Honeywell SPZ-8000 - Vertical Mode Problems

SPZ--8000 Digital Integrated Flight Control System
A28--1146--055
REV 2
Troubleshooting
9-6
Vertical Mode Problems
Refer to Table 9--3 and see Figure 9--2 for an in--flight pattern graphic
representation of vertical mode problems.
Mode
Problems
D Air data hold modes (ALT, VS,
IAS, MACH)
D Oscillates
D Porpoising
D Won’t hold reference
D Altit ude preselect (ASEL) D Misses capture
D Undershoots capture
D Overshoots capture
D Standoff
D Glideslope mode (vertical
portion of APR mode)
D Captures early
D Standoff
D Oscillates
Vertical Mode Problems
Table 9- -3
MISSED CAPTURE
SUSTAINED OSCILLATION
(PORPOISING)
MAGNITUDE
PERIOD
(TIME)
AD--34174@
Vertical Mode Conditions/Problems
Figure 9--2 (cont)