ANC04LA065

NTSB accident investigation · Piper PA-18 · McGrath, AK · June 16, 2004

Accident · No injuriesLimited investigationFinal report
Date
June 16, 2004, 10:00 local (18:00 UTC)
Place
McGrath, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N18ZFPiper PA-18
Weather
Visual (VMC) · Day
Status
Completed · report December 3, 2004
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-ANC FSDO 03
FAA report
20040616011489A
Case key
59447

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

On this page

Probable cause

The pilot's selection of unsuitable terrain for landing, which resulted in the airplane nosing over during the landing roll. A factor contributing to the accident was the presence of soft tundra.

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.

On ground/water encounter with terrain/waterLanding - roll
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Terrain condition - softFactor
Terrain condition - tundra
Loss of control - on ground/waterLanding - roll
Nose overLanding - roll

Analysis

The commercial certificated pilot was landing in an open area of tundra next to a creek. As the airplane touched down, the pilot said he realized that the tundra surface was soft and wet. During the landing roll, the main landing gear tires dug into the soft terrain, and the airplane nosed over. The pilot, who is a certificated aviation mechanic, reported that the airplane received damage to the left wing lift strut, the rudder, and the vertical stabilizer.

Factual narrative

On June 16, 2004, about 1000 Alaska daylight time, a tundra tire-equipped Piper PA-18 airplane, N18ZF, sustained substantial damage when it encountered soft terrain and nosed over during the landing roll in a remote area, about 24 miles north-northwest of McGrath, Alaska. The airplane was being operated as a visual flight rules (VFR) local area personal flight under Title 14, CFR Part 91, when the accident occurred. The airplane was operated by the pilot. The commercial certificated pilot and the sole passenger were not injured. Visual meteorological conditions prevailed. The flight originated at the McGrath Airport about 0930. No flight plan was filed, nor was one required.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on June 16, the pilot reported that he was landing in an open area of tundra next to a creek. As the airplane touched down, the pilot said he realized that the tundra surface was soft and wet. During the landing roll, the main landing gear tires dug into the soft terrain, and the airplane nosed over. The pilot, who is a certificated aviation mechanic, reported that the airplane received damage to the left wing lift strut, the rudder, and the vertical stabilizer.

Aircraft

Registration
N18ZF
Reported as
Piper PA-18
Category
Airplane
Serial number
18-1159
Airframe hours
6,731
Engine
Lycoming O-360-A2A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Merrill E. Danna
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · April 28, 2004 · 56 hours before
Departed
PAMC · McGrath, 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
38
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land, Single-engine sea
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Last flight review
May 18, 2004
Seat
Front
Flight hours
10,000 total

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 5 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.