B738 (U 10.8) VNAV can't connect
It is not writeen in FCOM about this. In CRZ,just passed T/D,and FAM sys MCP SPED and ALT HOLD ,both MCP and FMC alt is FL300.Then ATC required me to desend to FL200.I set mcp alt FL148,then tried to connect VNAV ,but it dosen't work. Then I pished ALT INVT then VNAV it worked.but why???
FCOM only says how to use ALT INVT in VNAV mode,no other information.
How many stuations,in which the VNAV can't be engaged?
Last edited by flyzhz; 22nd Jun 2012 at 05:38.