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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Cpr X descent through occupied altitude had less than standard separation from air carrier Y. System error.
| Attributes | |
| ACN | 219093 |
| Time | |
| Date | 199208 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ekn |
| State Reference | WV |
| Altitude | msl bound lower : 22000 msl bound upper : 22000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdc |
| Operator | general aviation : corporate |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 20 |
| ASRS Report | 219093 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment other atc equipment : unspecified other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 16200 vertical : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error Inter Facility Coordination Failure |
Narrative:
I was working light transport at FL220 when R37 called with a point- out on cpr X requesting a descent to FL190. I approved point-out reference light transport. At this time, I did not have a handoff on air carrier Y. When I got air carrier Y, I was concerned about air carrier Y overtaking light transport. The data block on cpr X showed descending to FL230. R37 put descending to 190 in data block just as the 2 aircraft passed and cpr X started down with 2.7 mi and 700 ft.
Original NASA ASRS Text
Title: CPR X DSCNT THROUGH OCCUPIED ALT HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: I WAS WORKING LTT AT FL220 WHEN R37 CALLED WITH A POINT- OUT ON CPR X REQUESTING A DSCNT TO FL190. I APPROVED POINT-OUT REF LTT. AT THIS TIME, I DID NOT HAVE A HDOF ON ACR Y. WHEN I GOT ACR Y, I WAS CONCERNED ABOUT ACR Y OVERTAKING LTT. THE DATA BLOCK ON CPR X SHOWED DSNDING TO FL230. R37 PUT DSNDING TO 190 IN DATA BLOCK JUST AS THE 2 ACFT PASSED AND CPR X STARTED DOWN WITH 2.7 MI AND 700 FT.
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.