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Near midair collision at high altitude by 1 aircraft in cruise and the other climbing through the other's altitude due to an ATC operational error.
| Attributes | |
| ACN | 275008 |
| Time | |
| Date | 199406 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : brd |
| State Reference | FO |
| Altitude | msl bound lower : 33000 msl bound upper : 34000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute airway : ua33 |
| 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 : instrument pilot : flight engineer pilot : atp pilot : commercial |
| Experience | flight time last 90 days : 180 flight time total : 11000 flight time type : 5000 |
| ASRS Report | 275008 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | conflict : nmac non adherence : clearance non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 300 vertical : 300 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
Cruising eastbound FL330 on UA33 approaching brd. Target suddenly appeared on TCASII at 10 NM, 1000 ft below and climbing, slightly to right, opposite direction. TA followed immediately by RA commanding climb. Initiated left climbing turn but target continued to climb with us until target appeared to merge. TCASII finally announced clear of traffic at just over 34000 ft. Returned to altitude (FL330) and continued on course UA14 south of brd. Subsequent conversation revealed target to be cleared to climb to FL390. Both aircraft under positive radar control with brindise radar. We did not see the aircraft, but they saw us and estimated the miss at 200- 300 ft. Brindise controller admitted mistake and both aircraft advised would be filing near miss report.
Original NASA ASRS Text
Title: NMAC AT HIGH ALT BY 1 ACFT IN CRUISE AND THE OTHER CLBING THROUGH THE OTHER'S ALT DUE TO AN ATC OPERROR.
Narrative: CRUISING EBOUND FL330 ON UA33 APCHING BRD. TARGET SUDDENLY APPEARED ON TCASII AT 10 NM, 1000 FT BELOW AND CLBING, SLIGHTLY TO R, OPPOSITE DIRECTION. TA FOLLOWED IMMEDIATELY BY RA COMMANDING CLB. INITIATED L CLBING TURN BUT TARGET CONTINUED TO CLB WITH US UNTIL TARGET APPEARED TO MERGE. TCASII FINALLY ANNOUNCED CLR OF TFC AT JUST OVER 34000 FT. RETURNED TO ALT (FL330) AND CONTINUED ON COURSE UA14 S OF BRD. SUBSEQUENT CONVERSATION REVEALED TARGET TO BE CLRED TO CLB TO FL390. BOTH ACFT UNDER POSITIVE RADAR CTL WITH BRINDISE RADAR. WE DID NOT SEE THE ACFT, BUT THEY SAW US AND ESTIMATED THE MISS AT 200- 300 FT. BRINDISE CTLR ADMITTED MISTAKE AND BOTH ACFT ADVISED WOULD BE FILING NEAR MISS RPT.
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.