Aviation Maintenance Technician Series Airframe textbook, Vol. 1 & 2 ASA Pages 455–461,
533–538, 776–777
1. What is an annunciator panel in an aircraft?
A single location that contains all of the warning and condition lights for the aircraft. This makes it easy for the pilot to monitor all of the systems at a glance.
2. Which device in an antiskid brake system would likely cause the brakes to fail to release when a skid developed?
A malfunctioning antiskid valve.
3. Where are the skid detectors located in an antiskid brake system?
In the center of the wheel hub.
4. What condition could cause a takeoff warning system to actuate?
The takeoff warning system gives an aural warning when the power lever is advanced for takeoff if the flight controls for the stabilizer, the flaps, and the speed brakes are in an unsafe condition for takeoff.
5. What would cause the warning horn to sound when the throttles are pulled back, reducing the engine power for landing?
The warning horn will sound if any of the landing gears are not down and locked.
6. What is indicated by a red light in the landing gear position indication portion of the annunciator panel.
The red light indicates that the landing gear is not in a safe condition for landing.
7. Where is the landing gear safety switch normally located?
On one of the landing gear shock struts so the switch is actuated when the weight of the aircraft is on the landing gear.
8. What information is given to a pilot to indicate that all of the landing gears are down and locked?
Three green lights are used on most aircraft to indicate that all three landing gears are down and locked.
1. Locate and identify for the examiner: the down-limit switches, the up-limit switches, and the landing gear safety switch on an aircraft with retractable landing gear.
2. Locate and identify for the examiner: the wheel speed sensors, the antiskid valves, and the antiskid control box in an aircraft equipped with an antiskid brake system.
3. Using a wiring diagram of the landing gear warning system of an aircraft, explain to the examiner the malfunctions that could cause the warning horn to fail to sound when the throttles are retarded and the landing gear is not down and locked.
4. Demonstrate to the examiner the correct way to check the wheel speed sensors of an antiskid brake system for operation.
5. Demonstrate to the examiner the correct way to check for a malfunction in a cabin door warning light circuit.
6. Using the correct circuit diagram, indicate to the examiner the items you would check if a takeoff warning system failed to warn the pilot that the flaps were not in the takeoff position.