Close proximity air carrier-medium large transport unk aircraft in climb.

Attributes
ACN	103728
Time
Date	198902
Day	Thu
Local Time Of Day	1801 To 2400
Place
Locale Reference	atc facility : pie
State Reference	FL
Altitude	msl bound lower : 11700 msl bound upper : 13000
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 206 flight time total : 7784
ASRS Report	103728
Person 2
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	Other
Miss Distance	horizontal : 1000 vertical : 700
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Error

Narrative:

We had been cleared to 11000' by first controller. Passing 12000' the controller advised us to stop descent and climb to 13000'. He also pointed out the traffic in conflict. We had the aircraft in sight as we climbed. This could have been a real close near miss had the second controller not caught the mistake.

Original NASA ASRS Text

Title: CLOSE PROX ACR-MLG UNK ACFT IN CLIMB.

Narrative: WE HAD BEEN CLRED TO 11000' BY FIRST CTLR. PASSING 12000' THE CTLR ADVISED US TO STOP DSCNT AND CLB TO 13000'. HE ALSO POINTED OUT THE TFC IN CONFLICT. WE HAD THE ACFT IN SIGHT AS WE CLBED. THIS COULD HAVE BEEN A REAL CLOSE NEAR MISS HAD THE SECOND CTLR NOT CAUGHT THE MISTAKE.

Data retrieved from NASA's ASRS site as of August 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.