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When a pilot reports a potential lightning strike, which of the following effects can be commonly associated with such incidents?

1. Aircraft damage 
2. Erratic compass reading 
3. Failure of some avionics instruments 
4. St Elmo's fire 
5. The smell of sulphur dioxide 
6. Temporary blindness

  • A

    1, 2, 3 and 6.

  • B

    1, 2, 3 and 5.

  • C

    1, 3, 4 and 6.

  • D

    2, 3, 4 and 6.

Refer to figure. 
Lightning is most prone to occur in the vicinity of the freezing level, typically within a range of approximately 5000 feet. During this time, the temperature typically ranges between +10°C and -10°C. A lightning strike can result in several significant effects, including:

  • Temporary blindness experienced by the pilots.
  • Potential damage to the airframe including antennas, radomes, or other exposed components.
  • Serious disruption to magnetic compasses, often leading to errors of tens of degrees. It is advised to exercise caution when relying on compass information until it can be verified.
  • Disruption and potential damage to electrical equipment on board the aircraft.
  • Temporary loss of communication systems or disruptions in radio transmissions.

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