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Near midair collision or actual collision avoided and downgraded to a potential conflict less than standard separation in operational error with opposite direction climbing traffic. Night operation.
| Attributes | |
| ACN | 262540 |
| Time | |
| Date | 199401 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | atc facility : flm |
| State Reference | KY |
| Altitude | msl bound lower : 30000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid |
| Operator | common carrier : air carrier |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| 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 : 180 flight time total : 15000 flight time type : 600 |
| ASRS Report | 262540 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 7700 flight time type : 1500 |
| ASRS Report | 262352 |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : published procedure non adherence : required legal separation other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 900 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error other |
Narrative:
We were cleared to climb from FL290 to FL330. This was a controller error because we had opposite direction dc-9 traffic at FL310. Out of FL300 we got a TCASII RA to descend and the other aircraft got a TCASII RA to climb. We were both in the clouds and never would have seen each other. I am convinced that TCASII prevented a midair collision in this event. Supplemental information from acn 262352: another aircraft (dc-9) followed their TCASII RA and climbed. The last altitude I saw of their aircraft was plus 900 ft on TCASII. (900 ft from our aircraft.)
Original NASA ASRS Text
Title: NMAC OR ACTUAL COLLISION AVOIDED AND DOWNGRADED TO A POTENTIAL CONFLICT LTSS IN OPERROR WITH OPPOSITE DIRECTION CLBING TFC. NIGHT OP.
Narrative: WE WERE CLRED TO CLB FROM FL290 TO FL330. THIS WAS A CTLR ERROR BECAUSE WE HAD OPPOSITE DIRECTION DC-9 TFC AT FL310. OUT OF FL300 WE GOT A TCASII RA TO DSND AND THE OTHER ACFT GOT A TCASII RA TO CLB. WE WERE BOTH IN THE CLOUDS AND NEVER WOULD HAVE SEEN EACH OTHER. I AM CONVINCED THAT TCASII PREVENTED A MIDAIR COLLISION IN THIS EVENT. SUPPLEMENTAL INFO FROM ACN 262352: ANOTHER ACFT (DC-9) FOLLOWED THEIR TCASII RA AND CLBED. THE LAST ALT I SAW OF THEIR ACFT WAS PLUS 900 FT ON TCASII. (900 FT FROM OUR 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.