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Intruder aircraft overshoots altitude causing an incursion of a DC9 assigned intermediate departure altitude.
| Attributes | |
| ACN | 495712 |
| Time | |
| Date | 200012 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : ord.airport |
| State Reference | IL |
| Altitude | msl single value : 5000 |
| Environment | |
| Flight Conditions | IMC |
| Weather Elements | Snow |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : c90.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 40 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure : on vectors |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | tracon : c90.tracon |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 165 flight time total : 4500 flight time type : 4500 |
| ASRS Report | 495712 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : multi engine pilot : instrument pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : clearance |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : separated traffic |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 12000 vertical : 1000 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were level at 5000 ft heading 180 degrees (I think). ATC called traffic at 12 - 1 O'clock position. First officer was PF. He called traffic in sight. ATC told us to turn to 070 degrees and descend to 4000 ft immediately. We did so. Controller said the other aircraft had busted our altitude. Not sure how close we got -- maybe 2-3 mi. Controller did a good job. Might have been a problem if controller didn't catch altitude deviation of other aircraft as we are not mandated to have TCASII yet.
Original NASA ASRS Text
Title: INTRUDER ACFT OVERSHOOTS ALT CAUSING AN INCURSION OF A DC9 ASSIGNED INTERMEDIATE DEP ALT.
Narrative: WE WERE LEVEL AT 5000 FT HDG 180 DEGS (I THINK). ATC CALLED TFC AT 12 - 1 O'CLOCK POS. FO WAS PF. HE CALLED TFC IN SIGHT. ATC TOLD US TO TURN TO 070 DEGS AND DSND TO 4000 FT IMMEDIATELY. WE DID SO. CTLR SAID THE OTHER ACFT HAD BUSTED OUR ALT. NOT SURE HOW CLOSE WE GOT -- MAYBE 2-3 MI. CTLR DID A GOOD JOB. MIGHT HAVE BEEN A PROB IF CTLR DIDN'T CATCH ALTDEV OF OTHER ACFT AS WE ARE NOT MANDATED TO HAVE TCASII YET.
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.