Flight Crew Air Transport Pilot (ATP)
Human-Machine Interface; Situational Awareness; Distraction
Aircraft Equipment Problem Less Severe; Deviation - Speed All Types; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew FLC Overrode Automation
Procedure; Company Policy
Revised company procedures require us to use a new steeper climb profile. If flying an RNAV departure the autopilot should be engaged at 500 feet as per our manual. We did exactly that. Just above FRA the pusher activated and the autopilot disengaged. At FRA I selected FLC for a brief moment to gain some speed; but then I followed the company climb profile for the DEN RNAV departures; and selected VS/1000 fpm. Just 2 seconds later the plane stalled. In Denver with our new steeper climb profile it's normal to constantly see the PLI [Pitch Limit Indicator] in a calm wind day. So at the middle of the summer I'm pretty sure I wasn't the fist one who had the stick pusher activated following company procedures.The largest threat in this case is our company issued climb procedure combined with summer thermals.To prevent this from happening again I could disregard company procedures; could make a shallower climb; and engage the autopilot over 200K. If I missed something; please let me know.
An EMB-145 Captain advised his company's revised vertical navigation SOP to provide greater climb angles to comply with altitude restrictions on RNAV SIDs from DEN exceed the aircraft's performance capability and resulted in a stall.