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Altitude deviation altitude excursion. Air carrier was informed of a light plane that had them in sight. The air carrier crew did not see the light plane, but had to take evasive action based on TCASII RA.
| Attributes | |
| ACN | 311520 |
| Time | |
| Date | 199507 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : dnv airport : ord |
| State Reference | IL |
| Altitude | msl bound lower : 10000 msl bound upper : 10400 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker 100 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Operating Under FAR Part | Part 91 |
| Flight Phase | cruise other |
| Flight Plan | VFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| ASRS Report | 311520 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 311519 |
| Events | |
| Anomaly | altitude deviation : excursion from assigned altitude conflict : airborne less severe other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : returned to intended course or assigned course flight crew : took evasive action |
| Consequence | Other |
| Miss Distance | horizontal : 18000 vertical : 500 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation other |
Narrative:
We were climbing through 10000 ft direct to dnv, ATC told us VFR traffic 11 O'clock and 12 NM at 10500 ft. Traffic was not in sight but he claimed we were in sight. At 10200 ft and 5 NM, we received a TA. At 10400 ft and 3 NM we received an RA to descend. We informed ATC and they acknowledged. We descended 400 ft and TCASII told us we were clear of conflict. We told ATC we were clear and resumed our climb.
Original NASA ASRS Text
Title: ALTDEV ALT EXCURSION. ACR WAS INFORMED OF A LIGHT PLANE THAT HAD THEM IN SIGHT. THE ACR CREW DID NOT SEE THE LIGHT PLANE, BUT HAD TO TAKE EVASIVE ACTION BASED ON TCASII RA.
Narrative: WE WERE CLBING THROUGH 10000 FT DIRECT TO DNV, ATC TOLD US VFR TFC 11 O'CLOCK AND 12 NM AT 10500 FT. TFC WAS NOT IN SIGHT BUT HE CLAIMED WE WERE IN SIGHT. AT 10200 FT AND 5 NM, WE RECEIVED A TA. AT 10400 FT AND 3 NM WE RECEIVED AN RA TO DSND. WE INFORMED ATC AND THEY ACKNOWLEDGED. WE DSNDED 400 FT AND TCASII TOLD US WE WERE CLR OF CONFLICT. WE TOLD ATC WE WERE CLR AND RESUMED OUR CLB.
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.