Fgt descended through altitude occupied by another aircraft.

Attributes
ACN	111346
Time
Date	198905
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : vad
State Reference	GA
Altitude	msl bound lower : 31000 msl bound upper : 33000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	other
Make Model Name	Fighter
Flight Phase	descent other
Flight Plan	IFR
Aircraft 2
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller military : 4 controller radar : 3
ASRS Report	111346
Person 2
Affiliation	government : military
Function	flight crew : single pilot
Qualification	pilot : military
Events
Anomaly	altitude deviation : undershoot conflict : airborne less severe non adherence : clearance other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 12000 vertical : 500
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier aircraft southbound on J89 to gnv at FL330. Flight of fgt's en route to pam were given a descent clearance to FL310 and reported level FL310 7 mi from the southbound air carrier. The air carrier reported that the last aircraft in the flight was too close. In my opinion, when the flight lead reported level, not all aircraft in the flight were level. The last aircraft was still descending through the air carrier's altitude.

Original NASA ASRS Text

Title: FGT DESCENDED THROUGH ALT OCCUPIED BY ANOTHER ACFT.

Narrative: ACR ACFT SBND ON J89 TO GNV AT FL330. FLT OF FGT'S ENRTE TO PAM WERE GIVEN A DSCNT CLRNC TO FL310 AND RPTED LEVEL FL310 7 MI FROM THE SBND ACR. THE ACR RPTED THAT THE LAST ACFT IN THE FLT WAS TOO CLOSE. IN MY OPINION, WHEN THE FLT LEAD RPTED LEVEL, NOT ALL ACFT IN THE FLT WERE LEVEL. THE LAST ACFT WAS STILL DSNDING THROUGH THE ACR'S ALT.

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.