Brake System Maintenance

Question 1

What are reasons hot brakes may occur?

Answer 1

An aborted takeoff, after excessive braking when landing, or after towing an aircraft with a dragging brake assembly.

Question 2

What are the symptoms of hot brakes?

Answer 2

Loud popping, cracking noise, and a burning smell. in some cases, glowing red brakes.

Question 3

Peak temperatures from hot brakes may not be reached for up to ___ minutes after the aircraft comes to a complete stop.

Answer 3

20

Question 4

What are the three basic types of materials that contribute to wheel assembly fires?

Answer 4

Grease and bearing lubricants, hydraulic fluid, and rubber tires.

Question 5

Rubber from tires may ignite at what temperature range?

Answer 5

500-600*F

Question 6

What are the three most common brake systems?

Answer 6

Independent (not part of main hydraulics,) power boost (uses hydraulic system intermittently,) power brake (only uses hydraulics as a source of pressure.)
60s- Independent, 65s- power boost

Question 7

In an independent system, what does the master cylinder do?

Answer 7

Displaces fluid to the brake assembly through brake lines by movement of a piston inside a sealed fluid filled container

Question 8

What type disk brakes are used on all CG helicopters?

Answer 8

Single disk brakes (rather than multiple disk brakes)

Question 9

(Fixed Wing) After tough down, the anti-skid systems operate automatically until the speed of the aircraft has dropped below approximately ___ mph.

Answer 9

20