Flight of 2 fgt's aircraft descended below assigned block altitude. Possible conflict with IFR traff...

Attributes
ACN	87549
Time
Date	198805
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ilm
State Reference	NC
Altitude	msl bound lower : 9000 msl bound upper : 10000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zdc
Operator	other
Make Model Name	Fighter
Flight Phase	cruise other descent other
Route In Use	enroute airway : zdc
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : radar
Qualification	controller : radar
Experience	controller non radar : 2 controller radar : 2
ASRS Report	87549
Person 2
Function	flight crew : single pilot
Qualification	pilot : military
Events
Anomaly	airspace violation : exit altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	other controllera
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

Military X, a flight of 2 fgt's, was cleared into gamecock a MOA to maintain block altitudes 10000' through FL190 (there was traffic at 9000' and FL200). Flight X left the frequency and within 2 mins was squawking 4000--normal procedure. Fgt X then proceeded to leave the MOA and descend below his assigned altitude, in close proximity to the traffic at 9000'. Fgt X was contacted on guard and questioned about his action, whereupon, he replied he had gone VFR. Fgt X was advised that he must report his cancellation to center before departing the MOA and his assigned altitude.

Original NASA ASRS Text

Title: FLT OF 2 FGT'S ACFT DESCENDED BELOW ASSIGNED BLOCK ALT. POSSIBLE CONFLICT WITH IFR TRAFFIC. SPILLOUT.

Narrative: MIL X, A FLT OF 2 FGT'S, WAS CLRED INTO GAMECOCK A MOA TO MAINTAIN BLOCK ALTS 10000' THROUGH FL190 (THERE WAS TFC AT 9000' AND FL200). FLT X LEFT THE FREQ AND WITHIN 2 MINS WAS SQUAWKING 4000--NORMAL PROC. FGT X THEN PROCEEDED TO LEAVE THE MOA AND DSND BELOW HIS ASSIGNED ALT, IN CLOSE PROX TO THE TFC AT 9000'. FGT X WAS CONTACTED ON GUARD AND QUESTIONED ABOUT HIS ACTION, WHEREUPON, HE REPLIED HE HAD GONE VFR. FGT X WAS ADVISED THAT HE MUST RPT HIS CANCELLATION TO CENTER BEFORE DEPARTING THE MOA AND HIS ASSIGNED 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.

Flight of 2 fgt's aircraft descended below assigned block altitude. Possible conflict with IFR traffic. Spillout.