ANC88LA150

NTSB accident investigation · Robinson R22HP · Mekoryuk, AK · June 17, 1988

Accident · No injuriesLimited investigationFinal report
Date
June 16, 1988, 16:00 local (Jun 17, 1988, 00:00 UTC)
Place
Mekoryuk, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Standing
Aircraft
N9076DRobinson R22HP
Weather
Visual (VMC) · Day
Status
Completed · report October 2, 1989
Report
Approved by Office Director
NTSB office
Alaska Regional Office
FAA report
19880616047089A
Case key
5091

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

On this page

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.

Miscellaneous/otherStanding - engine(s) operating
Terrain condition - rough/unevenFactor
Terrain condition - tundraFactor
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Procedures/directives - not followedPilot in commandCause
Aircraft unattended/engine(s) running - improperPilot in commandCause

Analysis

The pilot-in-command was herding reindeer for a native corporation and he and his passenger had to relieve themselves so they landed on the tundra and left the helicopter's engine and rotors operating. As they were exiting the helicopter, it shifted on the tundra and the tailboom was forced upward into the main rotor system causing substantial damage to the tailboom, tailrotor, and main rotor system.

Aircraft

Registration
N9076D
Reported as
Robinson R22HP
Category
Helicopter
Serial number
0255
Airframe hours
1,348
Engine
Lycoming O-320, 124 horsepower, reciprocating
Damage
Substantial damage
Flight
Other work use · Part 91
Operator
Donald C. Olson
Registered owner
William Munz
Airworthiness certificate
Standard, Normal
Departed
Nunivak Island, 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
35
Certificates
Flight instructor, Airline transport
Airplane ratings
Single-engine sea, Multi-engine sea, Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Left
Flight hours
7,000 total · 1,000 in this make and model · 6,500 as pilot in command · 200 in the last 90 days · 100 in the last 30 days · 4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
330° at 5 knots
Visibility
50 statute miles
Lowest ceiling
1,000 ft overcast
Temperature
50 °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.