Airframe - AM.II.I.K7 - Emergency locator transmitter (ELT)

Question 1

On what two frequencies does the emergency locator transmitter operate?

Answer 1

121.5 and 243.0 megahertz

Question 2

Where is the ELT transmitter normally located on an aircraft?

Answer 2

In the tail of the aircraft or as far aft as possible, so it will be least likely to be damaged in a crash

Question 3

How often should ELT batteries be replaced or recharged? (3)

Answer 3

• 1 cumulative hour use
• battery expired
• 50% charge expired

Question 4

How can you know when an ELT battery must be replaced or recharged?

Answer 4

By the date marked on the outside of the transmitter

Question 5

How often must ELTs be be inspected for proper installation, battery corrosion, operation of the controls and sensor, and the presence of the radiated signal?

Answer 5

Every 12 months

Question 6

What causes an ELT to actuate?

Answer 6

An inertia switch that detects an impact parallel to the longitudinal axis of the aircraft as would occur in a crash

Question 7

How is an ELT tested to determine that it’s working?

Answer 7

• Actuate the test switch and listen on 121.5 or 243 megahertz
• Make the test during the first 5 mins of the hour
• Do not let ELT operate for more than 3 sweeps
• If the ELT is operated outside of this time, you should contact the control tower before conducting the test