NTSB CAROL · Event
Event NYC96LA077
Registry · N221CW
FAA Aircraft Registry record.
Make / Model
ALEXANDER SCHLEICHER GMBH & CO ASK 21
Year of manufacture
2015
Engine
NONE NONE
Seats / Engines
2 seats · 1 engine
Last airworthiness date
20160108
ADS-B equipped
Yes — Mode-S A1E4FF
Registrant of record
CENTRAL INDIANA SOARING SOCIETY
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
the flight instructor's inadequate supervision in that he delayed corrective action in recovering the low rotor RPM resulting in a loss of control.
Factual narrative
On March 23, 1996, at 0832 eastern standard time, a Robinson R22-Beta, N221CW, was substantially damaged during a collision with terrain, while hovering at the Essex County Airport, Fairfield, New Jersey. The certified flight instructor and student pilot were not injured. Visual meteorological conditions prevailed for the instructional flight that originated at Essex County Airport (CDW), at 0810. No flight plan had been filed for the flight conducted under 14 CFR Part 91. In the certified flight instructor's (CFI) written statement, he said: "...The student had the controls and was making a landing from a hover. Winds were approximately 15 knots from the west. After landing, the helicopter made an immediate takeoff and drifted to the left rear with low rotor RPM light and horn...[I] immediately took the controls and attempted to increase throttle and stabilize the helicopter with cyclic input, but by that time the helicopter was uncontrollable. It then entered a 720 degree spin, settled to the ground and rolled onto it's left side..." According to the student pilot (SP), he was setting the helicopter down from a 3-foot-hover when the low RPM warning horn activated. The SP stated that the CFI then took over the controls. The SP further stated: "...The PIC tried to roll on throttle to get rotor RPM back in the green. He tried to pull back on the cyclic and the tail rotor hit the ground. The helicopter then did a 720 [degree turn] and hit the ground." Examination of the wreckage revealed no pre-impact failure of the helicopter controls or drive train. The tail rotor section, which included the blades, hub, gear box, and upper and lower vertical fins, were separated from the tail boom. These components were located about 50 feet northwest of the main wreckage. One tail rotor blade had separated from the hub. The main rotor blades were curved upwards and formed a bow shape. The certified flight instructor (CFI) and student pilot had been performing hover practice. During an ascent to a hover, the helicopter drifted left and rearward, and the main rotor RPM decayed. The CFI took over the controls and attempted to stabilize the helicopter, when the helicopter's tail rotor struck the ground. The helicopter then spun 720 degrees, struck the ground and rolled over. Examination of the wreckage revealed no preimpact failure of the helicopter controls or drive train. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1996_NYC96LA077.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 (loss of control). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- Embry-Riddle Scholarly Commons 2025 · Journal article (JAAER)
A Scoping Review of Aviation Loss of Control Inflight Research
Loss of control – inflight (LOC-I) contributes to aircraft accidents at unacceptably high rates. Significant industry efforts and research have aimed to improve LOC-I prevention, detection, and recove…
- SKYbrary (Eurocontrol) 2024 · SKYbrary article
Loss of Control In-Flight (LOC-I) — SKYbrary Knowledge Base
SKYbrary comprehensive knowledge-base entry on Loss of Control In-Flight — definitions, contributing factors, accident case studies (Air France 447, Colgan 3407), and prevention strategies.
- NTSB Aircraft Accident Reports 2022 · Accident report
Loss of Control on Takeoff in Icing Conditions — Citation 560XL
Cessna Citation 560XL fatal takeoff icing accident, March 2018. Investigation of a Citation 560XL loss-of-control takeoff accident in icing conditions.
- Semantic Scholar 2021 · Article (Aviation)
ANALYSIS OF GENERAL AVIATION FIXED-WING AIRCRAFT ACCIDENTS INVOLVING INFLIGHT LOSS OF CONTROL USING A STATE-BASED APPROACH
Inflight loss of control (LOC-I) is a significant cause of General Aviation (GA) fixed-wing aircraft accidents. The United States National Transportation Safety Board’s database provides a rich source…
- NASA NTRS 2021 · Presentation
Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
Abstract—We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.
- NASA NTRS 2021 · Conference Paper
Use of Design of Experiments in Determining Neural Network Architectures for Loss of Control Detection
We describe empirical methods for selecting a neural network architecture to implement belief state inference on generic commercial transport aircraft.
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