Narrative:

Aircraft X and aircraft Y were a flight of two operating as a flight with aircraft X as the lead aircraft and orbiting within 50NM of the unz VORTAC in block altitude fl240b250. Aircraft Y calls on frequency requesting a separate clearance for orbit within 50NM of unz at flight level 260. I observe a primary target about 10 miles away from aircraft X and moving in the opposite direction. I ask aircraft Y their current altitude and they reply 'FL250.' I advise aircraft Y to climb and maintain FL260 and report level at that altitude.aircraft Y reports level at FL260 and they are radar and given their clearance to orbit the unz VORTAC within 50NM at FL260. I then advise both aircraft that they must call and request with ZUA center for a fight split prior to separating the formation. Supervisor is notified of the incident and I am advised to give a brasher warning to both aircraft for possible pilot deviation and to call ZUA center upon landing.the aircraft/pilots need to understand that they are operating in class a controlled airspace on IFR flight plans and must comply with all ATC instructions and procedures to operate in class a airspace.

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Original NASA ASRS Text

Title: ZUA Controller describes a flight split up where the second aircraft is already separated from the flight lead.

Narrative: Aircraft X and Aircraft Y were a flight of two operating as a flight with Aircraft X as the lead aircraft and orbiting within 50NM of the UNZ VORTAC in Block Altitude FL240B250. Aircraft Y calls on frequency requesting a separate clearance for orbit within 50NM of UNZ at Flight Level 260. I observe a primary target about 10 miles away from Aircraft X and moving in the opposite direction. I ask Aircraft Y their current altitude and they reply 'FL250.' I advise Aircraft Y to climb and maintain FL260 and report level at that altitude.Aircraft Y reports level at FL260 and they are radar and given their clearance to orbit the UNZ VORTAC within 50NM at FL260. I then advise both aircraft that they must call and request with ZUA center for a fight split prior to separating the formation. Supervisor is notified of the incident and I am advised to give a Brasher warning to both aircraft for possible pilot deviation and to call ZUA center upon landing.The aircraft/pilots need to understand that they are operating in Class A controlled airspace on IFR flight plans and must comply with all ATC instructions and procedures to operate in Class A airspace.

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.