Less than standard separation between MTR and small aircraft. Operational error.

Attributes
ACN	105522
Time
Date	198903
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pwa
State Reference	OK
Altitude	msl bound lower : 2700 msl bound upper : 3000
Environment
Flight Conditions	Marginal
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : okc tower : pwa tower : bil
Operator	other
Make Model Name	Military Trainer
Flight Phase	climbout : intermediate altitude landing : missed approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Make Model Name	Small Aircraft, High Wing, 1 Eng, Fixed Gear
Flight Phase	climbout : intermediate altitude
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local
Qualification	controller : non radar
Experience	controller non radar : 1
ASRS Report	105522
Person 2
Affiliation	government : faa
Function	controller : departure
Qualification	controller : radar
Events
Anomaly	conflict : airborne less severe non adherence : required legal separation other spatial deviation
Independent Detector	other other : unspecified atc
Resolutory Action	controller : issued new clearance none taken : insufficient time none taken : unable
Consequence	faa : investigated
Miss Distance	horizontal : 3000 vertical : 300
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Operational Error Inter Facility Coordination Failure

Narrative:

MTR X was on ILS approach. Small aircraft Y was released for IFR departure. Small aircraft Y cleared for takeoff with initial heading of 200 degrees. X had been issued missed approach instruction of 260 degrees. Approach control advised tower to issue 190 degree heading. Tower issued, 'fly heading 190 degrees and contact approach.' X did not verbally acknowledge tower visually watched MTR X. Aircraft appeared to be on correct heading until out of visibility range. X turned to 260 degrees south of the airport and switched frequencys. Approximately 3 mi southwest of airport X target and Y target merged. X was issued new heading and climb instruction and advised of traffic in immediate vicinity. To avoid recurrence: never issue heading or altitude instructions with frequency change instructions in same transmission. Always get verbal acknowledgement of such instructions. If none are received, coordinate with receiving facility. Callback conversation with reporter revealed the following: reporter gave ATC experience. Not sure how close aircraft got to each other. Altitude of both was approximately 3000'. Aircraft Y had departed runway 17. Military aircraft was on UHF. Local controller was transmitting UHF VHF simultaneously. Pwa tower has BRITE scope from okc radar.

Original NASA ASRS Text

Title: LESS THAN STANDARD SEPARATION BETWEEN MTR AND SMA. OPERATIONAL ERROR.

Narrative: MTR X WAS ON ILS APCH. SMA Y WAS RELEASED FOR IFR DEP. SMA Y CLRED FOR TKOF WITH INITIAL HDG OF 200 DEGS. X HAD BEEN ISSUED MISSED APCH INSTRUCTION OF 260 DEGS. APCH CTL ADVISED TWR TO ISSUE 190 DEG HDG. TWR ISSUED, 'FLY HDG 190 DEGS AND CONTACT APCH.' X DID NOT VERBALLY ACKNOWLEDGE TWR VISUALLY WATCHED MTR X. ACFT APPEARED TO BE ON CORRECT HDG UNTIL OUT OF VIS RANGE. X TURNED TO 260 DEGS S OF THE ARPT AND SWITCHED FREQS. APPROX 3 MI SW OF ARPT X TARGET AND Y TARGET MERGED. X WAS ISSUED NEW HDG AND CLB INSTRUCTION AND ADVISED OF TFC IN IMMEDIATE VICINITY. TO AVOID RECURRENCE: NEVER ISSUE HDG OR ALT INSTRUCTIONS WITH FREQ CHANGE INSTRUCTIONS IN SAME XMISSION. ALWAYS GET VERBAL ACKNOWLEDGEMENT OF SUCH INSTRUCTIONS. IF NONE ARE RECEIVED, COORDINATE WITH RECEIVING FAC. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING: RPTR GAVE ATC EXPERIENCE. NOT SURE HOW CLOSE ACFT GOT TO EACH OTHER. ALT OF BOTH WAS APPROX 3000'. ACFT Y HAD DEPARTED RWY 17. MIL ACFT WAS ON UHF. LCL CTLR WAS XMITTING UHF VHF SIMULTANEOUSLY. PWA TWR HAS BRITE SCOPE FROM OKC RADAR.

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.