Near midair collision between 2 small transport twins in air traffic area, class D airspace.

Attributes
ACN	283508
Time
Date	199409
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : gcn
State Reference	AZ
Altitude	msl bound lower : 8700 msl bound upper : 8700
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : gcn
Operator	common carrier : air taxi
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 135
Flight Phase	climbout : intermediate altitude
Flight Plan	VFR
Aircraft 2
Make Model Name	Cessna 310/T310C
Operating Under FAR Part	other : unknown
Person 1
Affiliation	company : air taxi
Function	flight crew : single pilot
Qualification	pilot : atp pilot : cfi
Experience	flight time last 90 days : 200 flight time total : 2500 flight time type : 200
ASRS Report	283508
Person 2
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Events
Anomaly	conflict : nmac other anomaly other
Resolutory Action	none taken : insufficient time
Consequence	Other
Miss Distance	horizontal : 500 vertical : 0
Supplementary
Primary Problem	Flight Crew Human Performance

Narrative:

After takeoff from runway 3, I was offered an early turnout from runway 3 at gcn, standard procedures are direct to 'the square' (landmark) after the square transition to the blue 1 direct. While en route to the square, a cessna-310 passed less than 500 ft off my left wing. Vertical separation: zero. The other aircraft was following directions from gcn tower. I believe the problem was complacency on behalf of gcn tower. Compounded with an aircraft unfamiliar with his environment. Pattern altitude is 7500 ft MSL, miss occurred at about 9000 ft MSL.

Original NASA ASRS Text

Title: NMAC BTWN 2 SMT TWINS IN ATA, CLASS D AIRSPACE.

Narrative: AFTER TKOF FROM RWY 3, I WAS OFFERED AN EARLY TURNOUT FROM RWY 3 AT GCN, STANDARD PROCS ARE DIRECT TO 'THE SQUARE' (LANDMARK) AFTER THE SQUARE TRANSITION TO THE BLUE 1 DIRECT. WHILE ENRTE TO THE SQUARE, A CESSNA-310 PASSED LESS THAN 500 FT OFF MY L WING. VERT SEPARATION: ZERO. THE OTHER ACFT WAS FOLLOWING DIRECTIONS FROM GCN TWR. I BELIEVE THE PROB WAS COMPLACENCY ON BEHALF OF GCN TWR. COMPOUNDED WITH AN ACFT UNFAMILIAR WITH HIS ENVIRONMENT. PATTERN ALT IS 7500 FT MSL, MISS OCCURRED AT ABOUT 9000 FT MSL.

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.