assemblies for each wing flap. Each wing flap torque tube drive line set is
connected to the PDU and extends outboard along the rear beam of the
wing to the inboard and outboard ball screw actuators.
E. Flap Actuators:
The purpose of the flap actuators is to convert rotary input torque to linear
output motion and force to extend or retract the flap assemblies. The
actuator contains a worm and wheel gear set to translate the torque tube
rotation into linear motion. A force limiter protects the aircraft structure from
PDU torque if a flap roller or track jam occurs. The force limiter is
bi-directional and is self resetting by reversing the direction of rotation.
F. Flap Resolvers (Position Feedback Transducer):
The flap resolvers provide flap position feedback to the FCU. The resolvers
are continuously monitored by the FCU channels. The resolvers are
electromechanical devices; each resolver receives electrical inputs to the
stator and mechanical inputs (rotational) inputs to the rotor. A resolver is
located on each outboard flap actuator.
3. Controls and Indications:
(See Figure 12.)
NOTE:
A full description of the Primary Flight Display can be
found in section 2B-02-00: Electronic Display System
Description. A full description of the FLIGHT
CONTROLS synoptic page can be found in section
2B-03-00: Engine Instruments and Crew Alerting
System Description.
A. Circuit Breakers (CBs):
The flaps system is protected by the following CBs:
Circuit Breaker Name: CB Panel: Location: Power Source:
FLAP/STAB LEFT DC POP C-6 L ESS DC Bus
FLAP/STAB RIGHT DC CPOP C-6 R ESS DC Bus
FLAP/STAB L STBY AC POP D-2 L STBY AC Bus
FLAP/STAB R STBY AC CPOP D-2 R STBY AC Bus
B. Crew Alerting System (CAS) Messages:
CAS messages associated with the flaps system:
Area Monitored: CAS Message: Message Color:
FCU FLAP/STAB AUTORIG Amber
FCU FLAP CMD INVALID Amber
FCU FLAPS FAILED Amber
FCU FLP/STB SYNC FAIL Amber
FCU FLAP ASYMMETRY Amber
FCU UNCMDED FLAPS Amber
FCU
FLP/STB
MISCOMPARE
Amber
OPERATING MANUAL
PRODUCTION AIRCRAFT SYSTEMS 2A-27-00
Page 33
May 22/01
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