Opposite direction approach MTR Y had less than standard separation from air carrier X. System error...

Attributes
ACN	218829
Time
Date	199208
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : law
State Reference	OK
Altitude	msl bound lower : 2000 msl bound upper : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : fsi tower : law tower : pit
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Flight Phase	climbout : initial
Route In Use	enroute : on vectors
Flight Plan	IFR
Aircraft 2
Operator	other
Make Model Name	Military Trainer
Flight Phase	descent : approach
Route In Use	enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	government : faa
Function	controller : local instruction : instructor
Qualification	controller : non radar
ASRS Report	218829
Person 2
Affiliation	government : faa
Function	controller : local instruction : trainee
Qualification	controller : developmental
Events
Anomaly	conflict : airborne less severe non adherence : published procedure non adherence : required legal separation
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	Other
Miss Distance	horizontal : 6000 vertical : 0
Supplementary
Primary Problem	ATC Human Performance
Air Traffic Incident	Intra Facility Coordination Failure Operational Error

Narrative:

Air carrier X was ready for IFR departure off runway 17. Inbound traffic was numerous mtrs on practice ILS approachs to runway 35. I was the local controller monitoring an OJT (training) session. The trainee requested an IFR release from fsi approach and was given a release reference an MTR on approach and a void time. The void time was not written down. (I did not hear the conversation. Interphone confign makes it difficult to monitor). The trainee advised that air carrier X would be after MTR and that MTR would be turned early to facilitate air carrier X departure and was given climb out instructions for MTR. Additional traffic was an MTR Y on a surveillance approach to runway 35. We were told that he was at 7 military. Air carrier X was cleared for takeoff (the void time had passed). Before air carrier X was airborne, fsi approach called for clearance on the surveillance at 4 mi. This was less than 1 min after getting the 7 mi report. Factors: lawton tower does not have radar, visibility was reduced due to haze, training in progress, and poor interphone arrangement. Suggestions to prevent recurrence: improve communication equipment at lawton (scheduled for fall 1992). Clarify information -- both tower and approach (discussed between instructor and trainee, lessons learned).

Original NASA ASRS Text

Title: OPPOSITE DIRECTION APCH MTR Y HAD LTSS FROM ACR X. SYS ERROR.

Narrative: ACR X WAS READY FOR IFR DEP OFF RWY 17. INBOUND TFC WAS NUMEROUS MTRS ON PRACTICE ILS APCHS TO RWY 35. I WAS THE LCL CTLR MONITORING AN OJT (TRAINING) SESSION. THE TRAINEE REQUESTED AN IFR RELEASE FROM FSI APCH AND WAS GIVEN A RELEASE REF AN MTR ON APCH AND A VOID TIME. THE VOID TIME WAS NOT WRITTEN DOWN. (I DID NOT HEAR THE CONVERSATION. INTERPHONE CONFIGN MAKES IT DIFFICULT TO MONITOR). THE TRAINEE ADVISED THAT ACR X WOULD BE AFTER MTR AND THAT MTR WOULD BE TURNED EARLY TO FACILITATE ACR X DEP AND WAS GIVEN CLB OUT INSTRUCTIONS FOR MTR. ADDITIONAL TFC WAS AN MTR Y ON A SURVEILLANCE APCH TO RWY 35. WE WERE TOLD THAT HE WAS AT 7 MIL. ACR X WAS CLRED FOR TKOF (THE VOID TIME HAD PASSED). BEFORE ACR X WAS AIRBORNE, FSI APCH CALLED FOR CLRNC ON THE SURVEILLANCE AT 4 MI. THIS WAS LESS THAN 1 MIN AFTER GETTING THE 7 MI RPT. FACTORS: LAWTON TWR DOES NOT HAVE RADAR, VISIBILITY WAS REDUCED DUE TO HAZE, TRAINING IN PROGRESS, AND POOR INTERPHONE ARRANGEMENT. SUGGESTIONS TO PREVENT RECURRENCE: IMPROVE COM EQUIP AT LAWTON (SCHEDULED FOR FALL 1992). CLARIFY INFO -- BOTH TWR AND APCH (DISCUSSED BTWN INSTRUCTOR AND TRAINEE, LESSONS LEARNED).

Data retrieved from NASA's ASRS site as of July 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.