Aircraft Ice and Rain Control Systems

Vocabulary flashcards covering aircraft ice and rain protection systems, pneumatic deicer boots, pumps, and windshield clearance mechanisms.

Modern jet transport windshield ice prevention

Prevention of ice formation using an embedded heater element heated by an electric current.

Pneumatic deicer boot operation timing

Operation occurs only after ice has formed over the boots; inflation breaks the ice so that airflow over the airfoil blows it away.

Pneumatic deicer boot air source (reciprocating-engine aircraft)

The discharge side of the air pump used to operate gyro instruments.

Wet vacuum pump

A vacuum pump used to power pneumatic deicer boots that relies on engine oil to lubricate its steel vanes.

Dry vacuum pump

A vacuum pump that utilizes carbon vanes and requires no oil for lubrication.

Oil separator

A component used with wet vacuum pumps to remove lubricating oil from discharge air before it reaches the deicer boots.

Rubber deicer boot cleaning procedure

Washing the rubber boots with mild soap and water.

Deicer boot attachment methods

Bonding to leading edge surfaces with an adhesive, or securing with fairing strips, machine screws, and Rivnuts on older aircraft.

Deicer boot inflation sequence

The center tube of a three-tube boot inflates first, followed by the upper and lower tubes a specified number of seconds later.

Windshield rain removal methods

Blowing rain away with a high-velocity blast of compressor bleed air, or wiping it away using electrically or hydraulically operated windshield wipers.

Deicer boot cold patch repair requirement

Relieving installed tension on the boot prior to performing the patch repair.

Electronic timer (pneumatic deicer system)

A unit that controls the operating sequence and time intervals of a pneumatic deicer boot system.

Methods of inflating pneumatic deicer boots

Using an engine-driven vacuum pump or bleed air from a turbine-engine compressor.

In-flight deicer boot hold-down mechanism

Suction used to hold deicer boots securely down against the airfoil surfaces during flight.