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While in a climb, air carrier was issued an immediate descent, then observed an aircraft pass overhead within 500'.
| Attributes | |
| ACN | 113103 |
| Time | |
| Date | 198906 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : den |
| State Reference | CO |
| Altitude | msl bound lower : 29500 msl bound upper : 30000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zdv |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| 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 : 200 flight time total : 17000 flight time type : 1040 |
| ASRS Report | 113103 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Events | |
| Anomaly | conflict : airborne less severe non adherence : required legal separation non adherence : published procedure |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance |
| Consequence | Other |
| Miss Distance | horizontal : 0 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Operational Error |
Narrative:
On departure from denver we received 4 different altitudes and all 4 were changed. Finally we were cleared to FL310 and were given 2 routing changes between slc and eek. Climbing through FL295 den center said 'descend immediately to FL280'. We saw an aircraft go over us within 500'. The controller said he tried to give us FL280 but his radio 'stuck'. Earlier we were cleared to FL200 and passing 12,500 he called maintain 12,000. The controling of both altitudes and routing was very confused and disorganized and should be looked at.
Original NASA ASRS Text
Title: WHILE IN A CLIMB, ACR WAS ISSUED AN IMMEDIATE DESCENT, THEN OBSERVED AN ACFT PASS OVERHEAD WITHIN 500'.
Narrative: ON DEP FROM DENVER WE RECEIVED 4 DIFFERENT ALTS AND ALL 4 WERE CHANGED. FINALLY WE WERE CLRED TO FL310 AND WERE GIVEN 2 ROUTING CHANGES BETWEEN SLC AND EEK. CLIMBING THROUGH FL295 DEN CENTER SAID 'DESCEND IMMEDIATELY TO FL280'. WE SAW AN ACFT GO OVER US WITHIN 500'. THE CTLR SAID HE TRIED TO GIVE US FL280 BUT HIS RADIO 'STUCK'. EARLIER WE WERE CLRED TO FL200 AND PASSING 12,500 HE CALLED MAINTAIN 12,000. THE CTLING OF BOTH ALTS AND ROUTING WAS VERY CONFUSED AND DISORGANIZED AND SHOULD BE LOOKED AT.
Data retrieved from NASA's ASRS site as of August 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.