I have seen the summarised FDR transcripts.
The AC had WoW on left, then right (one second later), then nose (two seconds later than that), within the usual time of touching down (a second or two). The brake pedals were only used some time after (they were first applied about 10 seconds after left gear WoW, and took two seconds to reach max (80 degrees). It is a little odd that the left pedal position fluctuated somewhat, whereas the right pedal stayed at max.
They were running over the tarmac here at 70 meters per second. They went some 700 meters before starting to apply manual braking. That is over one-third of the runway,
with essentially no reduction in speed (about 140 kts, as has been previously reported). They only started to slow when manual braking was used.
Keep in mind that the runway has an LDA of 1880 m [Edited after comment by Our Man]. One can well imagine that things would have been different had manual braking been applied earlier. They would at least have gone off the end more slowly.
TLA was as has been portrayed. The difference between this landing and the previous one at Porto Alegre (same crew, previous leg) is that at Porto Alegre the #2 lever was reduced to idle at touchdown. As one would expect from a crew following SOPs. [Added on edit: At Porto Alegre, both levers were moved in unison to Idle Reverse, then Reverse, back to Idle Reverse, back to Idle]
The puzzle is then to imagine why, at Congonhas later on, they didn't do this.
Or why this data might not represent true TLA, etc.
PBL
Last edited by PBL; 9th Aug 2007 at 14:28.
Reason: Inaccuracies corrected