LAX85LA400

NTSB accident investigation · Bell 47G-2 · Watsonville, CA · September 21, 1985

Accident · No injuriesLimited investigationFinal report
Date
September 21, 1985, 11:00 local (18:00 UTC)
Place
Watsonville, CA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N2874BBell 47G-2
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19850921047049A
Case key
24843

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

Airframe/component/system failure/malfunctionCruise
Rotor drive system,clutch assembly - undeterminedCause
Rotor drive system,freewheeling unit(other) - undeterminedCause
Loss of engine power(total) - mech failure/malfCruise
Forced landingDescent - emergency
Hard landingLanding - flare/touchdown
Emergency procedure - not possiblePilot in command
Flare - not possiblePilot in command

Analysis

During an ag flt, at abt 5 ft AGL, the plt heard a loud bang, the eng oversped, & all pwr to the rotor blades was lost. The plt attempted to immediately land in the underlying field, but had insufficient altitude/airspeed to autorotate. The acft touched down, bounced, & the main rotor blades flexed down & severed the tail boom. Exam of the clutch revealed that poor contact was being made between the shoes & drum. Exam of the free wheeling unit revealed it contained numerous rollers which would not lock. It is unknown which components's failure was primary.

Aircraft

Registration
N2874B
Reported as
Bell 47G-2
Category
Helicopter
Serial number
1987
Airframe hours
8,310
Engine
Lycoming VO-435-A1D, 200 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Helicair Ag, Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · September 13, 1985 · 21 hours before
Departed
Watsonville, CA
Destination
Watsonville, CA

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
66
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Multi-engine land, Multi-engine sea
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
19,236 total · 6,448 in this make and model · 19,054 as pilot in command · 213 in the last 90 days · 75 in the last 30 days · 6 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 3 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
61 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N2874B · 4

Matched to the same aircraft by N-number and date.