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An aircraft passed over and behind another aircraft that had departed from non intersecting runway but is 90 degree diagonal to the other runway.
| Attributes | |
| ACN | 151886 |
| Time | |
| Date | 199007 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : mem |
| State Reference | TN |
| Altitude | msl bound lower : 600 msl bound upper : 900 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : mem |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude climbout : takeoff |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 270 flight time total : 17000 flight time type : 14000 |
| ASRS Report | 151886 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : atp |
| Experience | flight time last 90 days : 190 flight time total : 6000 flight time type : 2200 |
| ASRS Report | 150920 |
| Events | |
| Anomaly | conflict : nmac non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 200 vertical : 400 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure Operational Error |
Narrative:
Cleared to takeoff runway 36L at mem. At about 700-800' passed above a widebody transport which had taken off from runway 27. Missed by approximately 400' vertical. We were unaware of the widebody transport until liftoff. We did not see him on roll because view of runway 27 is blocked by bldgs. ZME tower use split tower frequencys and he was on other frequency. We were lucky we had a light aircraft with big engines. Of course the tower had no idea of either plane's climb performance. If we had lost an engine or had been heavy, we'd have hit him. This is the second time in a month split frequencys and poor coordination in mem tower have put us in position to hit another aircraft. Lack of coordination causes midairs. If they don't stop controling like a bunch of cowboys, they'll do it again.
Original NASA ASRS Text
Title: AN ACFT PASSED OVER AND BEHIND ANOTHER ACFT THAT HAD DEPARTED FROM NON INTERSECTING RWY BUT IS 90 DEGREE DIAGONAL TO THE OTHER RWY.
Narrative: CLRED TO TKOF RWY 36L AT MEM. AT ABOUT 700-800' PASSED ABOVE A WDB WHICH HAD TAKEN OFF FROM RWY 27. MISSED BY APPROX 400' VERT. WE WERE UNAWARE OF THE WDB UNTIL LIFTOFF. WE DID NOT SEE HIM ON ROLL BECAUSE VIEW OF RWY 27 IS BLOCKED BY BLDGS. ZME TWR USE SPLIT TWR FREQS AND HE WAS ON OTHER FREQ. WE WERE LUCKY WE HAD A LIGHT ACFT WITH BIG ENGINES. OF COURSE THE TWR HAD NO IDEA OF EITHER PLANE'S CLB PERFORMANCE. IF WE HAD LOST AN ENG OR HAD BEEN HEAVY, WE'D HAVE HIT HIM. THIS IS THE SECOND TIME IN A MONTH SPLIT FREQS AND POOR COORD IN MEM TWR HAVE PUT US IN POS TO HIT ANOTHER ACFT. LACK OF COORD CAUSES MIDAIRS. IF THEY DON'T STOP CTLING LIKE A BUNCH OF COWBOYS, THEY'LL DO IT AGAIN.
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.