SEA85LA178

NTSB accident investigation · Bell 47G-3B-1 · Idaho City, ID · June 11, 1985

Accident · No injuriesLimited investigationFinal report
Date
June 11, 1985, 16:00 local (23:00 UTC)
Place
Idaho City, ID
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Enroute
Aircraft
N1333XBell 47G-3B-1
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19850611037589A
Case key
40210

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.

Loss of engine power(partial) - mech failure/malfCruise - normal
Exhaust system,external supercharger - failure,totalCause
Forced landingDescent - emergency
In flight collision with objectLanding - flare/touchdown
Terrain condition - none suitableFactor
Terrain condition - mountainous/hillyFactor
Object - tree(s)Factor

Analysis

While the student plt was on a x-country flt, the eng lost power after the supercharger failed. The plt stated that he was unable to maintain altitude & RPM; he subsequently made a forced landing in a heavily timbered, mountainous area.

Aircraft

Registration
N1333X
Reported as
Bell 47G-3B-1
Category
Helicopter
Serial number
6554
Airframe hours
3,995
Engine
Lycoming TVO-435-B1A, 270 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Registered owner
Jes Gandiaga
Airworthiness certificate
Standard, Utility
Last inspection
100 hour · July 24, 1985 · 93 hours before
Departed
MYC · Mccall, ID
Destination
U98 · Idaho City, ID
Airport
None

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
36
Certificate
Student
Medical
Class 3, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
93 total · 93 in this make and model · 50 as pilot in command · 50 in the last 90 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
50 statute miles
Lowest ceiling
None

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 N1333X · 2

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