Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Inflight Event / Encounter Unstabilized Approach
Flight Crew Became Reoriented
Human Factors
During the visual approach backed up with the LOC-DME 26R at Miami; I selected V/S taking us out of the pre-briefed LOC and VNAV configuration I had briefed. I said nothing. I simply wanted a shallower glide path that agreed with the PAPI. As we came through about 300 FT AGL; I was curious about the VNAV path and mashed VNAV. Yes; I know better. The throttles drove up of course and I clicked the A/T off. I judged myself to be slightly high at the 100 FT callout and the FO called out 'plus 10kt.' At 500 FT; the call was stable; target. We landed; the FO called '4000 FT remaining' and we turned off at L3 or L2. I need to be disciplined to fly the plan especially close in to the runway. Alternatively; calling out the FMS inputs would have made a difference. The original switch to V/S would have given the experienced FO the SA to respond to the 'VNAV' input with a N-o-o-o.
Approach normal until about 250 feet. At 250 feet Pilot flying engaged VNAV and the throttles advanced causing an increase in speed. Captain (Pilot Flying) disengaged auto throttles and made a correction to get speed back to approach speed. We crossed the threshold a little fast; maybe +10 knots and landed longer than intended. I felt uncertain of whether I should call for a go around and ultimately; I did not.
B767-300ER flight crew reported an unstabilized approach while non-standard use of automation was flown into MIA.