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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Reported operational error between an air carrier EA32 and a cargo LR25 when the climbing lear jet failed to reach assigned altitude above the EA32 before altitude separation was lost.
| Attributes | |
| ACN | 365391 |
| Time | |
| Date | 199704 |
| Day | Tue |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : ape |
| State Reference | OH |
| Altitude | msl bound lower : 37000 msl bound upper : 39000 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid tower : phl |
| Operator | common carrier : air taxi |
| Make Model Name | Learjet 25 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | A320 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller military : 4 controller radar : 4 |
| ASRS Report | 365391 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified |
| Resolutory Action | none taken : insufficient time |
| Consequence | Other |
| Miss Distance | horizontal : 16800 vertical : 1500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Controller recognized air carrier Y and air carrier X as traffic, but anticipated the lear to reach FL390 in ample time. 2 other lear jets were following air carrier X to sdf, so controller turned air carrier X direct yrk to increase spacing between them. The turn reduced the distance between air carrier X and air carrier Y. Controller asked if air carrier X could be level in 2 mins, then after obtaining an affirmation, advised air carrier X to do so. When air carrier X began tracking toward yrk, the controller issued traffic then questioned air carrier X if he could be level in 30 seconds. Then the controller obtained air carrier X's altitude, FL385, and requested air carrier X to report reaching FL390. Aedp activated. Air carrier X then stated it would take 10-15 seconds to level and he would take a turn. No turn was issued since the aircraft were now diverging.
Original NASA ASRS Text
Title: RPTED OPERROR BTWN AN ACR EA32 AND A CARGO LR25 WHEN THE CLBING LEAR JET FAILED TO REACH ASSIGNED ALT ABOVE THE EA32 BEFORE ALT SEPARATION WAS LOST.
Narrative: CTLR RECOGNIZED ACR Y AND ACR X AS TFC, BUT ANTICIPATED THE LEAR TO REACH FL390 IN AMPLE TIME. 2 OTHER LEAR JETS WERE FOLLOWING ACR X TO SDF, SO CTLR TURNED ACR X DIRECT YRK TO INCREASE SPACING BTWN THEM. THE TURN REDUCED THE DISTANCE BTWN ACR X AND ACR Y. CTLR ASKED IF ACR X COULD BE LEVEL IN 2 MINS, THEN AFTER OBTAINING AN AFFIRMATION, ADVISED ACR X TO DO SO. WHEN ACR X BEGAN TRACKING TOWARD YRK, THE CTLR ISSUED TFC THEN QUESTIONED ACR X IF HE COULD BE LEVEL IN 30 SECONDS. THEN THE CTLR OBTAINED ACR X'S ALT, FL385, AND REQUESTED ACR X TO RPT REACHING FL390. AEDP ACTIVATED. ACR X THEN STATED IT WOULD TAKE 10-15 SECONDS TO LEVEL AND HE WOULD TAKE A TURN. NO TURN WAS ISSUED SINCE THE ACFT WERE NOW DIVERGING.
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.