Narrative:

Took off from teb on the ruudy 2 departure and contacted new york. The first officer checked on the departure frequency of 126.7 and climbing out of 1;000 ft ATC said to climb to 8;000 ft and resume normal airspeed. The first officer responded; 'climb 8;000 ft and normal airspeed.' while climbing out of 4;000 ft; the controller asked us what altitude we were cleared to. The first officer responded 'you just cleared us to 8;000 ft and normal airspeed.' ATC said 'that was for another aircraft.' after a short pause ATC cleared us to maintain 7;000 ft. I was the captain of the flight and the flying pilot.

Google
 

Original NASA ASRS Text

Title: An air taxi Captain reported that while at 1;000 FT climbing on the TEB RUUDY 2 Departure the crew thought they heard ATC clear them to 8;000 FT and normal speed. ATC reassigned 7;000 FT after seeing them climbing at 4;000 FT.

Narrative: Took off from TEB on the RUUDY 2 Departure and contacted New York. The First Officer checked on the Departure Frequency of 126.7 and climbing out of 1;000 FT ATC said to climb to 8;000 FT and resume normal airspeed. The First Officer responded; 'climb 8;000 FT and normal airspeed.' While climbing out of 4;000 FT; the Controller asked us what altitude we were cleared to. The First Officer responded 'You just cleared us to 8;000 FT and normal airspeed.' ATC said 'That was for another aircraft.' After a short pause ATC cleared us to maintain 7;000 FT. I was the Captain of the flight and the flying pilot.

Data retrieved from NASA's ASRS site as of April 2012 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.