ANC93IA026

NTSB incident investigation · Grumman G-21A · Akutan, AK · January 7, 1993

Incident · No injuriesIncident investigationFinal report
Date
January 7, 1993, 15:30 local (19:30 UTC)
Place
Akutan, AK
Injuries
8 uninjured
Damage
Minor damage
Phase of flight
Landing
Aircraft
N22932Grumman G-21A
Weather
Visual (VMC) · Day
Status
Completed · report December 3, 1993
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19930107000249I
Case key
5840

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

On this page

Probable cause

The NTSB’s determination of the probable cause, and any contributing factors.

The incident was caused by the pilots improper compensation for the winds. Factors were the microburst, the rough water, and the pilot's inadequate evaluation of the weather conditions.

Analysis

The pilot stated that just after touching down on the water, he encountered a microburst. He estimated that the wind speed suddenly changed from about 15 to 20 knots to 40 to 50 knots. The left wing float hit the water and was torn off. Because of the strong winds and rough water he was unable to get airborne or to turn the airplane. He kept the airplane headed into the wind and beached the airplane on the opposite side of the bay. The pilot also said that suitable weather conditions had been reported for the landing area about one half hour earlier.

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 control - on ground/waterLanding - roll
Weather condition - microburst/dryFactor
Weather evaluation - inadequatePilot in commandFactor
Compensation for wind conditions - improperPilot in commandCause
Dragged wing,rotor,pod,float or tail/skidLanding - roll
Airport facilities,runway/landing area condition - water,roughFactor

Aircraft

Registration
N22932
Reported as
Grumman G-21A
Category
Airplane
Serial number
B-139
Airframe hours
12,054
Engine
P&W R-985, 450 horsepower, reciprocating
Damage
Minor damage
Flight
Part 135
Operator
Peninsula Airways, Inc.
Registered owner
Peninsula Airways, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · January 7, 1993 · 1 hours before
Departed
DUT · Unalaska, 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
28
Certificate
Airline transport
Airplane ratings
Single-engine land, Multi-engine sea, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
7,076 total · 235 in this make and model · 6,953 as pilot in command · 131 in the last 90 days · 44 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
120° at 15 knots, gusting 30
Visibility
5 statute miles
Lowest ceiling
800 ft broken
Temperature
36 °F

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 N22932 · 3

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