NTSB CAROL · Event
Event CHI04CA229
Registry · N96MB
FAA Aircraft Registry record.
Make / Model
CESSNA C90GTI
Year of manufacture
2018
Engine
P&W CANADA PT6A-135A (750 hp)
Seats / Engines
6 seats · 2 engines
Last airworthiness date
20181211
ADS-B equipped
Yes — Mode-S AD5AE2
Registrant of record
BORNER MICHAEL
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The engine failure for an undetermined reason, and the pilot's inability to properly level-off for landing due to the low rotor speed, which resulted in the hard landing. The low altitude where the engine failure occurred was a factor.
Factual narrative
On August 14, 2004, about 1500 eastern standard time, a Bell 47G2 helicopter, N96MB, piloted by a private pilot, was destroyed when it impacted the ground during an attempted forced landing. The helicopter was on initial climb after takeoff when it experienced a loss of engine power. The 14 CFR Part 91 personal flight was operating in visual meteorological conditions without a flight plan. The pilot and his one passenger were not injured. The helicopter had just departed the Reese Airport, Muncie, Indiana, for a local flight. The pilot reported that he had taken off from the Reese Airport and had made a turn to parallel the runway when he heard two loud "bangs" from the engine after which the engine stopped producing power. The pilot stated that he was at 50 feet and 45 miles per hour when the power loss occurred. The pilot stated that he performed an autorotation to a flat area near the airport. He stated that as he "approached touchdown [he] raised collective to cushion the impact but with so little altitude an autorotation gave very little rotor speed." He stated that the helicopter struck the ground in a level attitude while moving forward, the skids collapsed and the helicopter broke apart. A postaccident examination of the helicopter was conducted. During the examination, the engine was found to rotate. The engine produced compression on all cylinders when rotated by hand. No further components of the engine were tested. The helicopter was damaged when it impacted terrain during an attempted forced landing following a complete loss of engine power. The helicopter had just taken off and was at 50 feet altitude and 45 miles per hour when the pilot heard two loud "bangs" followed by a complete loss of power. The pilot stated that he performed an autorotation to a flat area near the airport. He stated that as he "approached touchdown [he] raised collective to cushion the impact but with so little altitude an autorotation gave very little rotor speed." He stated that the helicopter struck the ground in a level attitude while moving forward, the skids collapsed and the helicopter broke apart. No defects were found with respect to the helicopter's engine. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2004_CHI04CA229.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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