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Less than standard separation when air carrier-widebody transport climbed through the altitude of air carrier-widebody transport with less than required lateral separation.
| Attributes | |
| ACN | 92694 |
| Time | |
| Date | 198808 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : fmg |
| State Reference | NV |
| Altitude | msl bound lower : 31000 msl bound upper : 32300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa artcc : zfw |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct enroute : on vectors enroute airway : j7 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 1 flight time last 90 days : 0 flight time total : 200 flight time type : 0 |
| ASRS Report | 92694 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance none taken : insufficient time other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 25000 vertical : 1300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Widebody transport X sfo direct czi-1-ewr was northeast bound climbing to FL330. Widebody transport Z was FL310, J7 fmg J7 reo-1-yyc. When judging climb rate, it seemed there would be no factor. Widebody transport X's climb began to flatten out at about FL300. Turns were issued to both aircraft, mainly to buy time until widebody transport X was level. When it became obvious that widebody transport X was not going to reach FL330, further turns were issued. Turns were insufficient for sep.
Original NASA ASRS Text
Title: LESS THAN STANDARD SEPARATION WHEN ACR-WDB CLIMBED THROUGH THE ALT OF ACR-WDB WITH LESS THAN REQUIRED LATERAL SEPARATION.
Narrative: WDB X SFO DIRECT CZI-1-EWR WAS NE BOUND CLBING TO FL330. WDB Z WAS FL310, J7 FMG J7 REO-1-YYC. WHEN JUDGING CLB RATE, IT SEEMED THERE WOULD BE NO FACTOR. WDB X'S CLB BEGAN TO FLATTEN OUT AT ABOUT FL300. TURNS WERE ISSUED TO BOTH ACFT, MAINLY TO BUY TIME UNTIL WDB X WAS LEVEL. WHEN IT BECAME OBVIOUS THAT WDB X WAS NOT GOING TO REACH FL330, FURTHER TURNS WERE ISSUED. TURNS WERE INSUFFICIENT FOR SEP.
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.