ANC82DA043

NTSB accident investigation · Arctic S1B2 · Near Big Lake, AK · May 29, 1982

Accident · No injuriesFinal report
Date
May 29, 1982, 11:30 local (19:30 UTC)
Place
Near Big Lake, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N65ATArctic S1B2
Weather
Visual (VMC) · Day
Status
Completed · report May 29, 1983
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19820529019889A
Case key
71847

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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Analysis

The purpose of the flight was to provide dual instruction to a rated single-engine-land pilot in basic float plane training. After practicing a number of landings, the instructor (ip) simulated an engine-out by reducing the power to 1000-1200 RPM. At this time the aircraft was on a close-in downwind leg beside the lake. The ip realized the student would not be able to land on the lake without adding power. He told the student to add power and then took the controls. The aircraft continued to sink and the floats struck the tops of several trees while on a short base leg. The ip visually checked the floats and saw no damage, but did notice the plane was carrying some branches. He made a controlled landing in the water and then headed for the shore. By the time they got to the shore, the damaged float rigging allowed the plane to lean to the right with the right wing dragging in the water.

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.

UndershootApproach - vfr pattern - base leg/base to final
Distance - misjudgedDual studentCause
Altitude - misjudgedDual studentCause
Supervision - improperPilot in command(cfi)Cause
In flight collision with objectApproach - vfr pattern - base leg/base to final
Object - tree(s)Factor

Aircraft

Registration
N65AT
Reported as
Arctic S1B2
Category
Airplane
Serial number
1016
Airframe hours
107
Engine
Lycoming O-320-B2B, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Instructional · Part 91
Operator
Elmendorf Aero Club
Registered owner
Elmendorf Aero Club
Departed
Anchorage, AK
Destination
Anchorage, AK
Flight plan
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
33
Certificates
Commercial, Flight instructor
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Flight hours
967 total · 9 in this make and model · 725 as pilot in command · 93 in the last 90 days · 26 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
330° at 7 knots
Visibility
30 statute miles
Lowest ceiling
3,500 ft broken
Temperature
113 °F
Altimeter
30.00 inHg

FAA reports on this event · 1

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