ZMP center controller reported the adjacent center was handing three aircraft off that were on confl...

Attributes
ACN	1450689
Time
Date	201705
Local Time Of Day	1201-1800
Place
Locale Reference	ZMP.ARTCC
State Reference	MN
Environment
Light	Daylight
Aircraft 1
Make Model Name	Medium Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 121
Flight Phase	Climb
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Transport Low Wing 2 Turbojet Eng
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Flight Plan	IFR
Person 1
Function	Enroute
Qualification	Air Traffic Control Fully Certified
Experience	Air Traffic Control Time Certified In Pos 1 (yrs) 26
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict Deviation - Procedural Published Material / Policy

Narrative:

I was working at the sector and noticed an alert on my display on three aircraft coming from the adjacent center. It indicated that aircraft X; who was level at 35000 feet was in conflict with aircraft Y and aircraft Z both climbing to 35000 feet all coming from the same adjacent center sector. Their 'controller' ended up stopping both aircraft Y and aircraft Z at 33000 feet. The problem was aircraft Z was behind aircraft Y and 160 knots faster. I alerted the underlying sector controllers to the large overtake. As soon as aircraft Y came over; the underlying sector controller stopped aircraft Y's climb at 31000 feet. If we had not noticed the overtake; separation would have been lost approximately 10 to 15 miles outside the other ARTCC airspace. Retrain center controllers and hold them accountable for their mistakes.

Original NASA ASRS Text

Title: ZMP Center Controller reported the adjacent Center was handing three aircraft off that were on conflicting headings and in an overtake situation.

Narrative: I was working at the sector and noticed an alert on my display on three aircraft coming from the adjacent Center. It indicated that Aircraft X; who was level at 35000 feet was in conflict with Aircraft Y and Aircraft Z both climbing to 35000 feet all coming from the same adjacent Center sector. Their 'controller' ended up stopping both Aircraft Y and Aircraft Z at 33000 feet. The problem was Aircraft Z was behind Aircraft Y and 160 knots faster. I alerted the underlying Sector controllers to the large overtake. As soon as Aircraft Y came over; the underlying sector controller stopped Aircraft Y's climb at 31000 feet. If we had not noticed the overtake; separation would have been lost approximately 10 to 15 miles outside the other ARTCC airspace. Retrain Center controllers and hold them accountable for their mistakes.

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.

ZMP center controller reported the adjacent center was handing three aircraft off that were on conflicting headings and in an overtake situation.