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An air carrier large transport received a TCASII command to climb. It climbed 300 ft, then descended to it's assigned altitude. The rptrs did not state whether ATC had called out the traffic. The other aircraft was seen visually.
| Attributes | |
| ACN | 207653 |
| Time | |
| Date | 199204 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : scy |
| State Reference | TX |
| Altitude | msl bound lower : 11000 msl bound upper : 11300 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | descent other |
| Route In Use | arrival star : star enroute airway : dfw |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 50 flight time total : 16710 flight time type : 5180 |
| ASRS Report | 207653 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 100 flight time total : 4060 flight time type : 30 |
| ASRS Report | 208478 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 500 vertical : 6000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During arrival to dfw on the scurry 2 arrival after reaching a descent altitude of 11000 ft approximately 33 NM northwest of scurry VOR on the 296 radial, our onboard TCASII system gave us a RA warning and a command to climb. I complied with the TCASII command and climbed to 11300 ft at which time the approaching climbing traffic was spotted. Immediately after level off at 11300 ft the TCASII commanded a descent and I descended to 11000 ft and all warnings ceased. Although the traffic apparently was in the warning envelope of the TCASII system, a reasonable clearance was always maintained and visual contact with the traffic caused no alarm.
Original NASA ASRS Text
Title: AN ACR LGT RECEIVED A TCASII COMMAND TO CLB. IT CLBED 300 FT, THEN DSNDED TO IT'S ASSIGNED ALT. THE RPTRS DID NOT STATE WHETHER ATC HAD CALLED OUT THE TFC. THE OTHER ACFT WAS SEEN VISUALLY.
Narrative: DURING ARR TO DFW ON THE SCURRY 2 ARR AFTER REACHING A DSCNT ALT OF 11000 FT APPROX 33 NM NW OF SCURRY VOR ON THE 296 RADIAL, OUR ONBOARD TCASII SYS GAVE US A RA WARNING AND A COMMAND TO CLB. I COMPLIED WITH THE TCASII COMMAND AND CLBED TO 11300 FT AT WHICH TIME THE APCHING CLBING TFC WAS SPOTTED. IMMEDIATELY AFTER LEVEL OFF AT 11300 FT THE TCASII COMMANDED A DSCNT AND I DSNDED TO 11000 FT AND ALL WARNINGS CEASED. ALTHOUGH THE TFC APPARENTLY WAS IN THE WARNING ENVELOPE OF THE TCASII SYS, A REASONABLE CLRNC WAS ALWAYS MAINTAINED AND VISUAL CONTACT WITH THE TFC CAUSED NO ALARM.
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.