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