NTSB CAROL · Event
Event WPR21LA247
Registry · N970AA
FAA Aircraft Registry record.
Make / Model
SHORT BROS SD-360-300
Year of manufacture
1988 · 33 years old at event
Engine
P&W CANADA PT6A-67R (1424 hp)
Seats / Engines
30 seats · 2 engines
Last airworthiness date
20170728
ADS-B equipped
Yes — Mode-S AD83A6
Registrant of record
ACC INTEGRATED SERVICES INC
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The pilot’s failure to extend the landing gear during landing and the check pilot’s inadequate supervision.
Factual narrative
The check pilot reported that, the pilot being evaluated was performing a simulated critical engine failure approach to a local airport. During the visual approach, everything seemed normal until touchdown when both pilots realized that the landing gear had not been extended. The airplane slid to a stop on the runway substantially damaging the lower fuselage. The check pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
Hierarchical cause / factor breakdown from the FAA bulk avdata database. Each finding tagged C (Cause) or F (Factor).
- — Aircraft-Aircraft systems-Landing gear system-Gear extension and retract sys-Not used/operated
- — Personnel issues-Action/decision-Action-Forgotten action/omission-Pilot
- — Personnel issues-Task performance-Use of equip/info-Use of equip/system-Pilot
- — Personnel issues-Psychological-Attention/monitoring-Monitoring other person-Instructor/check pilot
Verbatim from NTSB's published report. Source file
NTSB_2021_WPR21LA247.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…
Browse the full corpus — academia portal ↗