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Believing they had been cleared to climb to a higher altitude the reporter flight failed to level at their assigned altitude and continued climb until the ATC intervened.
| Attributes | |
| ACN | 107652 |
| Time | |
| Date | 198903 |
| Day | Wed |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : pwk |
| State Reference | IL |
| Altitude | msl bound lower : 6000 msl bound upper : 6500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : ord |
| Operator | general aviation : instructional |
| Make Model Name | Small Transport, Low Wing, 2 Turboprop Eng |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 150 flight time total : 8500 |
| ASRS Report | 107652 |
| Person 2 | |
| Affiliation | Other |
| Function | flight crew : first officer |
| Qualification | pilot : commercial pilot : instrument |
| Events | |
| Anomaly | altitude deviation : overshoot non adherence : clearance other anomaly other |
| Independent Detector | other controllera |
| Resolutory Action | controller : issued new clearance flight crew : returned to intended course or assigned course other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Ambiguous |
| Air Traffic Incident | other |
Narrative:
On a part 135 charter with 8 passenger coming out of pwk (north of chicago) with the sic flying the aircraft, I believed that I was cleared by departure from initial altitude of 3000' to 8000', read back that clearance and set the altitude reminder to 8000'. My copilot climbed through 6000' before we received a call questioning our actions, we indicated that we were climbing to 8000' and were told to descend to 6000' and we complied. Confusing factors include that there was a heavy amount of radio traffic and that right before this incident we were told to maintain 150 KTS. We complied and then were told that was for another aircraft (controller apologized for this error) with a similar call sign. This is not a new story in today's environment and I guess the solutions are in careful use of communications and reading back instructions.
Original NASA ASRS Text
Title: BELIEVING THEY HAD BEEN CLRED TO CLIMB TO A HIGHER ALT THE REPORTER FLT FAILED TO LEVEL AT THEIR ASSIGNED ALT AND CONTINUED CLIMB UNTIL THE ATC INTERVENED.
Narrative: ON A PART 135 CHARTER WITH 8 PAX COMING OUT OF PWK (NORTH OF CHICAGO) WITH THE SIC FLYING THE ACFT, I BELIEVED THAT I WAS CLRED BY DEP FROM INITIAL ALT OF 3000' TO 8000', READ BACK THAT CLRNC AND SET THE ALT REMINDER TO 8000'. MY COPLT CLBED THROUGH 6000' BEFORE WE RECEIVED A CALL QUESTIONING OUR ACTIONS, WE INDICATED THAT WE WERE CLBING TO 8000' AND WERE TOLD TO DSND TO 6000' AND WE COMPLIED. CONFUSING FACTORS INCLUDE THAT THERE WAS A HEAVY AMOUNT OF RADIO TFC AND THAT RIGHT BEFORE THIS INCIDENT WE WERE TOLD TO MAINTAIN 150 KTS. WE COMPLIED AND THEN WERE TOLD THAT WAS FOR ANOTHER ACFT (CTLR APOLOGIZED FOR THIS ERROR) WITH A SIMILAR CALL SIGN. THIS IS NOT A NEW STORY IN TODAY'S ENVIRONMENT AND I GUESS THE SOLUTIONS ARE IN CAREFUL USE OF COMS AND READING BACK INSTRUCTIONS.
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.