BFO90DOA01

NTSB accident investigation · Bell TH-1L · Galax, VA · August 1, 1990

Accident · Minor injuriesFinal report
Date
August 1, 1990, 19:15 local (23:15 UTC)
Place
Galax, VA
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N152RRBell TH-1L
Weather
Visual (VMC) · Day
Status
Completed · report March 12, 1993
Report
Approved by Office Director
FAA report
19900801033739A
Case key
11535

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

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Probable cause

The lost of engine power because of a compressor stall.

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(total) - nonmechanicalManeuvering - aerial application
Compressor assembly - stall
Forced landingDescent - emergency
Propeller/rotor contact to personLanding
Terrain condition - none suitable
Object - tree(s)

Analysis

The plt was aerial spraying at 100 AGL. The airspeed was 33 mph. When the engine stalled several times before total power loss occurred. The plt did an autorotation and landed in trees. The investigation did not reveal evidence of mechanical malfunction.

Aircraft

Registration
N152RR
Reported as
Bell TH-1L
Category
Helicopter
Serial number
157845
Airframe hours
7,739
Engine
Lycoming T53-L-13B, 1,400 horsepower, turbo shaft
Damage
Substantial damage
Flight
Business · Part 137
Operator
Ranger Helicopters Services
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · July 20, 1990 · 27 hours before
Departed
HLX · Hillsville, VA

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
48
Certificate
Commercial
Instrument ratings
Helicopter
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
3,698 total · 1,600 in this make and model · 3,000 as pilot in command · 144 in the last 90 days · 48 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 6 knots
Visibility
35 statute miles
Lowest ceiling
None
Temperature
82 °F, dew point 55 °F
Altimeter
30.00 inHg
Observed at
ROA, 68 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.