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ARTCC called traffic. TCAS noted traffic at 28200' and gave RA. Flight crew climbed 29200' then returned to FL290. ARTCC was advised of deviation.
| Attributes | |
| ACN | 172023 |
| Time | |
| Date | 199103 |
| Day | Sat |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : sby |
| State Reference | MD |
| Altitude | msl bound lower : 29000 msl bound upper : 29200 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude cruise other descent other |
| Route In Use | enroute airway : j79 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 30 flight time total : 2500 flight time type : 30 |
| ASRS Report | 172023 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : commercial pilot : atp |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | Other |
| Miss Distance | vertical : 1000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
During cruise flight, the TCAS system idented an aircraft ahead of us with an indicated altitude of FL28.2. ATC called traffic which we could not see due to IFR conditions. TCAS then gave us a resolution advisory at which time the first officer notified ATC and then climbed approximately 200'. Immediately after passing the traffic, the first officer returned to FL290. I never saw the other aircraft.
Original NASA ASRS Text
Title: ARTCC CALLED TRAFFIC. TCAS NOTED TRAFFIC AT 28200' AND GAVE RA. FLC CLIMBED 29200' THEN RETURNED TO FL290. ARTCC WAS ADVISED OF DEVIATION.
Narrative: DURING CRUISE FLT, THE TCAS SYS IDENTED AN ACFT AHEAD OF US WITH AN INDICATED ALT OF FL28.2. ATC CALLED TFC WHICH WE COULD NOT SEE DUE TO IFR CONDITIONS. TCAS THEN GAVE US A RESOLUTION ADVISORY AT WHICH TIME THE F/O NOTIFIED ATC AND THEN CLBED APPROX 200'. IMMEDIATELY AFTER PASSING THE TFC, THE F/O RETURNED TO FL290. I NEVER SAW THE OTHER ACFT.
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.