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ATCT local controller had less than standard separation between arrival and departure medium large transport aircraft.
| Attributes | |
| ACN | 91315 |
| Time | |
| Date | 198807 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : bna |
| State Reference | IN |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | landing other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| ASRS Report | 91315 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : non radar |
| Events | |
| Anomaly | conflict : ground less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | horizontal : 4000 vertical : 0 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
Medium large transport X was cleared for immediate takeoff on runway 31. Medium large transport Y was on 2 1/2 mi final runway 2L. Medium large transport X did not accelerate as expected. Medium large transport Y crossed landing threshold prior to medium large transport X clearing the runway intersection. When I realized the situation I decided it would be safer for all concerned to let the medium large transport Y land, therefore not having 2 airplanes in the same airspace at the same time. Contributing factors were the pilot's failure to accelerate the medium large transport X in the manner expected by the local controller. I was also in the process of a position relief briefing at the time. I believe the situation occurred because of the pressure put on the controllers by the front office of this facility to eliminate delays and the constant harassment by the chief and deputy chief to tighten up the final while still expecting the tower to get one out between each arrival.
Original NASA ASRS Text
Title: ATCT LCL CTLR HAD LESS THAN STANDARD SEPARATION BETWEEN ARR AND DEP MLG ACFT.
Narrative: MLG X WAS CLRED FOR IMMEDIATE TKOF ON RWY 31. MLG Y WAS ON 2 1/2 MI FINAL RWY 2L. MLG X DID NOT ACCELERATE AS EXPECTED. MLG Y CROSSED LNDG THRESHOLD PRIOR TO MLG X CLRING THE RWY INTXN. WHEN I REALIZED THE SITUATION I DECIDED IT WOULD BE SAFER FOR ALL CONCERNED TO LET THE MLG Y LAND, THEREFORE NOT HAVING 2 AIRPLANES IN THE SAME AIRSPACE AT THE SAME TIME. CONTRIBUTING FACTORS WERE THE PLT'S FAILURE TO ACCELERATE THE MLG X IN THE MANNER EXPECTED BY THE LCL CTLR. I WAS ALSO IN THE PROCESS OF A POS RELIEF BRIEFING AT THE TIME. I BELIEVE THE SITUATION OCCURRED BECAUSE OF THE PRESSURE PUT ON THE CTLRS BY THE FRONT OFFICE OF THIS FAC TO ELIMINATE DELAYS AND THE CONSTANT HARASSMENT BY THE CHIEF AND DEPUTY CHIEF TO TIGHTEN UP THE FINAL WHILE STILL EXPECTING THE TWR TO GET ONE OUT BTWN EACH ARR.
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.