<< >> NASA ASRS Report 361831, March 1997

A controller cleared a C152 into position and hold behind a departing B757. The C152 pilot departed without clearance before the B757 cleared the runway at the end.

Attributes
ACN	361831
Time
Date	199703
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : phx
State Reference	AZ
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Cessna 152
Operating Under FAR Part	Part 91
Flight Phase	climbout : takeoff
Route In Use	departure other
Flight Plan	None
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	B757 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	climbout : initial climbout : takeoff
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : radar
Experience	controller radar : 15 flight time total : 40
ASRS Report	361831
Person 2
Affiliation	Other
Function	flight crew : single pilot
Qualification	pilot : private
Events
Anomaly	conflict : ground less severe non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	other
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 750
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

A cessna was issued 'taxi into position and hold' behind a B757. The B757 was 10000 ft down runway when the cessna began takeoff roll. No clearance was issued. The pilot did not respond to control instructions. The cessna had less than standard separation.

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Original NASA ASRS Text

Title: A CTLR CLRED A C152 INTO POS AND HOLD BEHIND A DEPARTING B757. THE C152 PLT DEPARTED WITHOUT CLRNC BEFORE THE B757 CLRED THE RWY AT THE END.

Narrative: A CESSNA WAS ISSUED 'TAXI INTO POS AND HOLD' BEHIND A B757. THE B757 WAS 10000 FT DOWN RWY WHEN THE CESSNA BEGAN TKOF ROLL. NO CLRNC WAS ISSUED. THE PLT DID NOT RESPOND TO CTL INSTRUCTIONS. THE CESSNA HAD LTSS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.