B737 VNAV ALT Intervention Techniques
Hello everyone,
I just started training on B737 and had few observation flights on B737 last week. Reading off the book and applying in real ops is not the right learning process, however there were few scenarios that conflicted with my understanding when captain manipulated VNAV ALT INTV.
ALT INTV cancels any FMC restriction during climb/descent which are lower/hihger than MCP setting. When VNAV PATH or VNAV ALT and you were instructed to climb higher or lower, you set new MCP ALT and press ALT INTV and plance will continue to climb/descend (putting this as simple as possible)
From what I have noticed was that, we were VNAV ALT and soon instructed to climb higher, captain sets the new ALT on MCP and set LVL CHNG and VNAV right away. (After plane began positve climb).
It was done in a similar way during the descent and going through FCOM and FCTM does not really relieve me of curiosity on that day.
Looking forwad to ideas and comments.