SEA99LA141

NTSB accident investigation · Bell 212 · Snoqualmie, WA · April 26, 1999

Accident · No injuriesLimited investigationFinal report
Date
April 26, 1999, 09:00 local (16:00 UTC)
Place
Snoqualmie, WA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N98WBell 212
Weather
Visual (VMC) · Day
Status
Completed · report November 2, 2000
Report
Approved by Office Director
FAA report
19990426040399A
Case key
47111

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

Clearance from an object was not maintained. A tree was a factor.

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.

In flight collision with objectHover
Object - tree(s)Factor
Clearance - not maintainedPilot in commandCause

Analysis

The pilot reported that he was moving sand, via an external load bucket, to a golf course sand trap which was located near a tree line. The pilot reported that the trees were about 50 to 60 feet in height, and that there was little room for movement. The pilot stated that at the time of the accident, the bucket was placed just short of the target area. As the pilot moved the cyclic to reposition the load, the tip plane of the main rotor blades dipped down and came in contact with a tree branch. The pilot stated that he did not realize that the collision had occurred until about 15 minutes later, when he noticed the broken tree branch. The pilot landed the helicopter without further incident to inspect for damage.

Factual narrative

On April 26, 1999, at 0900 Pacific daylight time, a Bell 212, N98W, registered to and operated by Weyerhaeuser Company, as a 14 CFR Part 133 external load operation, was substantially damaged when the main rotor blades collided with trees during a hover near Snoqualmie, Washington. Visual meteorological conditions prevailed at the time and a company visual flight rules flight plan was in effect. The commercial pilot, the sole occupant, was not injured. The flight had been performing external load operations in the local area throughout the morning.

In a written statement, the pilot reported that he was moving sand, via an external load bucket, to a golf course sand trap. The pilot stated that the sand trap was located near a tree line with little room for movement to place the bucket. The trees were about 50 to 60 feet in height. The pilot reported that at the time of the accident, the bucket was placed just short of the target area. As the pilot moved the cyclic to reposition the load, the tip plane of the main rotor blades dipped down and came in contact with a tree branch. The pilot stated that he did not realize that the collision had occurred until about 15 minutes later, when he noticed the broken tree branch. The pilot landed the helicopter without incident to inspect for damage. During the inspection, substantial damage was found to the main rotor blades.

Aircraft

Registration
N98W
Reported as
Bell 212
Category
Helicopter
Serial number
35100
Airframe hours
1,255
Engine
P&W PT63B, 1,600 horsepower, turbo shaft
Damage
Substantial damage
Flight
Other work use · Part 133
Registered owner
Weyerhaeuser Co.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
100 hour · March 21, 1999 · 55 hours before
Departed
Snoqualmie, WA
Flight plan
Company VFR

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
55
Certificate
Commercial
Instrument ratings
Helicopter
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Right
Flight hours
7,000 total · 3,000 in this make and model · 6,800 as pilot in command · 60 in the last 90 days · 30 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
40° at 10 knots, gusting 14
Visibility
10 statute miles
Lowest ceiling
None
Temperature
46 °F

FAA reports on this event · 1

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