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TCASII RA at FL350. Aircraft climbs 500 ft following the RA commands but target aircraft never gets closer than 2000 ft.
| Attributes | |
| ACN | 299165 |
| Time | |
| Date | 199503 |
| Day | Thu |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : mkc |
| State Reference | MO |
| Altitude | msl bound lower : 35000 msl bound upper : 35500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zkc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | other : unknown |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 23000 flight time type : 400 |
| ASRS Report | 299165 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other |
| 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 : 0 vertical : 2000 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
While wbound on J80 on the mkc 264 degree radial at about 130 NM in cruise at FL350, mach .85 at approximately XA27 GMT we received a climb RA from the TCASII. We had a proximity target on the TCASII scope eastbound at FL330. Suddenly we received a 'traffic, traffic' TA followed immediately by an RA target at our position, a 'climb, climb, climb' command and a 1500-2000 FPM vertical speed climb (red lighted arc to 1500 FPM and green lighted arc to 2000 FPM) presentation. I advanced the throttles and the copilot initiated a climb of about 1800 FPM. We experienced a buffet and a 'monitor vertical speed, monitor vertical speed' command. When we received a 'clear of conflict' command the copilot leveled the aircraft at FL355. ATC was advised of the conflict and RA maneuver. The controller confirmed the flight level of the other aircraft as FL330 and instructed us to return to FL350. Due to the proximity of the displayed threat our maneuver was more rapid than a normal climb pitch attitude change. Our first flight attendant reported that the flight attendants had been thrown about and were writing reports of their experiences. No injuries were reported to me.
Original NASA ASRS Text
Title: TCASII RA AT FL350. ACFT CLBS 500 FT FOLLOWING THE RA COMMANDS BUT TARGET ACFT NEVER GETS CLOSER THAN 2000 FT.
Narrative: WHILE WBOUND ON J80 ON THE MKC 264 DEG RADIAL AT ABOUT 130 NM IN CRUISE AT FL350, MACH .85 AT APPROX XA27 GMT WE RECEIVED A CLB RA FROM THE TCASII. WE HAD A PROX TARGET ON THE TCASII SCOPE EBOUND AT FL330. SUDDENLY WE RECEIVED A 'TFC, TFC' TA FOLLOWED IMMEDIATELY BY AN RA TARGET AT OUR POS, A 'CLB, CLB, CLB' COMMAND AND A 1500-2000 FPM VERT SPD CLB (RED LIGHTED ARC TO 1500 FPM AND GREEN LIGHTED ARC TO 2000 FPM) PRESENTATION. I ADVANCED THE THROTTLES AND THE COPLT INITIATED A CLB OF ABOUT 1800 FPM. WE EXPERIENCED A BUFFET AND A 'MONITOR VERT SPD, MONITOR VERT SPD' COMMAND. WHEN WE RECEIVED A 'CLR OF CONFLICT' COMMAND THE COPLT LEVELED THE ACFT AT FL355. ATC WAS ADVISED OF THE CONFLICT AND RA MANEUVER. THE CTLR CONFIRMED THE FLT LEVEL OF THE OTHER ACFT AS FL330 AND INSTRUCTED US TO RETURN TO FL350. DUE TO THE PROX OF THE DISPLAYED THREAT OUR MANEUVER WAS MORE RAPID THAN A NORMAL CLB PITCH ATTITUDE CHANGE. OUR FIRST FLT ATTENDANT RPTED THAT THE FLT ATTENDANTS HAD BEEN THROWN ABOUT AND WERE WRITING RPTS OF THEIR EXPERIENCES. NO INJURIES WERE RPTED TO ME.
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.