Less than standard separation between flight of 2 fgt aircraft and GA-twin on approach.

Attributes
ACN	80034
Time
Date	198801
Day	Tue
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : stl
State Reference	MO
Altitude	msl bound lower : 2000 msl bound upper : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : stl tower : stl
Operator	other
Make Model Name	Fighter
Flight Phase	climbout : intermediate altitude landing : missed approach other
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	general aviation : corporate
Make Model Name	Small Transport, Low Wing, 2 Recip Eng
Flight Phase	descent : approach descent other other
Route In Use	enroute : on vectors
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
ASRS Report	80034
Person 2
Function	oversight : supervisor
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	controller : issued new clearance none taken : insufficient time
Consequence	faa : investigated
Miss Distance	unspecified : 500 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error

Narrative:

Aircraft X on final for runway 30L (flight of 2) missed approach 3/4 mi final. Tower had departure traffic off the left runway and right runway. Tower issued standard missed approach altitude of 2500' MSL and a turn to heading 350 degrees to avoid departure traffic. The cc instructed local control to change the missed approach to approach. Local control complied. The low altitude controller had GA twin Y for runway 24 turning final at 2000'. The X flight leveled at 2500' and turned sharply to heading 350 degrees. Due to the sharp turn, the flight was on a path converging on the arriving aircraft Y. Visual sep was obtained from aircraft Y. The flight flew 500' above Y. West/O the visual sep, there was no IFR sep. Stl is already re-evaluating the standard 2500' missed approach altitude and looking at utilizing 3000' to insure the 1000' necessary for IFR sep.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION BETWEEN FLT OF 2 FGT ACFT AND GA-TWIN ON APCH.

Narrative: ACFT X ON FINAL FOR RWY 30L (FLT OF 2) MISSED APCH 3/4 MI FINAL. TWR HAD DEP TFC OFF THE LEFT RWY AND RIGHT RWY. TWR ISSUED STANDARD MISSED APCH ALT OF 2500' MSL AND A TURN TO HDG 350 DEGS TO AVOID DEP TFC. THE CC INSTRUCTED LCL CTL TO CHANGE THE MISSED APCH TO APCH. LCL CTL COMPLIED. THE LOW ALT CTLR HAD GA TWIN Y FOR RWY 24 TURNING FINAL AT 2000'. THE X FLT LEVELED AT 2500' AND TURNED SHARPLY TO HDG 350 DEGS. DUE TO THE SHARP TURN, THE FLT WAS ON A PATH CONVERGING ON THE ARRIVING ACFT Y. VISUAL SEP WAS OBTAINED FROM ACFT Y. THE FLT FLEW 500' ABOVE Y. W/O THE VISUAL SEP, THERE WAS NO IFR SEP. STL IS ALREADY RE-EVALUATING THE STANDARD 2500' MISSED APCH ALT AND LOOKING AT UTILIZING 3000' TO INSURE THE 1000' NECESSARY FOR IFR SEP.

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.