Ri M F Uncti O Ns; Bit/Diagnostics; Rm Al Accelero M Eter; Static Pressure Sensor - Honeywell BENDIX/KING KAP 140 Maintenance Manual

2. 10. 5 T RI M F UNCTI O NS
2. 10. 5. 1 M ist r im Annunciat ion
I f aut ot rim is not inst alled, t he syst em shall indicat e t he need f or m anual pit c h t rim whenever t he
r equir ed pit ch ser v o eff or t exceeds t he c er t if ied t hr eshold f or f ive seconds. I f aut ot r im is inst alled,
t he FCC shall indicat e a m ist r im af t er t he r equir ed pit ch ser v o eff ect exceeds t he c er t if ied t hr eshold
cont inuously f or t en, or f if t een seconds in -- 5403, -- 5504, -- 7703 and -- 7904 ver s ions. The m ist r im
indication shall be a flashing "PT" and either the up or down arrow (to indicate mistrim direction).
Tr im r elat ed v oice m essages shall be played in accor dance wit h s ect ion
2.10.5.2 Manual Electric Trim
If trim is installed, the FCC commands the trim servo up or down as requested by the MET switch
inputs. An up command is generated whenever UP and ARM switches are active; a down
command is generated whenever DOWN and ARM switches are active. If both UP and DOWN
switches are active simultaneously, no command is generated.
In a two--axis FCC system, pressing the ARM switch for 125 ms causes the autopilot to disengage.
This prevents the pitch autotrim from trying to oppose the pilot's manual trim commands.

2.11 BIT/DIAGNOSTICS

The FCC provides Built--In--Test capabilities to assist the system installer and maintenance
personnel. This capability is available through the Remote Terminal Interface, which uses an RS
232 port connected to a portable PC or dumb terminal. The FCC provides nonvolatile storage of
codes associated with all types of mode disengagements not requested by pilot. This storage can
also be reset by the service person. The FCC also provides status indication of all hardware inputs,
monitors and conditions associated with mode logic.
pushbuttons, and cockpit switches.
2.12 NORMAL ACCELEROMETER
The normal accelerometer provides a signal with a full scale range of at least 0.0 to 2.0 g
(absolute). Short--term drift rates should not exceed +/--.005 g/sec.

2.13 STATIC PRESSURE SENSOR

The static sensor provides pressure information from --1,000 ft to 35,000 ft with a 16--bit resolution
(approximately 1 foot).

2.14 ALTITUDE/VS COMPUTATION

The static pressure sensor is used to provide differential altitude which is blended with the
encoding altimeter input to provide absolute pressure altitude. If available, a baro--correction term
is then added to pressure altitude to provide baro--corrected altitude (used for altitude select and
altitude alerting functions). Normal acceleration is blended with a high--passed version of the
pressure altitude value to produce vertical speed, for pitch control.
Revision 2, Dec/ 2002
CS: 15574F02. I DU
BENDIX/KING
KAP 140
This includes sensor valids, mode
2. 8. 4
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