C150 pilot and a PA44 had an near midair collision in dvt class D. ATCT local controller intrafac co...

Attributes
ACN	590276
Time
Date	200308
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : dvt.airport
State Reference	AZ
Altitude	agl single value : 1000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : dvt.tower
Operator	general aviation : personal
Make Model Name	Cessna 150
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Flight Plan	None
Aircraft 2
Controlling Facilities	tower : dvt.tower
Operator	general aviation : instructional
Make Model Name	PA-36 Pawnee Brave
Operating Under FAR Part	Part 91
Flight Phase	descent : approach
Route In Use	approach : traffic pattern
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private
Experience	flight time last 90 days : 29 flight time total : 62 flight time type : 59
ASRS Report	590276
Person 2
Affiliation	other
Function	flight crew : single pilot
Events
Anomaly	conflict : nmac non adherence : required legal separation
Independent Detector	other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Miss Distance	horizontal : 0 vertical : 100
Supplementary
Problem Areas	ATC Human Performance Flight Crew Human Performance
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure

Narrative:

My passenger and I were about 3 mi northwest of sdl when we initially contacted dvt on 118.4. The controller, upon hearing our request, told us we were closer to a directly east position, so she cleared us for a straight-in approach to runway 25L. We were told to report at cave creek road. We informed the controller that we park on the north side, and asked if we could use the north runway, runway 25R. She told us to switch our approach to runway 25R and contact the tower on 120.2. We switched frequencys and immediately encountered a plethora of radio traffic. Amidst all of the chatter we heard the tower contact an aircraft Z plane to inform them of a cessna on final (us). They asked if the aircraft Z plane could alter their approach to runway 25L and at this time the aircraft Z flight responded that they could see us and that they would alter their approach. When the radio traffic calmed down I finally got a chance to report that I was just past cave creek. They cleared me to land and immediately after that the piper passed directly overhead at around 100 ft of separation from our plane. It was close enough to scare both my passenger and I, and we're not easily frightened. We both figured that because he had seen us earlier he would have tried to divert a little earlier. Our landing was uneventful and immediately after we had secured the plane we called the tower. The person that answered said that they didn't see the altercation, but they would check into it.

Original NASA ASRS Text

Title: C150 PLT AND A PA44 HAD AN NMAC IN DVT CLASS D. ATCT LCL CTLR INTRAFAC COORD FAILURE WAS THE PRIME CAUSE.

Narrative: MY PAX AND I WERE ABOUT 3 MI NW OF SDL WHEN WE INITIALLY CONTACTED DVT ON 118.4. THE CTLR, UPON HEARING OUR REQUEST, TOLD US WE WERE CLOSER TO A DIRECTLY E POS, SO SHE CLRED US FOR A STRAIGHT-IN APCH TO RWY 25L. WE WERE TOLD TO RPT AT CAVE CREEK ROAD. WE INFORMED THE CTLR THAT WE PARK ON THE N SIDE, AND ASKED IF WE COULD USE THE N RWY, RWY 25R. SHE TOLD US TO SWITCH OUR APCH TO RWY 25R AND CONTACT THE TWR ON 120.2. WE SWITCHED FREQS AND IMMEDIATELY ENCOUNTERED A PLETHORA OF RADIO TFC. AMIDST ALL OF THE CHATTER WE HEARD THE TWR CONTACT AN ACFT Z PLANE TO INFORM THEM OF A CESSNA ON FINAL (US). THEY ASKED IF THE ACFT Z PLANE COULD ALTER THEIR APCH TO RWY 25L AND AT THIS TIME THE ACFT Z FLT RESPONDED THAT THEY COULD SEE US AND THAT THEY WOULD ALTER THEIR APCH. WHEN THE RADIO TFC CALMED DOWN I FINALLY GOT A CHANCE TO RPT THAT I WAS JUST PAST CAVE CREEK. THEY CLRED ME TO LAND AND IMMEDIATELY AFTER THAT THE PIPER PASSED DIRECTLY OVERHEAD AT AROUND 100 FT OF SEPARATION FROM OUR PLANE. IT WAS CLOSE ENOUGH TO SCARE BOTH MY PAX AND I, AND WE'RE NOT EASILY FRIGHTENED. WE BOTH FIGURED THAT BECAUSE HE HAD SEEN US EARLIER HE WOULD HAVE TRIED TO DIVERT A LITTLE EARLIER. OUR LNDG WAS UNEVENTFUL AND IMMEDIATELY AFTER WE HAD SECURED THE PLANE WE CALLED THE TWR. THE PERSON THAT ANSWERED SAID THAT THEY DIDN'T SEE THE ALTERCATION, BUT THEY WOULD CHK INTO IT.

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.

C150 pilot and a PA44 had an near midair collision in dvt class D. ATCT local controller intrafac coordination failure was the prime cause.