Challenger crash at KASE

[Mad (Flt) Scientist]

There is of course an abnormal procedure, the issue is that it for a failure case, not for a "selected" partial flap landing. For some training scenarios there is wording in the AFM to allow for deviation from the "normal operating" AFM limitations and procedures, but I don't know from memory if partial flaps is one such case. Often such things are in a "supplementary procedures" section with explicit permission stated to do the specific task.

edit: the only specific references to training appear to be related to the speed limits, where flight above VMO/MMO or below min speed is allowable under specific training conditions, and a change to the ADG speed limit for testing deployment cases. I don't see anything to allow for intentional reduced flap landings, for training or any other purpose.