The following is an in-depth analysis and breakdown of the U.S. commercial aircraft inventory. Large certificated air carriers are required to submit airframe data to the Department of Transportation (DoT) on an annual basis. The Bureau of Transportation Statistics (BTS) is providing this data in its Schedule B-43 datafile. The data was cleaned up and heavily processed for this report, more details were added, and errors were corrected by double checking with airline websites and other fleet data sources. This report uses 2010 as the baseline for historic comparisons, as much has happened over the past 10-15 years; however, the trends are still clearly visible. Going back further to 2000 or earlier would have added no value other than the ability to conclude that the fleet was even more different back then. Also, we decided to provide annual data for the past five years to give the reader a solid understanding of the most recent developments. Finally, this report provides near-term fleet growth guidance based on air traffic trends and a long-term forecast for annual average fleet growth out to 2042.