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Air carrier Y climb through occupied altitude had less than standard separation from air carrier Y. System error.
| Attributes | |
| ACN | 215734 |
| Time | |
| Date | 199207 |
| Day | Mon |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : oak |
| State Reference | CA |
| Altitude | msl bound lower : 33000 msl bound upper : 35000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zoa |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | cruise 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 | climbout : intermediate altitude descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : developmental controller : radar |
| Experience | controller radar : 1 |
| ASRS Report | 215734 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 28200 vertical : 1600 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Air carrier X was en route to pdx at FL350. Air carrier Y was en route to san at FL330. Air carrier Y was climbed to FL370. When proximity was noticed (15 seconds later), air carrier Y was turned left and told to maintain FL330. 2 1/2 min later, air carrier Y reported level at FL330 and never turned. Air carrier Y had reported 'traffic in sight' at the time of the reclrnc and this may have been a big factor in his lackluster performance to comply with control instructions. The actions to ensure separation were not timely enough as an ntap showed 1 DOT 1600 ft vertical and 4.65 NM lateral.
Original NASA ASRS Text
Title: ACR Y CLB THROUGH OCCUPIED ALT HAD LTSS FROM ACR Y. SYS ERROR.
Narrative: ACR X WAS ENRTE TO PDX AT FL350. ACR Y WAS ENRTE TO SAN AT FL330. ACR Y WAS CLBED TO FL370. WHEN PROX WAS NOTICED (15 SECONDS LATER), ACR Y WAS TURNED L AND TOLD TO MAINTAIN FL330. 2 1/2 MIN LATER, ACR Y RPTED LEVEL AT FL330 AND NEVER TURNED. ACR Y HAD RPTED 'TFC IN SIGHT' AT THE TIME OF THE RECLRNC AND THIS MAY HAVE BEEN A BIG FACTOR IN HIS LACKLUSTER PERFORMANCE TO COMPLY WITH CTL INSTRUCTIONS. THE ACTIONS TO ENSURE SEPARATION WERE NOT TIMELY ENOUGH AS AN NTAP SHOWED 1 DOT 1600 FT VERT AND 4.65 NM LATERAL.
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.