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Air carrier-light transport heard clearance to climb to 12000' and climbed into conflict with an air carrier-medium large transport already at 12000'.
| Attributes | |
| ACN | 86546 |
| Time | |
| Date | 198805 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | atc facility : ipt airport : elm |
| State Reference | PA |
| Altitude | msl bound lower : 11000 msl bound upper : 11700 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | Light Transport |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Medium Large Transport |
| Flight Phase | cruise other |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : cfi pilot : commercial pilot : instrument |
| Experience | flight time last 90 days : 75 flight time total : 1700 flight time type : 50 |
| ASRS Report | 86546 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : cfi pilot : instrument pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 4000 flight time type : 1000 |
| ASRS Report | 86994 |
| Events | |
| Anomaly | altitude deviation : overshoot conflict : airborne less severe non adherence : required legal separation |
| Independent Detector | other controllera |
| Resolutory Action | none taken : detected after the fact other |
| Consequence | Other |
| Miss Distance | horizontal : 2500 vertical : 300 |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Light transport X was given an initial altitude of 16000'. Then, while in the climb, we were told to stop at 11000'. The captain repeated what I believe to be an altitude of 12000', which is what we both thought center had said. Setting the altitude alert for 12000', we continued the climb. When passing through 11000', center called to medium large transport Y and made a traffic advisory to him, then he advised us on medium large transport Y. We acknowledged a visual on medium large transport Y. Upon noticing medium large transport Y's altitude we queried ATC about our altitude clearance, at which point ATC advised us of our deviation and said it would be investigated. Could have been avoided if ATC had confirmed altitude clearance on readback.
Original NASA ASRS Text
Title: ACR-LTT HEARD CLRNC TO CLIMB TO 12000' AND CLIMBED INTO CONFLICT WITH AN ACR-MLG ALREADY AT 12000'.
Narrative: LTT X WAS GIVEN AN INITIAL ALT OF 16000'. THEN, WHILE IN THE CLB, WE WERE TOLD TO STOP AT 11000'. THE CAPT REPEATED WHAT I BELIEVE TO BE AN ALT OF 12000', WHICH IS WHAT WE BOTH THOUGHT CENTER HAD SAID. SETTING THE ALT ALERT FOR 12000', WE CONTINUED THE CLB. WHEN PASSING THROUGH 11000', CENTER CALLED TO MLG Y AND MADE A TFC ADVISORY TO HIM, THEN HE ADVISED US ON MLG Y. WE ACKNOWLEDGED A VISUAL ON MLG Y. UPON NOTICING MLG Y'S ALT WE QUERIED ATC ABOUT OUR ALT CLRNC, AT WHICH POINT ATC ADVISED US OF OUR DEVIATION AND SAID IT WOULD BE INVESTIGATED. COULD HAVE BEEN AVOIDED IF ATC HAD CONFIRMED ALT CLRNC ON READBACK.
Data retrieved from NASA's ASRS site as of August 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.