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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Air carrier X overtakes air carrier Y after departure, had less than standard separation. System error.
| Attributes | |
| ACN | 197724 |
| Time | |
| Date | 199112 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : ewr |
| State Reference | NJ |
| Altitude | msl bound lower : 4800 msl bound upper : 5000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : n90 tower : ewr |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : sid |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 80 flight time total : 18000 flight time type : 80 |
| ASRS Report | 197724 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance other |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X, widebody transport, was cleared for takeoff at ewr runway 22R ewr 4 departure. We were preceded by air carrier Y, medium large transport. Ewr tower cleared us for takeoff immediately after air carrier Y flight was airborne. We were flying a very light widebody transport. Our performance was such that at 4500 ft the departure controller wanted us to level at 4500, instead of 5000 as cleared on the ewr 4 departure. Evidently we had outclbed air carrier Y ahead of us and we had a visual sighting of the aircraft ahead of us probably less than 1 NM distance. We were able to level our aircraft at 4800 ft. We were given a north heading 360 degrees. Air carrier Y continued swbound and as the 2 aircraft separated further we were given clearance to 6000. No further conflict. We were given clearance to takeoff too close behind a lesser performing aircraft. In the future I should advise the tower of our performance and ask if applicable for a short delay in takeoff clearance.
Original NASA ASRS Text
Title: ACR X OVERTAKES ACR Y AFTER DEP, HAD LTSS. SYS ERROR.
Narrative: ACR X, WDB, WAS CLRED FOR TKOF AT EWR RWY 22R EWR 4 DEP. WE WERE PRECEDED BY ACR Y, MLG. EWR TWR CLRED US FOR TKOF IMMEDIATELY AFTER ACR Y FLT WAS AIRBORNE. WE WERE FLYING A VERY LIGHT WDB. OUR PERFORMANCE WAS SUCH THAT AT 4500 FT THE DEP CTLR WANTED US TO LEVEL AT 4500, INSTEAD OF 5000 AS CLRED ON THE EWR 4 DEP. EVIDENTLY WE HAD OUTCLBED ACR Y AHEAD OF US AND WE HAD A VISUAL SIGHTING OF THE ACFT AHEAD OF US PROBABLY LESS THAN 1 NM DISTANCE. WE WERE ABLE TO LEVEL OUR ACFT AT 4800 FT. WE WERE GIVEN A N HDG 360 DEGS. ACR Y CONTINUED SWBOUND AND AS THE 2 ACFT SEPARATED FURTHER WE WERE GIVEN CLRNC TO 6000. NO FURTHER CONFLICT. WE WERE GIVEN CLRNC TO TKOF TOO CLOSE BEHIND A LESSER PERFORMING ACFT. IN THE FUTURE I SHOULD ADVISE THE TWR OF OUR PERFORMANCE AND ASK IF APPLICABLE FOR A SHORT DELAY IN TKOF CLRNC.
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.