 |
37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
|
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.
| Attributes | |
| ACN | 1198376 |
| Time | |
| Date | 201408 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | DEN.Airport |
| State Reference | CO |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 145 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Climb |
| Route In Use | SID RNAV |
| Flight Plan | IFR |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Speed All Types |
Narrative:
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 flight crew 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.
Original NASA ASRS Text
Title: 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.
Narrative: 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.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.