# NTSB MIA84LA179: Bell 47G-5, N1201W, Jupiter, FL, June 7, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 7, 1984, 08:45 local (12:45 UTC)
- Place: Jupiter, FL
- Coordinates: 27.780067, -80.480094 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=27.7801&lon=-80.4801&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 31141
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA84LA179
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/31141/pdf
- Page: https://openairdocs.org/ntsb/MIA84LA179

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, maneuvering - aerial application
  - bleed air system,valve - failure,partial (cause)
- Forced landing, landing
- In flight collision with terrain/water, landing - flare/touchdown

## Analysis

THE ACFT CRASHED LANDED AFTER A PARTIAL LOSS OF POWER. DURING AN EXAM OF THE ENG, THE COMPRESSOR BLEED CONTROL VALVE WAS FOUND STUCK OPEN CAUSING AN IMPROPER FUEL/AIR MIXTURE.

## Aircraft

- Registration: [N1201W](https://openairdocs.org/aircraft/N1201W), registered now, S/N 7819, built 1966 (OpenAirDocs)
- Reported make and model: BELL 47G-5
- Registry model: [Bell 47G-5](https://openairdocs.org/model/bell-47g-5) (registry code 1181032) (OpenAirDocs)
- Registry engine: [Allison 250 series](https://openairdocs.org/engine/allison-250-series) (registry code 03014, turbo-prop) (OpenAirDocs)
- Category: Helicopter
- Serial number: 7819
- Engines: ALLISON 250-C20B 320 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Florida Plant Growth Regulator
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, April 25, 1984, 412 hours before
- Departed: JUPITER, FL

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: right; flight hours: 18,965 total, 1,254 in this make and model, 18,917 as pilot in command, 46 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 90° at 4 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point -0 °F

## 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 19840607024929A](https://openairdocs.org/incident/19840607024929A), Jun 7, 1984: Bell 47G5, Jupiter, FL, Substantial damage. Helicopter crashed during aerial application when partial loss of power occurred.

## Other investigations on N1201W (2)

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 MIA92LA014](https://openairdocs.org/ntsb/MIA92LA014), Oct 13, 1991: Bell 47G-5 (N1201W), La Belle, FL, substantial damage. Probable cause: THE PILOT IN COMMAND'S IMPROPER AFT APPLICATION OF CYCLIC CONTROL DURING AN AUTOROTATIVE LANDING TO AN OPEN FIELD, RESULTING IN THE MAIN ROTOR BLADES COLLIDING WITH THE TAIL BOOM. CONTRIBUTING TO THE…
- [NTSB DIA69F0110](https://openairdocs.org/ntsb/DIA69F0110), Nov 22, 1968: Bell 47G-5 (N1201W), Roanoke, VA, substantial damage

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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