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Reporter deviation from assigned altitude 800 ft in response to TCASII climb RA and the low wing single engine aircraft was observed to pass underneath.
| Attributes | |
| ACN | 277786 |
| Time | |
| Date | 199407 |
| Day | Sun |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : rst |
| State Reference | MN |
| Altitude | msl bound lower : 11000 msl bound upper : 11800 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zmp |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : flight engineer pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 10000 flight time type : 1500 |
| ASRS Report | 277786 |
| 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 |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action flight crew : returned to intended course or assigned course |
| Consequence | Other |
| Miss Distance | vertical : 800 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | other |
Narrative:
Cruising at 11000 ft, TCASII RA climb. Left cruise altitude 11000 ft and climbed to 11800 ft MSL. TCASII showed traffic 12 O'clock and showed an RA of climb. Traffic passed below us and to our left, aircraft low wing single engine aircraft. Advised center of altitude deviation of 800 ft. Once conflict over returned to cruise altitude of 11000 ft.
Original NASA ASRS Text
Title: RPTR DEV FROM ASSIGNED ALT 800 FT IN RESPONSE TO TCASII CLB RA AND THE LOW WING SINGLE ENG ACFT WAS OBSERVED TO PASS UNDERNEATH.
Narrative: CRUISING AT 11000 FT, TCASII RA CLB. LEFT CRUISE ALT 11000 FT AND CLBED TO 11800 FT MSL. TCASII SHOWED TFC 12 O'CLOCK AND SHOWED AN RA OF CLB. TFC PASSED BELOW US AND TO OUR L, ACFT LOW WING SINGLE ENG ACFT. ADVISED CTR OF ALTDEV OF 800 FT. ONCE CONFLICT OVER RETURNED TO CRUISE ALT OF 11000 FT.
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.