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ZMP radar controller attempted to climb MD80 through altitude of a B757 at cruise and misjudged climb rate resulting in loss of separation.
| Attributes | |
| ACN | 559872 |
| Time | |
| Date | 200209 |
| Day | Fri |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | navaid : lnk.vortac |
| State Reference | NE |
| Altitude | msl single value : 36600 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zmp.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | government : faa |
| Function | controller : radar |
| Qualification | controller : radar |
| Experience | controller radar : 17 |
| ASRS Report | 559872 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation |
| Independent Detector | atc equipment : conflict alert atc equipment other atc equipment : radar other controllera other flight crewa other flight crewb |
| Resolutory Action | controller : issued new clearance other |
| Consequence | faa : investigated |
| Miss Distance | horizontal : 28200 vertical : 300 |
| Supplementary | |
| Problem Areas | ATC Human Performance Aircraft Flight Crew Human Performance |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Climbed aircraft X to FL370 told to expedite. Asked rate of climb, 2000 FPM. Called traffic, turned aircraft X 35 degrees right. Asked altitude, FL366. Targets merged at 4.5 mi lateral and 1700 ft vertical. I don't believe that aircraft X kept the 2000 ft climb rate and I don't believe that he took the 35 degree turn.
Original NASA ASRS Text
Title: ZMP RADAR CTLR ATTEMPTED TO CLB MD80 THROUGH ALT OF A B757 AT CRUISE AND MISJUDGED CLB RATE RESULTING IN LOSS OF SEPARATION.
Narrative: CLBED ACFT X TO FL370 TOLD TO EXPEDITE. ASKED RATE OF CLB, 2000 FPM. CALLED TFC, TURNED ACFT X 35 DEGS R. ASKED ALT, FL366. TARGETS MERGED AT 4.5 MI LATERAL AND 1700 FT VERT. I DON'T BELIEVE THAT ACFT X KEPT THE 2000 FT CLB RATE AND I DON'T BELIEVE THAT HE TOOK THE 35 DEG TURN.
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.