ANC01LA062

NTSB accident investigation · Noorduyn UC-64A · Seward, AK · June 4, 2001

Accident · No injuriesLimited investigationFinal report
Date
June 3, 2001, 19:00 local (Jun 4, 2001, 03:00 UTC)
Place
Seward, AK
Injuries
6 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N225BLNoorduyn UC-64A
Weather
Visual (VMC) · Day
Status
Completed · report May 21, 2002
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration
FAA report
20010603039719A
Case key
52407

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 pilot's inadvertent stall of the airplane during takeoff. Factors associated with the accident were the pilot's inadequate weather evaluation, his inadequate compensation for wind conditions, and turbulence.

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 encounter with weatherTakeoff - initial climb
Weather evaluation - inadequatePilot in commandFactor
Weather condition - turbulenceFactor
Loss of control - in flightTakeoff - initial climb
Compensation for wind conditions - inadequatePilot in commandFactor
Stall - inadvertentPilot in commandCause
In flight collision with terrain/waterDescent - uncontrolled
Terrain condition - water

Analysis

The commerical pilot reported to the NTSB that prior to departure he briefed the passengers of the anticipated turbulence. He said that he taxied the float-equipped airplane to the farthest point on the lake that would allow the maximum amount of takeoff run. He said that just after takeoff, about 150 feet above the water, a very strong gust of wind pushed the nose of the airplane to the left. He applied full right rudder in an attempt to regain control, but the nose of the airplane continued to the left, and the left wing stalled. The pilot said: "The airplane just stopped flying, and we just fell from about 100 feet." As the airplane's floats struck the surface of the lake, the left side of the fuselage buckled, and the left wing struck the water.

Factual narrative

On June 3, 2001, about 1900 Alaska daylight time, a float-equipped Noorduyn Norseman UC-64A airplane, N225BL, sustained substantial damage during takeoff from a remote tidal lake, about 28 miles southeast of Seward, Alaska. The airplane was being operated as a visual flight rules (VFR) on-demand passenger flight under Title 14, CFR Part 135, when the accident occurred. The airplane was registered to the pilot, and operated by Bear Lake Air, Inc., Seward. The certificated commercial pilot, and the five passengers aboard, were not injured. Visual meteorological conditions prevailed, and VFR company flight following procedures were in effect. The flight departed Bear Lake, in Seward, about 1730, en route to the accident lake.

During a telephone conversation with the National Transportation Safety Board investigator-in-charge on June 4, the pilot reported that during the flight from Bear Lake, strong winds and turbulence were encountered. He added that after landing at the accident lake he taxied to shore, loaded his passengers, and briefed the passengers of the anticipated turbulence. He added that he taxied the airplane to the farthest point on the lake that would allow the maximum amount of takeoff run. He said that just after takeoff, about 150 feet above the water, a very strong gust of wind pushed the nose of the airplane to the left. He applied full right rudder in an attempt to regain control, but the nose of the airplane continued to the left, and the left wing stalled. The pilot said: "The airplane just stopped flying, and we just fell from about 100 feet." As the airplane's floats struck the surface of the lake, the left side of the fuselage buckled, and the left wing struck the water. The airplane sustained substantial damage to the fuselage, and minor damage to the left wing.

Aircraft

Registration
N225BL
Reported as
Noorduyn UC-64A
Category
Airplane
Serial number
542
Airframe hours
15,336.9
Engine
P&W R1340-AN1, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 135
Operator
Manufactured Homes Of Alaska Inc, doing business as Bear Lake Air
Registered owner
Dennis T. Perry
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 22, 2000 · 17.1 hours before
Departed
SWD · Seward, AK
Destination
SWD · Seward, AK
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
50
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
5,200 total · 350 in this make and model · 5,100 as pilot in command

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 12 knots, gusting 18
Visibility
10 statute miles
Lowest ceiling
6,500 ft overcast
Temperature
50 °F
Altimeter
29.79 inHg

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 N225BL · 1

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