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Air carrier X had less than standard separation from air carrier Y. System error. Air carrier Y flight crew failed to comply with ATC instructions. Pilot deviation.
| Attributes | |
| ACN | 149619 |
| Time | |
| Date | 199006 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : srp |
| State Reference | AZ |
| Altitude | msl bound lower : 19000 msl bound upper : 19200 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zab |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| ASRS Report | 149619 |
| Person 2 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Events | |
| Anomaly | conflict : airborne less severe inflight encounter : weather non adherence : published procedure non adherence : required legal separation non adherence : far non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 28800 vertical : 200 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure Operational Error Pilot Deviation |
Narrative:
Thunderstorms in the phx area were causing deviations out the payso 5 departure. WX over fossl on the fossl 1 STAR caused arrs to be higher than normal arriving to phx. Air carrier X medium large transport arriving phx was held high for WX and was being vectored west of the arrival for descent, descending to 12000'. Air carrier Y ldg, a phx departure out the payso 5 SID, was deviating north for WX. Sector 45 (sfc up to FL230) was working air carrier X handoff just coming from sector 39 (FL240 and up). Sector 38 (sfc upt to FL230) was working air carrier Y. Air carrier Y was given 2 turns which he wouldn't take for WX. Neither sector 38 nor 45 was aware of what the other's aircraft was actually doing. Sector 38 asked sector 45 to stop air carrier X at FL200 in the descent as air carrier Y had been stopped at FL190. The request came to late as air carrier X reported already through FL200. Air carrier X stopped the descent at FL192 and climbed back to FL200. Sep was lost with approximately 4.8 mi and 200'. Sector 38, a new departure sector, does not work well with any WX deviations.
Original NASA ASRS Text
Title: ACR X HAD LESS THAN STANDARD SEPARATION FROM ACR Y. SYSTEM ERROR. ACR Y FLT CREW FAILED TO COMPLY WITH ATC INSTRUCTIONS. PLT DEVIATION.
Narrative: TSTMS IN THE PHX AREA WERE CAUSING DEVIATIONS OUT THE PAYSO 5 DEP. WX OVER FOSSL ON THE FOSSL 1 STAR CAUSED ARRS TO BE HIGHER THAN NORMAL ARRIVING TO PHX. ACR X MLG ARRIVING PHX WAS HELD HIGH FOR WX AND WAS BEING VECTORED W OF THE ARR FOR DSNT, DSNDING TO 12000'. ACR Y LDG, A PHX DEP OUT THE PAYSO 5 SID, WAS DEVIATING N FOR WX. SECTOR 45 (SFC UP TO FL230) WAS WORKING ACR X HDOF JUST COMING FROM SECTOR 39 (FL240 AND UP). SECTOR 38 (SFC UPT TO FL230) WAS WORKING ACR Y. ACR Y WAS GIVEN 2 TURNS WHICH HE WOULDN'T TAKE FOR WX. NEITHER SECTOR 38 NOR 45 WAS AWARE OF WHAT THE OTHER'S ACFT WAS ACTUALLY DOING. SECTOR 38 ASKED SECTOR 45 TO STOP ACR X AT FL200 IN THE DSNT AS ACR Y HAD BEEN STOPPED AT FL190. THE REQUEST CAME TO LATE AS ACR X RPTED ALREADY THROUGH FL200. ACR X STOPPED THE DSNT AT FL192 AND CLBED BACK TO FL200. SEP WAS LOST WITH APPROX 4.8 MI AND 200'. SECTOR 38, A NEW DEP SECTOR, DOES NOT WORK WELL WITH ANY WX DEVIATIONS.
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.