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A pilot is flying under IFR in an airspace where radar is used in the provision of air traffic control. he/she is experiencing air-ground communications failure. The last communication he/she received was a level assignment. After reaching this level, he/she should maintain it for a period of how many minutes?

  • A

    5 minutes

  • B

    7 minutes

  • C

    15 minutes

  • D
    20 minutes

AIR-GROUND COMMUNICATIONS FAILURE
If the aircraft fails to indicate that it is able to receive and acknowledge transmissions, separation shall be maintained between the aircraft having the communication failure and other aircraft, based on the assumption that the aircraft will:

If in instrument meteorological conditions or when conditions are such that it does not appear likely that the pilot will complete the flight in accordance with visual meteorological conditions:

1) in airspace where an ATS surveillance system is used in the provision of air traffic control, maintain the last assigned speed and level, or minimum flight altitude if higher, for a period of 7 minutes following:

i) the time the last assigned level or minimum flight altitude is reached; or
ii) the time the transponder is set to Code 7600 or the ADS-B transmitter is set to indicate the loss of air-ground communications; or
iii) the aircraft’s failure to report its position over a compulsory reporting point; whichever is later and thereafter adjust level and speed in accordance with the filed flight plan.

Further information can be found in ICAO Doc 4444.

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