 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
ATCT local controller clears LR35 flight crew for takeoff behind B737. TRACON controller issues vector to LR35, but is unable to attain legal separation.
| Attributes | |
| ACN | 421428 |
| Time | |
| Date | 199811 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : dal |
| State Reference | TX |
| Altitude | msl bound lower : 3000 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : sea |
| Operator | common carrier : air taxi |
| Make Model Name | Learjet 35 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : takeoff climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| ASRS Report | 421428 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera other flight crewa |
| Consequence | Other |
| Miss Distance | horizontal : 17400 |
| Supplementary | |
| Air Traffic Incident | Operational Error Inter Facility Coordination Failure |
Narrative:
We were holding in position on runway 13L dal, and tower advised us of traffic we were following off runway 13R. The runway 13R (B737) aircraft took off and went through a cloud layer. Tower cleared us to take off on runway 13L and on climb out approach control asked if we had a visual on traffic at 12 O'clock. They gave us a turn to the south and questioned us about the tower giving us a takeoff clearance without a visual on the B737. The problem was dal tower clearing us for takeoff without a visual on the B737. We could not see the B737 in our climb out. The B737 couldn't see us because we were behind him. I really don't have a good solution to this one except to really watch what's going on after popping out of a cloud deck.
Original NASA ASRS Text
Title: ATCT LCL CTLR CLRS LR35 FLC FOR TKOF BEHIND B737. TRACON CTLR ISSUES VECTOR TO LR35, BUT IS UNABLE TO ATTAIN LEGAL SEPARATION.
Narrative: WE WERE HOLDING IN POS ON RWY 13L DAL, AND TWR ADVISED US OF TFC WE WERE FOLLOWING OFF RWY 13R. THE RWY 13R (B737) ACFT TOOK OFF AND WENT THROUGH A CLOUD LAYER. TWR CLRED US TO TAKE OFF ON RWY 13L AND ON CLBOUT APCH CTL ASKED IF WE HAD A VISUAL ON TFC AT 12 O'CLOCK. THEY GAVE US A TURN TO THE S AND QUESTIONED US ABOUT THE TWR GIVING US A TKOF CLRNC WITHOUT A VISUAL ON THE B737. THE PROB WAS DAL TWR CLRING US FOR TKOF WITHOUT A VISUAL ON THE B737. WE COULD NOT SEE THE B737 IN OUR CLBOUT. THE B737 COULDN'T SEE US BECAUSE WE WERE BEHIND HIM. I REALLY DON'T HAVE A GOOD SOLUTION TO THIS ONE EXCEPT TO REALLY WATCH WHAT'S GOING ON AFTER POPPING OUT OF A CLOUD DECK.
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.