<< >> NASA ASRS Report 1427502, February 2017

ZDV center controller reported he was advised by an arrival to an uncontrolled airport that another aircraft had been given a departure clearance by another controller to departed opposite direction and too close to them.

Attributes
ACN	1427502
Time
Date	201702
Local Time Of Day	1801-2400
Place
Locale Reference	ZDV.ARTCC
State Reference	CO
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Small Transport
Operating Under FAR Part	Part 91
Flight Phase	Final Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	Large Transport
Operating Under FAR Part	Part 121
Flight Phase	Initial Climb
Flight Plan	IFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 2.0
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy

Narrative:

Aircraft X cancelled their IFR about 10 miles from the airport approaching runway 10. Aircraft Y was waiting on runway 28 ready for departure. I told both aircraft about each other and released aircraft Y at their discretion. Aircraft Y waited until aircraft X was very close before departing. I thought aircraft Y would wait until aircraft X landed; but instead they pushed it and got close enough to aircraft X that the pilot of aircraft X called the center wondering what was going on.the pilots need to talk to each other on local frequency and should know that if they go VFR; controllers will pass along their information; but they don't separate them from other IFR aircraft in the terminal environment.

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Original NASA ASRS Text

Title: ZDV Center Controller reported he was advised by an arrival to an uncontrolled airport that another aircraft had been given a departure clearance by another controller to departed opposite direction and too close to them.

Narrative: Aircraft X cancelled their IFR about 10 miles from the airport approaching Runway 10. Aircraft Y was waiting on Runway 28 ready for departure. I told both aircraft about each other and released Aircraft Y at their discretion. Aircraft Y waited until Aircraft X was very close before departing. I thought Aircraft Y would wait until Aircraft X landed; but instead they pushed it and got close enough to Aircraft X that the pilot of Aircraft X called the Center wondering what was going on.The pilots need to talk to each other on local frequency and should know that if they go VFR; controllers will pass along their information; but they don't separate them from other IFR aircraft in the terminal environment.

Data retrieved from NASA's ASRS site 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.