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Captain of a canadair, CL65, overshot descent altitude due to missetting the altitude capture mode on the autoplt. When climbing back to assigned, a TCASII RA gave conflict alert and resolution on an aircraft above so he leveled off the aircraft. In the meantime, the radio communication was too low and they missed ATC calls for altitude amendment.
| Attributes | |
| ACN | 431561 |
| Time | |
| Date | 199903 |
| Day | Tue |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | navaid : jst.vortac |
| State Reference | PA |
| Altitude | msl bound lower : 24000 msl bound upper : 25000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Challenger CL604 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | other other vortac |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : har.bunts1 |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zny.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | descent : intermediate altitude |
| Route In Use | arrival star : har.bunts1 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : multi engine pilot : commercial pilot : atp pilot : instrument |
| Experience | flight time last 90 days : 160 flight time total : 5200 flight time type : 1100 |
| ASRS Report | 431561 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : far non adherence : clearance |
| Independent Detector | aircraft equipment : tcas other flight crewa |
| Resolutory Action | flight crew : took precautionary avoidance action |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 3000 vertical : 1000 |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
We were asked to descend to cross cofax at and maintain FL250. We read back the command and set the altitude into the altitude capture mode. I set vertical speed mode to approximately 1200 FPM and we began to descend from FL310. The first officer left the center frequency to get ATIS and I thought I had the speaker volume up high enough to hear the frequency (center) but did not. We flew in silence missing a center xfer. Several mins later, we were over cofax and I looked at our altitude tape that was going through FL245. I pushed altitude hold and the autoplt leveled off at FL240. I began to climb back to FL250 and we got a TA showing an aircraft above us by +900 ft. I stopped at approximately FL240 and we contacted ZNY. They told us to call them when we landed. We noticed that we had misset the altitude capture to FL216 and failed to doublechk it.
Original NASA ASRS Text
Title: CAPT OF A CANADAIR, CL65, OVERSHOT DSCNT ALT DUE TO MISSETTING THE ALT CAPTURE MODE ON THE AUTOPLT. WHEN CLBING BACK TO ASSIGNED, A TCASII RA GAVE CONFLICT ALERT AND RESOLUTION ON AN ACFT ABOVE SO HE LEVELED OFF THE ACFT. IN THE MEANTIME, THE RADIO COM WAS TOO LOW AND THEY MISSED ATC CALLS FOR ALT AMENDMENT.
Narrative: WE WERE ASKED TO DSND TO CROSS COFAX AT AND MAINTAIN FL250. WE READ BACK THE COMMAND AND SET THE ALT INTO THE ALT CAPTURE MODE. I SET VERT SPD MODE TO APPROX 1200 FPM AND WE BEGAN TO DSND FROM FL310. THE FO LEFT THE CTR FREQ TO GET ATIS AND I THOUGHT I HAD THE SPEAKER VOLUME UP HIGH ENOUGH TO HEAR THE FREQ (CTR) BUT DID NOT. WE FLEW IN SILENCE MISSING A CTR XFER. SEVERAL MINS LATER, WE WERE OVER COFAX AND I LOOKED AT OUR ALT TAPE THAT WAS GOING THROUGH FL245. I PUSHED ALT HOLD AND THE AUTOPLT LEVELED OFF AT FL240. I BEGAN TO CLB BACK TO FL250 AND WE GOT A TA SHOWING AN ACFT ABOVE US BY +900 FT. I STOPPED AT APPROX FL240 AND WE CONTACTED ZNY. THEY TOLD US TO CALL THEM WHEN WE LANDED. WE NOTICED THAT WE HAD MISSET THE ALT CAPTURE TO FL216 AND FAILED TO DOUBLECHK IT.
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.