# NTSB LAX86FVD07: Bell 47G-2, N6727D, Stockton, CA, March 6, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: March 6, 1986, 13:00 local (21:00 UTC)
- Place: Stockton, CA
- Coordinates: 37.899841, -121.400848 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.8998&lon=-121.4008&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): 24973
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX86FVD07
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/24973/pdf
- Page: https://openairdocs.org/ntsb/LAX86FVD07

## Sequence of events

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

- Dragged wing,rotor,pod,float or tail/skid, maneuvering - aerial application
  - airspeed - misjudged, pilot in command (cause)
  - low pass - performed, pilot in command (cause)
  - terrain condition - soft (contributing factor)
  - terrain condition - wet (contributing factor)
- Loss of control - in flight, descent - uncontrolled
- In flight collision with terrain/water, descent - uncontrolled
- Roll over, descent - uncontrolled

## Analysis

THE PILOT WAS MAKING A SLOW PASS AND DRAGGED ONE SPRAY BOOM ON THE GROUND. INSUFFICIENT AIRSPEED RESULTED IN LOSS OF CONTROL. HELICOPTER CRASHED.

## Aircraft

- Registration: [N6727D](https://openairdocs.org/deregistered/N6727D-2007-06-08), registration cancelled 2007-06-08, S/N 2226, built 1958 (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: 2226
- Airframe hours: 8075
- Engines: LYCOMING VO-435-A1F 200 horsepower reciprocating
- Damage: Destroyed
- Flight: Aerial application, Part 137
- Registered owner: Valley Helicopters
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, February 24, 1986, 3 hours before
- Departed: STOCKTON, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 39; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 700 total, 500 in this make and model, 700 as pilot in command, 85 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 6 knots
- Visibility: 10 statute miles
- Lowest ceiling: 20,000 ft broken
- Temperature: 72 °F, dew point 52 °F
- Altimeter: 30.00 inHg

## 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 19860306005749A](https://openairdocs.org/incident/19860306005749A), Mar 6, 1986: Bell 47G2, Stockton, CA, Destroyed. Spray boom struck the ground and broke loose while passing under powerlines. Skid dug in, aircraft rolled over.

## Other investigations on N6727D (3)

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 OAK77DVM12](https://openairdocs.org/ntsb/OAK77DVM12), Apr 6, 1977: Bell 47G2 (N6727D), King City, CA, destroyed
- [NTSB OAK73DVM21](https://openairdocs.org/ntsb/OAK73DVM21), Dec 15, 1972: Bell 47G-2 (N6727D), Salinas, CA, substantial damage
- [NTSB UNK65X0170](https://openairdocs.org/ntsb/UNK65X0170), Oct 6, 1964: Bell 47G2 (N6727D), Monterey, CA, 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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