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37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Flight crew climb to occupied altitude controller issued 7000 ft. Flight crew readback 8000 ft TCASII RA evasive action taken. Air carrier X had less than standard separation from air carrier Y.
| Attributes | |
| ACN | 184223 |
| Time | |
| Date | 199107 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : hrk |
| State Reference | WI |
| Altitude | msl bound lower : 7000 msl bound upper : 8000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : mke |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | climbout : intermediate altitude descent other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport, Low Wing, 2 Turbojet Eng |
| Flight Phase | cruise other |
| Route In Use | enroute : direct |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 160 flight time total : 8000 flight time type : 160 |
| ASRS Report | 184223 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 120 flight time total : 6500 flight time type : 1600 |
| ASRS Report | 184409 |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : required legal separation non adherence : published procedure non adherence : clearance |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other controllera |
| Resolutory Action | controller : issued new clearance flight crew : took evasive action other |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 12000 vertical : 500 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Pilot Deviation Operational Error |
Narrative:
Air carrier X departed to the south from mke with a clearance to 8000 ft. ATC called wbound air carrier Y at 8000 ft which we sighted. Our TCAS gave a RA to limit the climb to 500 FPM or less, which we complied to. ATC told us to descend back down to 7000 ft just as we were reaching 7500 ft. Upon reaching 7000 ft we received a TA for other 7000 ft traffic from our TCAS. This was followed by a RA to climb at least 2000 FPM, which we complied to. The 7000 ft traffic was never sighted. Callback conversation with reporter revealed the following information: reporter stated 8000 ft traffic was an air carrier medium large transport. The controller had told air carrier X they had been assigned 7000 ft. Reporter had talked with approach control but they did not get back to him about altitude. Reporter stated he thought the 7000 ft TCASII RA was a false target. Reporter stated the flight crew had readback 8000 and set it in the altitude alert.
Original NASA ASRS Text
Title: FLC CLB TO OCCUPIED ALT CTLR ISSUED 7000 FT. FLC READBACK 8000 FT TCASII RA EVASIVE ACTION TAKEN. ACR X HAD LTSS FROM ACR Y.
Narrative: ACR X DEPARTED TO THE S FROM MKE WITH A CLRNC TO 8000 FT. ATC CALLED WBOUND ACR Y AT 8000 FT WHICH WE SIGHTED. OUR TCAS GAVE A RA TO LIMIT THE CLB TO 500 FPM OR LESS, WHICH WE COMPLIED TO. ATC TOLD US TO DSND BACK DOWN TO 7000 FT JUST AS WE WERE REACHING 7500 FT. UPON REACHING 7000 FT WE RECEIVED A TA FOR OTHER 7000 FT TFC FROM OUR TCAS. THIS WAS FOLLOWED BY A RA TO CLB AT LEAST 2000 FPM, WHICH WE COMPLIED TO. THE 7000 FT TFC WAS NEVER SIGHTED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED 8000 FT TFC WAS AN ACR MLG. THE CTLR HAD TOLD ACR X THEY HAD BEEN ASSIGNED 7000 FT. RPTR HAD TALKED WITH APCH CTL BUT THEY DID NOT GET BACK TO HIM ABOUT ALT. RPTR STATED HE THOUGHT THE 7000 FT TCASII RA WAS A FALSE TARGET. RPTR STATED THE FLC HAD READBACK 8000 AND SET IT IN THE ALT ALERT.
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.