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Flight crew of a super MD80 climbed above assigned altitude in response to a TCASII RA. The other aircraft was observed by the flight crew leveling off at assigned altitude, 1000 ft below when the 2 aircraft passed.
| Attributes | |
| ACN | 372040 |
| Time | |
| Date | 199706 |
| Day | Mon |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : gdm |
| State Reference | MA |
| Altitude | msl bound lower : 24000 msl bound upper : 25400 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zbw |
| Operator | common carrier : air carrier |
| Make Model Name | MD-80 Super 80 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude cruise other descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | other : unknown |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 372040 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe non adherence : clearance other anomaly other |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | vertical : 1400 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
ATC facility: ZBW. Location: 60 NM west gdm VOR on 286 degree radial flying direct to gdm at FL250. We observed traffic on TCASII slightly to the right and ahead climbing rapidly 1600 ft below just within 10 NM. He quickly went from a TA on the TCASII to a climb RA. As we began our climb we acquired the traffic visually and ATC notified us of the traffic. We notified ATC that we were responding to a TCASII RA which he rogered. The traffic leveled off at his assigned altitude of FL240 as he passed us. We got a clear of conflict notice from TCASII and began our descent back to our assigned altitude of FL250. We were at FL254 when we began our descent back to FL250. ZBW made no further comment, therefore I believe that no traffic conflict existed.
Original NASA ASRS Text
Title: FLC OF A SUPER MD80 CLBED ABOVE ASSIGNED ALT IN RESPONSE TO A TCASII RA. THE OTHER ACFT WAS OBSERVED BY THE FLC LEVELING OFF AT ASSIGNED ALT, 1000 FT BELOW WHEN THE 2 ACFT PASSED.
Narrative: ATC FACILITY: ZBW. LOCATION: 60 NM W GDM VOR ON 286 DEG RADIAL FLYING DIRECT TO GDM AT FL250. WE OBSERVED TFC ON TCASII SLIGHTLY TO THE R AND AHEAD CLBING RAPIDLY 1600 FT BELOW JUST WITHIN 10 NM. HE QUICKLY WENT FROM A TA ON THE TCASII TO A CLB RA. AS WE BEGAN OUR CLB WE ACQUIRED THE TFC VISUALLY AND ATC NOTIFIED US OF THE TFC. WE NOTIFIED ATC THAT WE WERE RESPONDING TO A TCASII RA WHICH HE ROGERED. THE TFC LEVELED OFF AT HIS ASSIGNED ALT OF FL240 AS HE PASSED US. WE GOT A CLR OF CONFLICT NOTICE FROM TCASII AND BEGAN OUR DSCNT BACK TO OUR ASSIGNED ALT OF FL250. WE WERE AT FL254 WHEN WE BEGAN OUR DSCNT BACK TO FL250. ZBW MADE NO FURTHER COMMENT, THEREFORE I BELIEVE THAT NO TFC CONFLICT EXISTED.
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.