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DA20 flight crew overshot assigned altitude and conflict with A310. Pilot questions incorrect readback not challenged by ZID.
| Attributes | |
| ACN | 513872 |
| Time | |
| Date | 200106 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : zid.artcc |
| State Reference | IN |
| Altitude | msl bound lower : 27000 msl bound upper : 28000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | general aviation : corporate |
| Make Model Name | Falcon 50 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | descent : vacating altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Controlling Facilities | artcc : zid.artcc |
| Operator | common carrier : air carrier |
| Make Model Name | A310 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise : level |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : first officer |
| Experience | flight time last 90 days : 48 flight time total : 9125 flight time type : 1510 |
| ASRS Report | 513872 |
| Person 2 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : clearance |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued advisory controller : issued new clearance flight crew : returned to assigned altitude |
| Consequence | faa : investigated faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 25860 vertical : 700 |
| Supplementary | |
| Problem Areas | ATC Human Performance Flight Crew Human Performance |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
This appears to be a hearing, readback, hearing problem. Initial descent from FL390 to FL330. I read back clearance, reset altitude alert and pressurization. Before level at FL330, received clearance to FL310, read back by me, reset altitude alert and pressurization. Next clearance I heard, was to FL240, read back FL240. Reset alert and pressurization to landing field elevation. Not challenged on readback by my partner, we both agreed on FL240, or by controller. Have been told by ZID tapes have our clearance to FL280, and then my readback to FL240. Both clearly heard on tape. My questions: 1) where did my partner and I get 240? 2) when I read it back to controller, why was I not challenged on my error? Did not seem to be a busy sector, not a lot of traffic on frequency. Leaving FL277, controller asked for our assigned altitude. Replied FL240, he said 'no, climb to FL280 and a 60 degree left turn.' other aircraft given a right 40 degree right turn. We saw other aircraft visually and on TCASII. No TCASII alerts or warnings. I do not know where I got FL240 from, but my partner and I had agreed on that altitude, and that was what I read back to controller.
Original NASA ASRS Text
Title: DA20 FLC OVERSHOT ASSIGNED ALT AND CONFLICT WITH A310. PLT QUESTIONS INCORRECT READBACK NOT CHALLENGED BY ZID.
Narrative: THIS APPEARS TO BE A HEARING, READBACK, HEARING PROB. INITIAL DSCNT FROM FL390 TO FL330. I READ BACK CLRNC, RESET ALT ALERT AND PRESSURIZATION. BEFORE LEVEL AT FL330, RECEIVED CLRNC TO FL310, READ BACK BY ME, RESET ALT ALERT AND PRESSURIZATION. NEXT CLRNC I HEARD, WAS TO FL240, READ BACK FL240. RESET ALERT AND PRESSURIZATION TO LNDG FIELD ELEVATION. NOT CHALLENGED ON READBACK BY MY PARTNER, WE BOTH AGREED ON FL240, OR BY CTLR. HAVE BEEN TOLD BY ZID TAPES HAVE OUR CLRNC TO FL280, AND THEN MY READBACK TO FL240. BOTH CLRLY HEARD ON TAPE. MY QUESTIONS: 1) WHERE DID MY PARTNER AND I GET 240? 2) WHEN I READ IT BACK TO CTLR, WHY WAS I NOT CHALLENGED ON MY ERROR? DID NOT SEEM TO BE A BUSY SECTOR, NOT A LOT OF TFC ON FREQ. LEAVING FL277, CTLR ASKED FOR OUR ASSIGNED ALT. REPLIED FL240, HE SAID 'NO, CLB TO FL280 AND A 60 DEG L TURN.' OTHER ACFT GIVEN A R 40 DEG R TURN. WE SAW OTHER ACFT VISUALLY AND ON TCASII. NO TCASII ALERTS OR WARNINGS. I DO NOT KNOW WHERE I GOT FL240 FROM, BUT MY PARTNER AND I HAD AGREED ON THAT ALT, AND THAT WAS WHAT I READ BACK TO CTLR.
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.