Fgt did not acknowledge for altitude restriction and conflicted with another aircraft.

Attributes
ACN	112975
Time
Date	198906
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : flo
State Reference	SC
Altitude	msl bound lower : 21300 msl bound upper : 22000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx artcc : zdc
Operator	other
Make Model Name	Fighter
Flight Phase	climbout : intermediate altitude
Route In Use	departure other
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Fighter
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 1 controller radar : 13
ASRS Report	112975
Person 2
Affiliation	government : military
Function	flight crew : captain oversight : pic
Qualification	pilot : military
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation non adherence : published procedure other anomaly other
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance other
Consequence	faa : investigated
Miss Distance	horizontal : 16200 vertical : 400
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Radar OJT in progress. Fgt X departed shaw AFB eastbound, after some communication problems. I established 2-WAY communication and fgt X was climbing to FL230. I took handoff on fgt Y at FL220 wbound to shaw AFB and I amended fgt X to FL210 (fgt X was still in a climb) and I received a 'roger' my trainee called traffic to fgt X, but he did not reply. Fgt Y then replied 'radar-tally'. Fgt X's mode C showed FL213 and I radio checked and advised him to maintain FL210, and fgt Y to climb to FL230. 3 controllers heard a 'roger' after fgt X was given an amended clearance and everything was 'by the book'. Listening to playback tape numerous times, it was determined the 'roger' was not a roger, but another aircraft ending his transmission. When fgt X did not reply to traffic call another call should have been made.

Original NASA ASRS Text

Title: FGT DID NOT ACKNOWLEDGE FOR ALT RESTRICTION AND CONFLICTED WITH ANOTHER ACFT.

Narrative: RADAR OJT IN PROGRESS. FGT X DEPARTED SHAW AFB EBND, AFTER SOME COM PROBLEMS. I ESTABLISHED 2-WAY COM AND FGT X WAS CLIMBING TO FL230. I TOOK HANDOFF ON FGT Y AT FL220 WBOUND TO SHAW AFB AND I AMENDED FGT X TO FL210 (FGT X WAS STILL IN A CLIMB) AND I RECEIVED A 'ROGER' MY TRAINEE CALLED TFC TO FGT X, BUT HE DID NOT REPLY. FGT Y THEN REPLIED 'RADAR-TALLY'. FGT X'S MODE C SHOWED FL213 AND I RADIO CHECKED AND ADVISED HIM TO MAINTAIN FL210, AND FGT Y TO CLIMB TO FL230. 3 CTLRS HEARD A 'ROGER' AFTER FGT X WAS GIVEN AN AMENDED CLRNC AND EVERYTHING WAS 'BY THE BOOK'. LISTENING TO PLAYBACK TAPE NUMEROUS TIMES, IT WAS DETERMINED THE 'ROGER' WAS NOT A ROGER, BUT ANOTHER ACFT ENDING HIS XMISSION. WHEN FGT X DID NOT REPLY TO TFC CALL ANOTHER CALL SHOULD HAVE BEEN MADE.

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.