yr re=urring) (Due 7/27/2013) $350,000.4 weeks down time (howe=er there are exchange options available for the -7B engine). February 2014: C Check (General Desc=iption: Two year items) Estimated Cost $175,000 2 weeks d=wn time. Engines No.1 and No,3 HPC AD 2003-16-05 (amd.39-=3258) (9 yr recurring) $350,000