Originally Posted by
tonker
Can anyone tell me if there is any regulatory information that demands that information on the CDU must reflect the SID?
ie Your first stop altitude is 4,000 feet hard altitude, and ATC clear you to 4,000 feet. Why not then delete the 4,000 feet hard altitude? Not an SOP or flying manual question, but a regulatory question. Is it written down somewhere by EASA CAA FAA etc
First, there is no regulation requiring a CDU. you can fly a VOR/DME-based SID using raw VOR and DME data if you like.
HOWEVER, if you are flying an RNAV SID, with authorization to do so in an OpSpec or LoA, you must follow the applicable regulations for the level of RNAV you are using. For example, if flying an RNAV1 or RNAV2 SID, you must use an autopilot or flight director. Either of those would be difficult to use without the correct information in the CDU. OTOH, you MIGHT be able to use the MCP in place of CDU altitude constraints, but why would you?