ANC01LA131

NTSB accident investigation · Maule M-7-235B · Koliganek, AK · September 1, 2001

Accident · No injuriesLimited investigationFinal report
Date
September 1, 2001, 15:30 local (23:30 UTC)
Place
Koliganek, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N1007UMaule M-7-235B
Weather
Visual (VMC) · Day
Status
Completed · report February 20, 2002
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-ANC FSDO 03
FAA report
20010901036279A
Case key
53173

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 delay in aborting the takeoff. A factor in the accident was the pilot's diverted attention during the takeoff.

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 terrain/waterTakeoff - roll/run
Aborted takeoff - delayedPilot in commandCause
Terrain condition - dirt bank/rising embankment
Diverted attentionPilot in commandFactor

Analysis

The private certificated pilot was departing a remote lake in a float-equipped airplane. The lake is about 1,500 feet long, and is a location the pilot has operated from in the past. The pilot said he taxied into the middle of the lake several times to check the wind conditions before takeoff. The wind appeared to shift from the northwest, to the west, about 12 knots. The pilot said he initiated one takeoff run, but aborted the takeoff. His second takeoff included a step turn toward the south, during which the airplane seemed to lose a slight amount of speed. The pilot decided to lower the flaps to assist in getting off the water and he reached for the flap handle. The pilot said that as he reached for the handle, he realized he was reaching for the area of the airplane where the flap handle is normally installed in his other airplane, a Piper PA-18. He was distracted by not finding the flap handle in the accident airplane. The airplane became airborne, but collided with the bank of the lake. The airplane was then launched upward in a steep nose-up attitude, and the pilot said a stall was eminent. He lowered the nose of the airplane, but the airplane rolled to the left, and collided with the ground. The left float assembly, the left wing, and fuselage were damaged.

Factual narrative

On September 1, 2001, about 1530 Alaska daylight time, a float-equipped Maule M-7-235B airplane, N1007U, sustained substantial damage during takeoff from a remote lake, about 25 miles northeast of Koliganek, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country personal flight when the accident occurred. The airplane was operated by the pilot. The private certificated pilot, and the sole passenger, were not injured. Visual meteorological conditions prevailed.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on September 4, the pilot reported that he was departing Frost Lake, which is about 1,500 feet long, and is a location the pilot has operated from in the past. The pilot said he taxied into the middle of the lake several times to check the wind conditions before takeoff. The wind appeared to shift from the northwest, to the west, about 12 knots. The pilot said he initiated one takeoff run, but aborted the takeoff. His second takeoff included a step turn toward the south, during which the airplane seemed to lose a slight amount of speed. The pilot decided to lower the flaps to assist in getting off the water and he reached for the flap handle. The pilot said that as he reached for the handle, he realized he was reaching for the area of the airplane where the flap handle is normally installed in his other airplane, a Piper PA-18. He was distracted by not finding the flap handle in the accident airplane. The airplane became airborne, but collided with the bank of the lake. The airplane was then launched upward in a steep nose-up attitude, and the pilot said a stall was eminent. He lowered the nose of the airplane, but the airplane rolled to the left, and collided with the ground. The left float assembly, the left wing, and fuselage were damaged.

Aircraft

Registration
N1007U
Reported as
Maule M-7-235B
Category
Airplane
Serial number
23047C
Airframe hours
439
Engine
Lycoming O-540-B, 235 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Jerry C. Kallam
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 1, 2000 · 84 hours before
Departed
Koliganek, AK
Destination
PALJ · Port Alsworth, AK

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
45
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 3, Valid Medical--no waivers/lim.
Last flight review
April 26, 2001
Seat
Left
Flight hours
1,866 total · 439 in this make and model · 1,733 as pilot in command · 131 in the last 90 days · 65 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
270° at 12 knots
Visibility
30 statute miles
Lowest ceiling
None
Temperature
55 °F

FAA reports on this event · 1

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