LAX86LA203

NTSB accident investigation · Bell 47G-2 · Palmdale, CA · May 2, 1986

Accident · No injuriesLimited investigationFinal report
Date
May 1, 1986, 19:10 local (May 2, 1986, 02:10 UTC)
Place
Palmdale, CA
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Emergency descent
Aircraft
N4239JBell 47G-2
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
FAA report
19860501015109A
Case key
25146

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.

Forced landingDescent - emergency
Fluid,fuel - low levelFactor
Precautionary landing - intentionalPilot in commandFactor
Flight/nav instruments,compass - inoperativeFactor
Fuel supply - inadequatePilot in commandFactor
Fuel consumption calculations - improperPilot in commandCause
Became lost/disoriented - inadvertentPilot in commandFactor
Hard landingLanding - flare/touchdown
Flare - improperPilot in commandCause
Design stress limits of aircraft - exceededPilot in commandFactor

Analysis

The helicopter landed hard in the desert while on a VFR personal flt. The plt indicated that he just departed a mountian area for refueling. He also indicated he was disoriented and the compass was inoperable. He decided to land and check the fuel quantity. He stated he misjudged the landing, the tail hit the desert floor and the main rotor struck and severed the tail boom. Aprx 1 quart of fuel was drained from the entire fuel system. According to the manufacturers operators manual for the bell 47G, the fuel capacity is 43 gallons total with 41 gallons usable.

Aircraft

Registration
N4239J
Reported as
Bell 47G-2
Category
Helicopter
Serial number
1
Airframe hours
12,211
Engine
Franklin 6VS-335-A, 225 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Riverside Air Service
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · April 17, 1986 · 10 hours before
Departed
PMD · Palmdale, CA
Airport
PMD · Palmdale

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
25
Certificates
Commercial, Private, Flight instructor
Airplane ratings
Single-engine land
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
1,943 total · 1,538 in this make and model · 1,870 as pilot in command · 90 in the last 90 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 11 knots
Visibility
35 statute miles
Lowest ceiling
None
Altimeter
30.00 inHg
Observed at
PMD, 8 nm away

FAA reports on this event · 1

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