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circuit to the respective hydraulic shutoff delay relay. If the relay remains
energized for more than ½ second, it energizes the respective hydraulic
shutoff control relay. The control relay in turn powers its hydraulic shutoff
valve to the closed position. Activation of the shutoff valve also causes an
amber EL CMB HYD OFF (or EL FLT HYD OFF) message to be displayed
on CAS.
3. Controls and Indications:
(See Figure 6 and Figure 7 through Figure 9.)
A. Circuit Breakers (CBs):
Circuit Breaker Name: CB Panel: Location: Power Source:
SHAKER #1 CPO A-10 Essential DC Bus
SHAKER #2 CPO B-10 R Main DC Bus
STALL BARR DUMP
VALVE
CPO A-8 Essential DC Bus
STALL BARR VALVE #1 CPO A-12 Essential DC Bus
STALL BARR VALVE #2 CPO B-12 R Main DC Bus
STALL BARRIER #1 CPO A-9 Essential DC Bus
STALL BARRIER #2 CPO B-9 R Main DC Bus
STALL WARN CMPTR #1 CPO A-11 Essential DC Bus
STALL WARN CMPTR #2 CPO B-11 R Main DC Bus
ELEV COMB HYD S/O (1) CPO B-15 Essential DC Bus
ELEV FLT HYD S/O (1) CPO A-15 Essential DC Bus
ELEV TRIM TAB ACTR
HTR (2)
CP L-9 L Main AC Bus, φC
NOTE(S):
(1) CAA certified aircraft only.
(2) SN 1380 & subs; SN 1000 - 1379 having ASC 342.
B. Warning (Red) Messages and Annunciations:
Annunciation: Cause or Meaning:
Red chevron illuminated on pilot’s /
copilot’s AOA indexer.
AOA for approach and landing is too
high.
C. Caution (Amber) Messages and Annunciations:
CAS Message: Cause or Meaning:
AOA HEAT 1-2 FAIL Angle of attack probe heater failed.
EL CMB HYD OFF (1) The flight control automatic failure detection system has
shut off Combined hydraulic system pressure to the
elevator actuator.
EL FLT HYD OFF (1) The flight control automatic failure detection system has
shut off Flight hydraulic system pressure to the elevator
actuator.
EL MISTRIM NOSE
UP/DN
Autopilot elevator trim out of trim in direction indicated.
OPERATING MANUAL
2A-27-00 PRODUCTION AIRCRAFT SYSTEMS
Page 14
October 11/02
Revision 8
CAS Message: Cause or Meaning:
MACH TRIM LIMIT Elevator trim has reached electrical trim limit while
operating airplane in Mach Trim speed region (greater
than 0.80 Mach).
MACH TRIM OFF PITCH TRIM switch selected OFF or electric pitch trim has
failed. (This message is inhibited at less than 0.82 Mach.)
STALL BARRIER 1-2 Stall barrier system giving stall angle indication.
STALL BARR 1-2 FAIL Stall barrier failed.
It is normal for STALL BARR 1 FAIL message to be
displayed any time EMERGENCY FLAPS are used and
flaps position is greater than 22°.
STALL BARRIER OFF STALL BARRIER switch is OFF or system not powered.
TRIM LIMIT Autopilot elevator trim has reached electrical trim limits.
NOTE(S):
(1) CAA certified aircraft only.
Annunciation: Cause or Meaning:
Amber chevron illuminated on pilot’s /
copilot’s AOA indexer. AOA for approach and landing is too low.
4. Limitations:
A. Angle-of-Attack (AOA) System:
(1) Use As A Reference:
Angle-of-Attack (AOA) may be used as reference, but does not
replace airspeed as the primary reference.
(2) Indication Parameters:
AOA indication must be within white band once forward airspeed is
attained during takeoff roll.
(3) Use As A Speed Reference:
AOA shall not be used as a speed reference for takeoff rotation.
B. Stall Barrier / Stall Warning:
(1) Takeoff Requirements:
Both stall warning / stall barrier systems must be operative for
takeoff.
(2) Use of System:
Stall barrier systems must be ON during all flight operations except
as noted in Section 05-15-40, Stall Barrier Malfunction. Refer to this
system description for a description of the stall warning / stall barrier
system checkout procedure.
C. Mach Trim Compensation / Electric Elevator Trim:
(1) Use of mach trim compensation:
Mach trim compensation must be ON during all flight operations
except as provided for in Section 05-03-40, Mach Trim
Compensation Failure.
(2) If mach trim compensation failure is coupled with yaw damper
failure:
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS 2A-27-00
Page 15
October 11/02
Revision 8
When mach trim compensation failure is coupled with yaw damper
failure, observe speed limitations for both failures and limit altitude
to 41,000 ft.
D. Mach Trim / Electric Elevator Trim Inoperative Speed:
With both mach trim compensators inoperative or electric elevator trim
inoperative, the maximum operating limit speed is 0.75 MT.
OPERATING MANUAL
2A-27-00 PRODUCTION AIRCRAFT SYSTEMS
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