A BE76 instructor pilot and student almost collide with another aircraft in training during visual approachs to runways 21L&right at prc, az.

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Attributes
ACN	449911
Time
Date	199909
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : prc.airport
State Reference	AZ
Altitude	agl single value : 400
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : prc.tower
Operator	general aviation : instructional
Make Model Name	Duchess 76
Operating Under FAR Part	Part 91
Flight Phase	descent : vacating altitude descent : approach landing : touch and go
Route In Use	approach : visual approach : traffic pattern
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : prc.tower
Operator	general aviation : instructional
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : vacating altitude descent : approach landing : touch and go
Route In Use	approach : visual approach : traffic pattern
Flight Plan	None
Person 1
Affiliation	other
Function	instruction : instructor
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 1050 flight time type : 100
ASRS Report	449911
Person 2
Affiliation	other
Function	instruction : trainee
Qualification	pilot : private
Events
Anomaly	conflict : nmac non adherence : required legal separation non adherence : far non adherence : clearance
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time
Miss Distance	horizontal : 150 vertical : 150
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Environmental Factor
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Touch-and-goes at prc. Was conducting a simulated single pattern. Advised tower that we were simulated single. Tower acknowledged while we were right downwind for runway 21R and said 'roger, traffic to follow right base to final.' I acknowledged traffic insight. Controller said 'clear touch-and-go runway 21L.' I acknowledged 'clear touch-and-go runway 21L.' at this time, I believed the tower controller was trying to help us out since we were simulated single with the longer runway. This practice of having students land on the runway 21L while being on tower 128.75 (normally 125.3) has happened numerous times before. We never thought twice about being cleared touch-and-go or runway 21L from runway 21R pattern. Other pilot of other aircraft said that we came within 100-200 ft of them. We never saw them once.

Original NASA ASRS Text

Title: A BE76 INSTRUCTOR PLT AND STUDENT ALMOST COLLIDE WITH ANOTHER ACFT IN TRAINING DURING VISUAL APCHS TO RWYS 21L&R AT PRC, AZ.

Narrative: TOUCH-AND-GOES AT PRC. WAS CONDUCTING A SIMULATED SINGLE PATTERN. ADVISED TWR THAT WE WERE SIMULATED SINGLE. TWR ACKNOWLEDGED WHILE WE WERE R DOWNWIND FOR RWY 21R AND SAID 'ROGER, TFC TO FOLLOW R BASE TO FINAL.' I ACKNOWLEDGED TFC INSIGHT. CTLR SAID 'CLR TOUCH-AND-GO RWY 21L.' I ACKNOWLEDGED 'CLR TOUCH-AND-GO RWY 21L.' AT THIS TIME, I BELIEVED THE TWR CTLR WAS TRYING TO HELP US OUT SINCE WE WERE SIMULATED SINGLE WITH THE LONGER RWY. THIS PRACTICE OF HAVING STUDENTS LAND ON THE RWY 21L WHILE BEING ON TWR 128.75 (NORMALLY 125.3) HAS HAPPENED NUMEROUS TIMES BEFORE. WE NEVER THOUGHT TWICE ABOUT BEING CLRED TOUCH-AND-GO OR RWY 21L FROM RWY 21R PATTERN. OTHER PLT OF OTHER ACFT SAID THAT WE CAME WITHIN 100-200 FT OF THEM. WE NEVER SAW THEM ONCE.

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.