUSH
　
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