NTSB CAROL · Event
Event MIA90FA117
Aircraft involved
Probable cause & findings
IMPROPER TOUCHDOWN DURING THE AUTOROTATION BY THE DUAL STUDENT (ATP), HIS FAILURE TO MAINTAIN RUNWAY ALIGNMENT, INADEQUATE SUPERVISION BY THE CFI, AND INADEQUATE CREW COORDINATION. A FACTOR RELATED TO THE ACCIDENT WAS THE OBSTRUCTION (TAXIWAY LIGHT).
Factual narrative
THE HELICOPTER WAS ON A VFR CLIMBOUT FROM A PARALLEL TAXIWAY. THE CFI, WHO WAS ALSO THE PIC, WAS PROVIDING INSTRUCTION TO AN ATP WORKING TOWARDS A CFI RATING. THE CFI INITIATED A SIMULATED ENGINE FAILURE AT 200 FEET AGL AND 60 KTS. THE ATP BEGAN AN AUTOROTATION. AFTER COMPLETING THE DECELERATION AND INITIAL PITCH PULL, THE HELICOPTER CONTACTED THE GROUND, BOUNCED UP, AND SLID TO THE RIGHT AND REARWARD. THE ATP SAW A TAXIWAY LIGHT AND INCREASED COLLECTIVE TO AVOID A COLLISION, BUT EXPERIENCED RESISTANCE ON THE FLIGHT CONTROLS. THE CFI HAD NOT SEEN THE TAXIWAY LIGHT, BUT NOTICED A DECAY IN ENGINE/ROTOR RPM. HE IMMEDIATELY APPLIED DOWNWARD PRESSURE ON THE COLLECTIVE AND LEFT FORWARD CYCLIC TO STOP THE HORIZONTAL MOVEMENT AND LEVEL THE HELICOPTER. THE CFI STATED THAT HE INFORMED THE ATP, HE HAD THE FLIGHT CONTROLS, WHICH COULD NOT BE SUBSTANTIATED BY THE ATP. THE HELICOPTER STRUCK THE TAXIWAY LIGHT AND TAXIWAY WITH THE RIGHT SKID, THEN ENTERED A DYNAMIC ROLLOVER. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1990_MIA90FA117.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (engine failure). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- arXiv 2022 · arXiv preprint
Multi-level Adaptation for Automatic Landing with Engine Failure under Turbulent Weather
This paper addresses efficient feasibility evaluation of possible emergency landing sites, online navigation, and path following for automatic landing under engine-out failure subject to turbulent wea…
- NASA NTRS 2019 · Conference Paper
Simulation of Liquid Rocket Engine Failure Propagation Using Self-Evolving Scenarios
Traditional probabilistic risk assessment approaches often require failure scenarios to be explicitly defined through event sequences that are then quantified as part of the integrated analysis.
- NASA NTRS 2019 · Conference Paper
Rocket engine failure detection using system identification techiques
The theoretical foundation and application of two univariate failure detection algorithms to Space Shuttle Main Engine (SSME) test firing data is presented.
- NASA NTRS 2019 · Conference Paper
Rocket engine failure detection using system identification techniques
The theoretical foundation and application of two univariate failure detection algorithms to Space Shuttle Main Engine (SSME) test firing data is presented.
- NASA NTRS 2019 · Technical Memorandum (TM)
A simulator investigation of engine failure compensation for powered-lift STOL aircraft
A piloted simulator investigation of various engine failure compensation concepts for powered-lift STOL aircraft was carried out at the Ames Research Center.
- Semantic Scholar 2019 · Article (AIAA Scitech 2019 Forum)
Impact of Engine Failure Constraints on the Initial Sizing of Hybrid-Electric GA Aircraft
Potential advantages of hybrid-electric aircraft are fuel savings, lower emissions, and reduced noise. Since these aircraft generally apply multiple power sources, they can also be designed to sustain…
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