Nov. 68a, 4-5. “Mayday Squawk” refers to the activation of the SIF/IFF
transponder’s "ident" button, which results in the aircraft's blip "blossoming"
on the controller’s radarscope. In this instance, the ident feature was used to
determine if the radio
failure was only one way, and whether the pilot could still receive. The
accident Werlich refers to occurred on 4 Oct. involving a B-52H that had lost
radio contact during approach. Due
to engine failure, the aircraft spun out of control and crashed killing four
crewmembers. The “USAF Accident Report” is included in the Archive section.