7.19 Me Lightening

Question 1

At what height is it more common for lightening to occur

Answer 1

5000-15000

Question 2

What type of flights is lightening more likely to occur at

Answer 2

Short haul flights

Question 3

What can a single bolt of lightening contain

Answer 3

1 million to 30,000amps

Question 4

Where does lightening normally enter through

Answer 4

Radome, forward fuselage, nacelle, empennage or wing tip

Question 5

What may be seen in nose or wing tips

Answer 5

A red glow caused by ionisation

Question 6

Where does the current flow from a strike

Answer 6

Through the conductive exterior skin and structure and exits out of another extremity such as tail, seeking polarity or ground

Question 7

What protects the internal from EMI

Answer 7

the external structure

Question 8

What are the two types of damage from a strike

Answer 8

Direct
Indirect

Question 9

What is direct damage

Answer 9

Surface burned, melted or signs of metallic distortion

Question 10

What is indirect damage

Answer 10

Electrical damage

Question 11

What is the size of a normally melt mark

Answer 11

1/8

Question 12

What is the size of a large burn mark

Answer 12

1/4

Question 13

What else can you look out for to see lightening damage

Answer 13

Colour distortion on skin or rivets

Question 14

What does HIRF stand for

Answer 14

High intensity radiated fields

Question 15

What can HIRF do to an aircraft

Answer 15

Cause electromagnetic interference from external source which could upset the digital systems

Question 16

Since when have aircrafts complied with HIRF

Answer 16

1992

Question 17

What should happen modifications to a/c do

Answer 17

Be asses by manufacture for effect to HIRF