 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
Medium large transport cleared 5000', copied 8000', resulting in near midair collision with large transport on descent to 7000'.
| Attributes | |
| ACN | 106503 |
| Time | |
| Date | 198903 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 8000 msl bound upper : 8300 |
| Environment | |
| Flight Conditions | IMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Large Transport, Low Wing, 3 Turbojet Eng |
| Flight Phase | descent other |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : sid enroute : on vectors |
| 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 : 19700 flight time type : 10000 |
| ASRS Report | 106503 |
| Person 2 | |
| 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 : 190 flight time total : 12000 flight time type : 1923 |
| ASRS Report | 106507 |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : nmac non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | flight crew : took evasive action other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 0 vertical : 200 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Intra Facility Coordination Failure Pilot Deviation |
Narrative:
We were just on top of a cloud deck. We were on an assigned heading of 270 degrees at 8000', approach control cleared us to 7000' and immediately said, 'maintain 8000', I have an altitude bust.' all 3 crew members saw an medium large transport about 2 O'clock just above the clouds and he would cross our path. It looked like he would be very close so I started a climb. Approach control was advised we were climbing and he said, 'do what you have to do.' we climbed to 8300'. The last I saw of the medium large transport he was going back in the clouds and going to pass under us. On the ground we called approach control and he told us the medium large transport was cleared on ord 8 departure and did not level off at 5000'. Supplemental information from acn 106507: I questioned the copilot and she said she read back 8000' to the controller and I picked up the release where she had copied the clearance. It read 'af 8 XXXX' (transponder code). This convinced me she was right and I didn't ask her to verify it.
Original NASA ASRS Text
Title: MLG CLEARED 5000', COPIED 8000', RESULTING IN NMAC WITH LGT ON DESCENT TO 7000'.
Narrative: WE WERE JUST ON TOP OF A CLOUD DECK. WE WERE ON AN ASSIGNED HDG OF 270 DEGS AT 8000', APCH CTL CLRED US TO 7000' AND IMMEDIATELY SAID, 'MAINTAIN 8000', I HAVE AN ALT BUST.' ALL 3 CREW MEMBERS SAW AN MLG ABOUT 2 O'CLOCK JUST ABOVE THE CLOUDS AND HE WOULD CROSS OUR PATH. IT LOOKED LIKE HE WOULD BE VERY CLOSE SO I STARTED A CLB. APCH CTL WAS ADVISED WE WERE CLBING AND HE SAID, 'DO WHAT YOU HAVE TO DO.' WE CLBED TO 8300'. THE LAST I SAW OF THE MLG HE WAS GOING BACK IN THE CLOUDS AND GOING TO PASS UNDER US. ON THE GND WE CALLED APCH CTL AND HE TOLD US THE MLG WAS CLRED ON ORD 8 DEP AND DID NOT LEVEL OFF AT 5000'. SUPPLEMENTAL INFO FROM ACN 106507: I QUESTIONED THE COPLT AND SHE SAID SHE READ BACK 8000' TO THE CTLR AND I PICKED UP THE RELEASE WHERE SHE HAD COPIED THE CLRNC. IT READ 'AF 8 XXXX' (XPONDER CODE). THIS CONVINCED ME SHE WAS RIGHT AND I DIDN'T ASK HER TO VERIFY IT.
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.