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An air carrier large transport responded to a TCASII command and an ARTCC command to avoid less than standard separation with another aircraft.
| Attributes | |
| ACN | 337991 |
| Time | |
| Date | 199606 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : bld |
| State Reference | NV |
| Altitude | msl bound lower : 29000 msl bound upper : 32000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zlc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | other : unknown |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 170 flight time total : 23000 flight time type : 3000 |
| ASRS Report | 337991 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 190 flight time total : 23000 flight time type : 1000 |
| ASRS Report | 337780 |
| Events | |
| Anomaly | conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera other flight crewa |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | Other |
| Miss Distance | horizontal : 18000 vertical : 1400 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Acknowledged clearance from FL290 to FL330. Approaching FL320, ATC advised of 1 O'clock traffic at FL330 and gave us a right turn and descent to FL310. We had the traffic visually and on TCASII. Supplemental information from acn 337780: we heard and responded to clearance from FL290 to FL330. We had 'no' response to our reply of FL330. About 5 mi from aircraft at our 1 O'clock position and climbing through FL320 ft, ATC asked our altitude and gave us a turn to the right. I saw the aircraft. TCASII went off. We were in a descent to FL310, passing through FL317 ft.
Original NASA ASRS Text
Title: AN ACR LGT RESPONDED TO A TCASII COMMAND AND AN ARTCC COMMAND TO AVOID LTSS WITH ANOTHER ACFT.
Narrative: ACKNOWLEDGED CLRNC FROM FL290 TO FL330. APCHING FL320, ATC ADVISED OF 1 O'CLOCK TFC AT FL330 AND GAVE US A R TURN AND DSCNT TO FL310. WE HAD THE TFC VISUALLY AND ON TCASII. SUPPLEMENTAL INFO FROM ACN 337780: WE HEARD AND RESPONDED TO CLRNC FROM FL290 TO FL330. WE HAD 'NO' RESPONSE TO OUR REPLY OF FL330. ABOUT 5 MI FROM ACFT AT OUR 1 O'CLOCK POS AND CLBING THROUGH FL320 FT, ATC ASKED OUR ALT AND GAVE US A TURN TO THE R. I SAW THE ACFT. TCASII WENT OFF. WE WERE IN A DSCNT TO FL310, PASSING THROUGH FL317 FT.
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.