GAA18CA012
2017-10-12 · Canton, Illinois, United States · None · 1 aircraft · Status: Completed
Airport CTK
Current FAA registration · N140SF
- Make / Model
- EUROCOPTER DEUTSCHLAND GMBH MBB-BK 117 C-2
- Year of manufacture
- 2010 · 7 years old at event
- Engine
- TURBOMECA ARRIEL 1E2 (708 hp)
- Seats / Engines
- 8 seats · 2 engines
- Last airworthiness date
- 20110923
- ADS-B equipped
- Yes — Mode-S A0A446
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The flight instructor's incorrect cyclic control during a hover, which resulted in a hard landing.
Factual narrative
The helicopter flight instructor reported that he was training a new company pilot at night, and they were using night vision goggles. He added that, while in a hover, he attempted to demonstrate the use of the controllable search light to the pilot in the right seat. The flight instructor added that, "to adjust the light, I took the [left] cyclic in my left hand which would normally be holding the left collective and attempted to reach the control switch for the light and grabbed the throttles of the right collective with my right hand. My right hand would normally be on the left cyclic." He further added that, he then inadvertently pushed down on the collective and the helicopter began to settle on the runway. He reported in response "my reflex was to pull up with my left hand (which would normally be on the collective)," and when he did so the helicopter moved rearward. Subsequently, he "pushed the cyclic forward to correct" the rearward movement, but in doing so, the helicopter touched down hard and the main rotor impacted the upper wire strike protection unit. The main rotor sustained substantial damage. The flight instructor reported that there were no preaccident mechanical malfunctions or failures with the helicopter that would have precluded normal operation. The helicopter flight instructor reported that he was training a new company pilot at night, and they were using night vision goggles. He added that, while in a hover, he attempted to demonstrate the use of the controllable search light to the pilot in the right seat. The flight instructor added that, "to adjust the light, I took the [left] cyclic in my left hand which would normally be holding the left collective and attempted to reach the control switch for the light and grabbed the throttles of the right collective with my right hand. My right hand would normally be on the left cyclic." He further added that he then inadvertently pushed down on the collective, and the helicopter began to settle on the runway. He reported that in response "[his] reflex was to pull up with [his] left hand (which would normally be on the collective)," and when he did so the helicopter moved rearward. Subsequently, he "pushed the cyclic forward to correct" the rearward movement, but in doing so, the helicopter touched down hard, and the main rotor impacted the upper wire strike protection unit. The main rotor sustained substantial damage. The flight instructor reported that there were no preaccident mechanical malfunctions or failures with the helicopter that would have precluded normal operation. Source: NTSB Aviation Accident Database Retrieved: 2026-02-12
NTSB Findings
FAA avdata. C = Cause, F = Factor.
- C Personnel issues-Task performance-Use of equip/info-Aircraft control-Instructor/check pilot - C
- C Aircraft-Aircraft oper/perf/capability-Performance/control parameters-Pitch control-Incorrect use/operation - C
- — Environmental issues-Physical environment-Object/animal/substance-(general)-Contributed to outcome
Verbatim from NTSB's published report. Source file
NTSB_2017_GAA18CA012.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
Search this event elsewhere
External sources are reported, not agency: signal that something happened, not fact about what happened.
- TallyAero Live Wire Aviation press
- NTSB CAROL Agency ↗
- NTSB Docket Agency ↗
- Aviation Safety Network Aviation press ↗
- Kathryn's Report Aviation press ↗
- Aviation Herald Aviation press ↗
- AVweb Aviation press ↗
- Pilots of America Community ↗
- Reddit /r/flying Community ↗
- FlightAware Aviation press ↗
- AOPA accident database Aviation press ↗
- Google News News ↗
- DuckDuckGo News ↗