 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Air carrier pilot following TCASII instructions has less than standard separation with descending traffic above.
| Attributes | |
| ACN | 241878 |
| Time | |
| Date | 199305 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : jfk |
| State Reference | NY |
| Altitude | msl bound lower : 31000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport |
| Navigation In Use | Other |
| Flight Phase | descent other |
| 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 | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller non radar : 9 controller radar : 8 controller supervisory : 1 |
| ASRS Report | 241878 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : required legal separation non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Miss Distance | horizontal : 6000 vertical : 1000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Air carrier X, an large transport, descending rapidly to FL330, air carrier Y, a widebody transport, level FL310. TCASII resolution received by air carrier Y first to descend then to climb resulting in air carrier Y reaching FL320 while air carrier X leveled off atl FL330. Result was less than standard separation between both aircraft.
Original NASA ASRS Text
Title: ACR PLT FOLLOWING TCASII INSTRUCTIONS HAS LTSS WITH DSNDING TFC ABOVE.
Narrative: ACR X, AN LGT, DSNDING RAPIDLY TO FL330, ACR Y, A WDB, LEVEL FL310. TCASII RESOLUTION RECEIVED BY ACR Y FIRST TO DSND THEN TO CLB RESULTING IN ACR Y REACHING FL320 WHILE ACR X LEVELED OFF ATL FL330. RESULT WAS LTSS BTWN BOTH ACFT.
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.