FS2004 – Alaska Airlines Boeing 737-900ER flight2000it 11 years ago FS2004 – Alaska Airlines Boeing 737-900ER, registration N408AS. Model by Project Open Sky. Painted by Joe Shimmel. 5.5 MB FS2004/FSX – Alaska Airlines Boeing 737-900FS2004/FSX – Alaska Airlines Boeing 737-900FS2004 – Delta Airlines Boeing 737-900ER