M7.19 Lightning Strikes and HIRF Cat B1/B2 V7.01

At what altitudes are aircraft most likely to encounter lightning strikes?

• Below 8000 ft

• Between 14,000 ft to 20,000 ft

• Between 8000 ft to 14,000 ft

• Above 20,000 ft

Lightning strikes on aircraft can cause damage primarily through:

• Inducing turbulence

• Creating sonic booms

• Generating electromagnetic pulses

• Producing a current in the aircraft skin

How often does a lightning strike occur on an aircraft according to statistics?

• Every 1000 flying hours

• Approximately every 500 flying hours

• Approximately every 3000 flying hours

• Every 5000 flying hours

Which of the following is NOT considered a zone where lightning strike damage usually occurs on an aircraft?

• Nose section and radome

• Engine nacelles

• Trailing edges of flap track fairing tips

• Vertical fin tip and rudder tip

What is the primary purpose of lightning strike diverter strips installed on composite radomes?

• To attract lightning away from the aircraft

• To disperse rainwater during storms

• To prevent lightning damage to the composite structure

• To increase the aircraft's aerodynamic efficiency

Following a lightning strike, what potential problem might occur with ferrous components?

• They might become electrified

• They might cause interference with the aircraft's radio systems

• They might become magnetized

• They might experience rapid corrosion

What is the purpose of static dischargers installed on aircraft?

• To attract lightning strikes

• To prevent interference in radio receivers

• To generate static electricity

• To repel birds during flight

What is HIRF, as mentioned in the text?

• High-Intensity Radar Field

• High-Intensity Radiation Field

• High-Intensity Resistance Factor

• High-Intensity Radio Flash

How are aircraft systems affected by HIRF?

• They become more fuel-efficient

• They experience increased turbulence

• Their electrical and electronic systems may be compromised

• They gain better communication with ground control

What is the primary purpose of degaussing an aircraft after a lightning strike?

• To neutralize magnetization effects

• To eliminate radio interference

• To repair damaged structural components

• To recalibrate the aircraft's altimeter