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Thom Veer April 1, 2018 at 10:29 am

Is it ATC‘s procedure for Com failure I F R for aircraft to squawk 7600 for 1 min. Then return to I F R assigned squawk or leave on 7600

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JeffKanarish April 1, 2018 at 1:47 pm

Thom,

Thank you for asking. Good question. About 20-25 years ago, the transponder routine for comm failure was to squawk 7600 and then return to the ATC-assigned squawk. That is no longer the case. The current procedure is to squawk 7600 and remain on that code until landing or until radio comm can be re-established with ATC. The AIM says:

“6−4−2. Transponder Operation During
Two-way Communications Failure

a. If an aircraft with a coded radar beacon
transponder experiences a loss of two-way radio
capability, the pilot should adjust the transponder to
reply on Mode A/3, Code 7600.

b. The pilot should understand that the aircraft
may not be in an area of radar coverage.

Cheers,

Jeff

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