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An air carrier medium large transport had to take evasive action leveloff to avoid descending into another aircraft's airspace.
| Attributes | |
| ACN | 339191 |
| Time | |
| Date | 199606 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : djb |
| State Reference | OH |
| Altitude | msl bound lower : 31000 msl bound upper : 33000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zob tower : grr |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| 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 : 210 flight time total : 17000 flight time type : 13000 |
| ASRS Report | 339191 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 210 flight time total : 5900 flight time type : 1500 |
| ASRS Report | 339194 |
| Events | |
| Anomaly | altitude deviation : undershoot conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 1100 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
While descending from FL330 to FL310, we received a TA on our TCASII. We visually located the aircraft (FL310) and leveled off at FL321. At that time ATC called and asked us our altitude. We replied that we had the traffic at 12 O'clock and had clearance to descend from FL330 to FL310. He said, 'roger.' once clear of traffic, we continued our descent to FL310 as he passed under us.
Original NASA ASRS Text
Title: AN ACR MLG HAD TO TAKE EVASIVE ACTION LEVELOFF TO AVOID DSNDING INTO ANOTHER ACFT'S AIRSPACE.
Narrative: WHILE DSNDING FROM FL330 TO FL310, WE RECEIVED A TA ON OUR TCASII. WE VISUALLY LOCATED THE ACFT (FL310) AND LEVELED OFF AT FL321. AT THAT TIME ATC CALLED AND ASKED US OUR ALT. WE REPLIED THAT WE HAD THE TFC AT 12 O'CLOCK AND HAD CLRNC TO DSND FROM FL330 TO FL310. HE SAID, 'ROGER.' ONCE CLR OF TFC, WE CONTINUED OUR DSCNT TO FL310 AS HE PASSED UNDER US.
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.