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DC9 flight crew on final approach to rst airport were required to take evasive action when a twin cessna did not follow ATC instructions and turned in ahead of the DC9.
| Attributes | |
| ACN | 409720 |
| Time | |
| Date | 199807 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : rst |
| State Reference | MN |
| Altitude | agl bound lower : 800 agl bound upper : 800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tower : rst |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 10 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : approach |
| Route In Use | approach : visual arrival other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Cessna Aircraft Undifferentiated or Other Model |
| Operating Under FAR Part | Part 91 |
| Flight Phase | other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 170 flight time total : 11100 flight time type : 5500 |
| ASRS Report | 409720 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | non adherence : clearance non adherence : far other spatial deviation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 500 vertical : 100 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On final approach to runway 31 at rst, cleared to land by tower and fully configured (gear down, flaps 5 degrees). A twin engine cessna was also in the traffic pattern and instructed to turn left base behind DC9. Instead it turned a short base inside of DC9 putting it on a collision course with the DC9 from an 11 O'clock high position on the DC9. Tower instructed cessna to break off approach, but it was slow to comply. DC9 captain took evasive action to pass behind and below cessna. Cessna was in sight of DC9 captain throughout cessna's abrupt base turn and the subsequent go around. DC9 TCASII generated RA, but too late to be of any use. In fact, RA was for a climb maneuver beyond the capability of the aircraft and would have compounded the problem if followed.
Original NASA ASRS Text
Title: DC9 FLC ON FINAL APCH TO RST ARPT WERE REQUIRED TO TAKE EVASIVE ACTION WHEN A TWIN CESSNA DID NOT FOLLOW ATC INSTRUCTIONS AND TURNED IN AHEAD OF THE DC9.
Narrative: ON FINAL APCH TO RWY 31 AT RST, CLRED TO LAND BY TWR AND FULLY CONFIGURED (GEAR DOWN, FLAPS 5 DEGS). A TWIN ENG CESSNA WAS ALSO IN THE TFC PATTERN AND INSTRUCTED TO TURN L BASE BEHIND DC9. INSTEAD IT TURNED A SHORT BASE INSIDE OF DC9 PUTTING IT ON A COLLISION COURSE WITH THE DC9 FROM AN 11 O'CLOCK HIGH POS ON THE DC9. TWR INSTRUCTED CESSNA TO BREAK OFF APCH, BUT IT WAS SLOW TO COMPLY. DC9 CAPT TOOK EVASIVE ACTION TO PASS BEHIND AND BELOW CESSNA. CESSNA WAS IN SIGHT OF DC9 CAPT THROUGHOUT CESSNA'S ABRUPT BASE TURN AND THE SUBSEQUENT GAR. DC9 TCASII GENERATED RA, BUT TOO LATE TO BE OF ANY USE. IN FACT, RA WAS FOR A CLB MANEUVER BEYOND THE CAPABILITY OF THE ACFT AND WOULD HAVE COMPOUNDED THE PROB IF FOLLOWED.
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.