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Emb-175 flight crew reported loss of performance/thrust management computer system malfunction during takeoff rotation.
| Attributes | |
| ACN | 1684906 |
| Time | |
| Date | 201909 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | EMB ERJ 170/175 ER/LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Takeoff |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | PMC Performance/Thrust Management Computer |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Not Flying |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Speed All Types Deviation - Track / Heading All Types |
Narrative:
Upon rotation the command bars switched to the flight director. The lateral mode switched to roll and the vertical mode went to altitude. The autothrottles retarded and the flight director was commanding level off. I manually pushed the throttles forward and pitched the plane to approximately 15 degrees up. I asked the first officer for heading and flight level change. We went to manual speeds as the speed schedule was not sequencing either. Once at a safe altitude and on course we went back to LNAV and VNAV. Upon decent into ZZZ1 we did not have a VNAV profile and were unable to fly the STAR as published and received guidance from ATC. About 50 miles out of sea the VNAV profile populated.
Original NASA ASRS Text
Title: EMB-175 flight crew reported loss of Performance/Thrust Management Computer system malfunction during takeoff rotation.
Narrative: Upon rotation the command bars switched to the flight director. The lateral mode switched to roll and the vertical mode went to ALT. The Autothrottles retarded and the flight director was commanding level off. I manually pushed the throttles forward and pitched the plane to approximately 15 degrees up. I asked the First Officer for heading and flight level change. We went to manual speeds as the speed schedule was not sequencing either. Once at a safe altitude and on course we went back to LNAV and VNAV. Upon decent into ZZZ1 we did not have a VNAV profile and were unable to fly the STAR as published and received guidance from ATC. About 50 miles out of SEA the VNAV profile populated.
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.