Position and warning systems CH 10
Anti-skid systems typically deactivate automatically at about______MPH.
20
Critical engine parameters are monitored in new generation aircraft and presented on electronic displays by a(n) ________ ________and______ _____system
Engine Indication, Crew Alerting
A____________________alerts the pilot of close proximity to terrain
Ground Proximity Warning System (GPWS)
Two types of stall warning used in small aircraft are
a. audible tone b. red light
Three main functions of the control unit:
a. generate electrical signals usable by the control valve. b. regulate brake pressure to prevent a skid during landing c. prevent application of the brakes prior to touchdown
Arming a takeoff configuration warning system requires two conditions to be met. These conditions are: a. The aircraft is_____________. b. One or more thrust levers is (are) _____________.
a. on the ground b. advanced for takeoff
The three principal components of an anti-skid system are the:
a. wheel-speed sensors b. anti-skid computer c. control valves
EICAS systems monitor both engine and airplane systems and display one of three of messages when abnormal conditions are detected. These are______,______or_______messages
alert, status, maintenance
To achieve maximum braking and to stop the aircraft in the shortest possible distance, the pilot depresses the brake pedals_____________
all the way
A stall occurs when an airplane reaches a critical _____ of ______
angle, attack
If a locked wheel is not quickly released, the tire is likely to ________, causing aircraft _________or loss of ________.
blow, damage, control
An AC wheel speed sensor produces a variable frequency__________while a DC wheel speed sensor produces a variable ________.
current, voltage
A typical landing gear warning system uses one or more ________lights to indicate a down-and-locked condition and a ______light to indicate an unsafe condition.
green, red
On wet or icy runways, the locked-wheel detector prevents a wheel from__________
hydroplaning
Landing gear warning horns typically indicate that the aircraft is in _______configuration with the gear not______and______
landing, down, locked
A(n)______-______detector prevents the pilot from landing with the brakes applied.
locked-wheel
A Magnesyn system uses a ______ -_____rotor while an Autosyn system uses an __________rotor.
permanent magnet, electromagnet
The control valve maintains an output________,which is proportional to the signal _____from the control unit.
pressure, current
Mach airspeed warning can only be silenced by _____________
reducing speed
To achieve maximum braking, the wheel should just start to________but not _______
slip, skid
Angle-of-attack sensors may use either a ______or a ______type probe
slot, vane
Many stall warning systems measure the movement of the _____ -______on the wing
stagnation point
High performance aircraft generally use a ______-_______to warn the pilot of an impending stall.
stick-shaker
An Autosyn position indicating system uses a pair of identical _________motors in the transmitter and indicator.
synchronous
Anti-skid system include______circuits and controls to certify proper operation
test
An auto-brake system automatically applies the brakes when the system senses_______on the _______.
weight, wheels (main wheels)
The most logical place to begin troubleshooting an anti-skid system is with the _________________
wheel-speed sensor
The braking effectiveness of a skidding tire is nearly ________
zero