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Inappropriate and confusing autoflight functions while flying the sna runway 19 noise abatement procedure may have resulted in a flap overspeed during the period of time the flight crew of the B757-200 contemplated an appropriate response.
| Attributes | |
| ACN | 989357 |
| Time | |
| Date | 201201 |
| Local Time Of Day | 0601-1200 |
| Place | |
| Locale Reference | SNA.Airport |
| State Reference | CA |
| Aircraft 1 | |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Initial Climb |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Autoflight System |
| Person 1 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer 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:
On takeoff out of sna on the RNAV noise abatement procedure with the autopilot engaged in VNAV the aircraft pitched up and slowed below V2 by about 10 KTS. We disconnected the autopilot and pitched the nose over to regain speed. No stall warning or stick shaker occurred. Subsequently; on flap retraction; we later learned we had a 5-8 KT flap overspeed.
Original NASA ASRS Text
Title: Inappropriate and confusing autoflight functions while flying the SNA Runway 19 Noise Abatement Procedure may have resulted in a flap overspeed during the period of time the Flight Crew of the B757-200 contemplated an appropriate response.
Narrative: On takeoff out of SNA on the RNAV Noise Abatement Procedure with the autopilot engaged in VNAV the aircraft pitched up and slowed below V2 by about 10 KTS. We disconnected the autopilot and pitched the nose over to regain speed. No stall warning or stick shaker occurred. Subsequently; on flap retraction; we later learned we had a 5-8 KT flap overspeed.
Data retrieved from NASA's ASRS site as of July 2013 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.