Originally Posted by
Aslan
Is there any difference with LVTO in the procedures on the 737 classics or NGs for that matter - standing take offs with 70% N1?? When do you then press the TOGA buttons, on brake release??
Aircraft with the JT8 motors would be spooled up to 1.4 on the EPR to confirm the surge bleed valves closed. The indications would be:
N1 - 74%
N2 - 84%
EGT - 400 degrees
Fuel Flow - 4,000 PPH +/-
An indication of a failed surge bleed valve would be a higer EGT.
Once satisfied the breaks are released and away you go. This could be done on a rolling takeoff, provided thrust was set prior to 60 knots.
On the NG power is increased to 40% N1... look for stabilization of the motors and press TOGA. This can also be done performing a rolling takeoff, provided that takeoff thrust is set prior to 60 knots.