# NTSB MIA83LA196: Bell 47G-2, N471KC, Miami, FL, August 5, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 5, 1983, 17:14 local (21:14 UTC)
- Place: Miami, FL
- Coordinates: 25.650516, -80.409446 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=25.6505&lon=-80.4094&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 30923
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA83LA196
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/30923/pdf
- Page: https://openairdocs.org/ntsb/MIA83LA196

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- In flight collision with terrain/water, landing
  - rotorcraft flight controls - improper use of, dual student (cause)
  - habit interference, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)

## Analysis

THE STUDENT WAS A RATED SINGLE ENG, MULTIENGINE, LAND PLT, BUT DID NOT HAVE A HELICOPTER RATING. DURING A DUAL INSTRUCTIONAL FLT, HE HAD JUST COMPLETED THE FINAL PHASE OF AN AUTOROTATION & THE SKIDS WERE ON THE GROUND, WHEN HE ABRUPTLY PULLED THE COLLECTIVE PITCH TO THE FULL UP POSITION. ACCORDING TO HIS INSTRUCTOR (CFI), THE HELICOPTER LIFTED OFF THE GROUND, THEN THE STUDENT PULLED THE CYCLIC FULL AFT & TO THE RIGHT & FROZE ON THE CONTROLS. THE CFI REPORTED THAT HE OVERPOWERED THE CYCLIC TO LEVEL THE HELICOPTER & WAITED FOR THE IMPACT. THE MAIN ROTOR BLADES, TAIL ROTOR ASSEMBLY, TAIL BOOM, CROSS TUBES & SKIDS WERE DAMAGED.

## Aircraft

- Registration: [N471KC](https://openairdocs.org/deregistered/N471KC-2018-01-24), registration cancelled 2018-01-24, S/N 2422, built 1959 (OpenAirDocs)
- Reported make and model: BELL 47G-2
- Registry model: [Bell 47G-2](https://openairdocs.org/model/bell-47g-2) (registry code 1181008) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 2422
- Airframe hours: 9147
- Engines: LYCOMING VO-435 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Burnside Ott Aviation Training
- Last inspection: Annual, March 15, 1983, 93 hours before
- Airport: TMB, Tamiami

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: right; flight hours: 9,035 total, 33 in this make and model, 8,617 as pilot in command, 255 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 150° at 7 knots
- Visibility: 8 statute miles
- Lowest ceiling: 20,000 ft overcast
- Temperature: 86 °F, dew point 73 °F
- Altimeter: 30.00 inHg
- Observed at: TMB

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19830805043599A](https://openairdocs.org/incident/19830805043599A), Aug 5, 1983: Bell 47G2, Miami, FL, Substantial damage. Student pulled up collective after touchdown and full aft cyclid. Low RPM and aft cyclic, rotors severed tailboom.

## Other investigations on N471KC (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB ATL07LA052](https://openairdocs.org/ntsb/ATL07LA052), Mar 17, 2007: Bell 47G2A (N471KC), Huntsville, AL, destroyed. Probable cause: The loss of engine power due to undetermined reasons.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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