Shv controller described incident when aircraft exiting runway used another runway for taxi without ATC approval resulting in a pilot deviation.
Synopsis
Shv controller described incident when aircraft exiting runway used another runway for taxi without ATC approval resulting in a pilot deviation.
Narrative
Rewritten in plain English from NASA’s original all-caps telegraphic report — facts, figures, and terminology preserved.
Aircraft was instructed to taxi to the ramp. The aircraft turned onto a runway that parallels the taxiway. The runway was active, but not in use. No other aircraft were involved.
This runway is sometimes used for aircraft taxi operations. Some controllers allow this when a pilot requests it. This leads pilots to believe it is proper to use a runway to taxi on without permission. 'Taxi to the ramp' allows an aircraft to 'cross' runways along the most direct route to parking, but does not allow the runway as a 'route' to the ramp.
The controller was alone in the tower and carrying out other duties and did not detect the aircraft on runway 5 until it was on the runway.
Show the original NASA report (verbatim, telegraphic)
ACFT WAS INSTRUCTED TO TAXI TO THE RAMP. THE ACFT TURNED ONTO A RWY THAT PARALLELS THE TXWY. THE RWY WAS ACTIVE; BUT NOT IN USE. NO OTHER ACFT WERE INVOLVED. THIS RWY IS SOMETIMES USED FOR ACFT TAXI OPS. SOME CTLRS ALLOW THIS WHEN A PLT REQUESTS IT. THIS LEADS PLTS TO BELIEVE IT IS PROPER TO USE A RWY TO TAXI ON WITHOUT PERMISSION. 'TAXI TO THE RAMP' ALLOWS AN ACFT TO 'CROSS' RWYS ALONG THE MOST DIRECT RTE TO PARKING; BUT DOES NOT ALLOW THE RWY AS A 'RTE' TO THE RAMP. THE CTLR WAS ALONE IN THE TWR AND CARRYING OUT OTHER DUTIES AND DID NOT DETECT THE ACFT ON RWY 5 TIL IT WAS ON THE RWY.
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Source: NASA Aviation Safety Reporting System (public domain). Reports are voluntary submissions and are not verified by NASA.