Near midair collision between a C172 landing over the top of a BE76 in position and holding.

Attributes
ACN	512926
Time
Date	200105
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : prc.airport
State Reference	AZ
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : ord.tower
Operator	general aviation : instructional
Make Model Name	Duchess 76
Operating Under FAR Part	Part 91
Flight Phase	ground : position and hold ground : holding
Flight Plan	VFR
Aircraft 2
Controlling Facilities	tower : prc.tower
Operator	general aviation : personal
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing : roll
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar controller : radar controller : military
Experience	controller military : 4 controller non radar : 0.5 controller radar : 18
ASRS Report	512926
Person 2
Affiliation	other
Function	instruction : trainee
Events
Anomaly	conflict : ground critical ground encounters other incursion : runway non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : insufficient time
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Problem Areas	ATC Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

BE76 called ready for departure. 3 aircraft on final to same runway. Held short awaiting arrival of third aircraft. I looked at third aircraft and misjudged his position relative to the threshold (aircraft on final was higher than normal!) instructed BE76 to taxi into position and hold. As he was turning onto the runway, aircraft on final passed over head and landed. I don't think the aircraft on final ever saw the BE76 moving into position. I also don't think the BE76 saw the aircraft on final because he was so high. The aircraft on final was a C172.

Original NASA ASRS Text

Title: NMAC BETWEEN A C172 LNDG OVER THE TOP OF A BE76 IN POS AND HOLDING.

Narrative: BE76 CALLED READY FOR DEP. 3 ACFT ON FINAL TO SAME RWY. HELD SHORT AWAITING ARRIVAL OF THIRD ACFT. I LOOKED AT THIRD ACFT AND MISJUDGED HIS POS RELATIVE TO THE THRESHOLD (ACFT ON FINAL WAS HIGHER THAN NORMAL!) INSTRUCTED BE76 TO TAXI INTO POS AND HOLD. AS HE WAS TURNING ONTO THE RWY, ACFT ON FINAL PASSED OVER HEAD AND LANDED. I DON'T THINK THE ACFT ON FINAL EVER SAW THE BE76 MOVING INTO POS. I ALSO DON'T THINK THE BE76 SAW THE ACFT ON FINAL BECAUSE HE WAS SO HIGH. THE ACFT ON FINAL WAS A C172.

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.