 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Tower operating with split local controller position. Controller working runway 18R traffic cleared a DH8 for takeoff at the same time the local controller for runway 23 cleared a BE36 for takeoff. Aircraft took evasive action after TA was given and had an near midair collision. Local controller working the DH8 misinterpreted a comment from the cabin attendant coordinator.
| Attributes | |
| ACN | 384164 |
| Time | |
| Date | 199710 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : clt |
| State Reference | NC |
| Altitude | agl bound lower : 200 agl bound upper : 400 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : clt |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8 Series Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff climbout : initial |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | general aviation : personal |
| Make Model Name | Bonanza 36 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : takeoff climbout : initial |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Experience | controller military : 7 controller non radar : 11 controller radar : 10 controller supervisory : 6 |
| ASRS Report | 384164 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : local |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : nmac non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 200 vertical : 25 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Intra Facility Coordination Failure |
Narrative:
Aircraft #1 was awaiting departure on runway 18R. Aircraft #2 was scheduled to depart runway 23 (a converging runway) prior to the DH8 on runway 18R. I believed that the coordination had been changed, and that the BE36 would depart after the DH8 on runway 18R. I issued a takeoff clearance to the DH8 on runway 18R. After aircraft #1 rotated, I observed aircraft #2 airborne and converging with aircraft #1. I immediately issued traffic to aircraft #1. Both aircraft commenced a hard right turn. Aircraft #2 was being worked by another local controller. I believe that incomplete coordination contributed to this occurrence. The phrase 'I believe that you can get your DH8 out too' by the coordinator, led me to believe that the original departure sequence had been changed. My failure to confirm this fact contributed to the breakdown in communication. Supplemental information from acn 383987: departing runway 18R at clt. Just after lift-off the tower controller reported traffic at our 12 O'clock position, less than 1 mi. We looked ahead and saw an aircraft right in front of us at our altitude. He appeared to be in a climbing right turn. We were about 200-300 ft. I made a sharp right turn possibly 50-60 degree bank to avoid the other aircraft. I don't know how we missed each other. After a couple of seconds I looked again for the aircraft and didn't see it. So I rolled to wings level and continued the departure. The tower controller said that the aircraft had departed another runway heading our direction.
Original NASA ASRS Text
Title: TWR OPERATING WITH SPLIT LCL CTLR POS. CTLR WORKING RWY 18R TFC CLRED A DH8 FOR TKOF AT THE SAME TIME THE LCL CTLR FOR RWY 23 CLRED A BE36 FOR TKOF. ACFT TOOK EVASIVE ACTION AFTER TA WAS GIVEN AND HAD AN NMAC. LCL CTLR WORKING THE DH8 MISINTERPRETED A COMMENT FROM THE CAB COORDINATOR.
Narrative: ACFT #1 WAS AWAITING DEP ON RWY 18R. ACFT #2 WAS SCHEDULED TO DEPART RWY 23 (A CONVERGING RWY) PRIOR TO THE DH8 ON RWY 18R. I BELIEVED THAT THE COORD HAD BEEN CHANGED, AND THAT THE BE36 WOULD DEPART AFTER THE DH8 ON RWY 18R. I ISSUED A TKOF CLRNC TO THE DH8 ON RWY 18R. AFTER ACFT #1 ROTATED, I OBSERVED ACFT #2 AIRBORNE AND CONVERGING WITH ACFT #1. I IMMEDIATELY ISSUED TFC TO ACFT #1. BOTH ACFT COMMENCED A HARD R TURN. ACFT #2 WAS BEING WORKED BY ANOTHER LCL CTLR. I BELIEVE THAT INCOMPLETE COORD CONTRIBUTED TO THIS OCCURRENCE. THE PHRASE 'I BELIEVE THAT YOU CAN GET YOUR DH8 OUT TOO' BY THE COORDINATOR, LED ME TO BELIEVE THAT THE ORIGINAL DEP SEQUENCE HAD BEEN CHANGED. MY FAILURE TO CONFIRM THIS FACT CONTRIBUTED TO THE BREAKDOWN IN COM. SUPPLEMENTAL INFO FROM ACN 383987: DEPARTING RWY 18R AT CLT. JUST AFTER LIFT-OFF THE TWR CTLR RPTED TFC AT OUR 12 O'CLOCK POS, LESS THAN 1 MI. WE LOOKED AHEAD AND SAW AN ACFT RIGHT IN FRONT OF US AT OUR ALT. HE APPEARED TO BE IN A CLBING R TURN. WE WERE ABOUT 200-300 FT. I MADE A SHARP R TURN POSSIBLY 50-60 DEG BANK TO AVOID THE OTHER ACFT. I DON'T KNOW HOW WE MISSED EACH OTHER. AFTER A COUPLE OF SECONDS I LOOKED AGAIN FOR THE ACFT AND DIDN'T SEE IT. SO I ROLLED TO WINGS LEVEL AND CONTINUED THE DEP. THE TWR CTLR SAID THAT THE ACFT HAD DEPARTED ANOTHER RWY HEADING OUR DIRECTION.
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.