A commuter departing prc comes in close proximity to an arriving small aircraft on ARTCC frequency.

Attributes
ACN	179821
Time
Date	199105
Day	Thu
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : prc
State Reference	AZ
Altitude	agl bound lower : 600 agl bound upper : 800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab tower : prc
Operator	general aviation : personal
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	descent other landing other
Route In Use	arrival other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Small Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : takeoff
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Experience	controller non radar : 1
ASRS Report	179821
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : nmac other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 0 vertical : 200
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Inter Facility Coordination Failure

Narrative:

ZAB passed us an inbound of small aircraft X EST drake VOR at xx:33Z for a visibility from the west. At xx:33Z, small aircraft X called inbound requesting a left downwind entry allowing him to lose some altitude. I told small aircraft X to report over the airport at or above 6500' MSL (field elevation prc is 5042') and expect to circle east for the left down for runway 21. Then air carrier Y was cleared for takeoff (departure runway 21). At xx:34Z, air carrier Y was approximately 1/4 mi off the departure end, 800' AGL when the captain asked what the small aircraft was instructed to do. After I told him, air carrier Y said they had to climb to avoid the small aircraft and missed him by 200'. ZAB held small aircraft X on their frequency until he was well inside the prc air traffic area. Small aircraft X cancelled his IFR to call us (prc tower). That still does not explain why he was approximately 600' AGL flying through the upwind, especially when he was instructed to report over the airport at or above 6500' (approximately 1500' AGL). We run 1000 plus operations a day at prc and need radar.

Original NASA ASRS Text

Title: A COMMUTER DEPARTING PRC COMES IN CLOSE PROX TO AN ARRIVING SMA ON ARTCC FREQ.

Narrative: ZAB PASSED US AN INBND OF SMA X EST DRAKE VOR AT XX:33Z FOR A VIS FROM THE W. AT XX:33Z, SMA X CALLED INBND REQUESTING A L DOWNWIND ENTRY ALLOWING HIM TO LOSE SOME ALT. I TOLD SMA X TO RPT OVER THE ARPT AT OR ABOVE 6500' MSL (FIELD ELEVATION PRC IS 5042') AND EXPECT TO CIRCLE E FOR THE L DOWN FOR RWY 21. THEN ACR Y WAS CLRED FOR TKOF (DEP RWY 21). AT XX:34Z, ACR Y WAS APPROX 1/4 MI OFF THE DEP END, 800' AGL WHEN THE CAPT ASKED WHAT THE SMA WAS INSTRUCTED TO DO. AFTER I TOLD HIM, ACR Y SAID THEY HAD TO CLB TO AVOID THE SMA AND MISSED HIM BY 200'. ZAB HELD SMA X ON THEIR FREQ UNTIL HE WAS WELL INSIDE THE PRC ATA. SMA X CANCELLED HIS IFR TO CALL US (PRC TWR). THAT STILL DOES NOT EXPLAIN WHY HE WAS APPROX 600' AGL FLYING THROUGH THE UPWIND, ESPECIALLY WHEN HE WAS INSTRUCTED TO RPT OVER THE ARPT AT OR ABOVE 6500' (APPROX 1500' AGL). WE RUN 1000 PLUS OPS A DAY AT PRC AND NEED RADAR.

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.