ANC09CA087

NTSB accident investigation · Piper PA-12 · Dillingham, AK · August 23, 2009

Accident · No injuriesData collectionFinal report
Date
August 22, 2009, 16:00 local (Aug 23, 2009, 00:00 UTC)
Place
Dillingham, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N92770Piper PA-12
Defining event
Landing-landing roll: Nose over/nose down
Weather
Visual (VMC) · Day
Status
Completed · report December 29, 2009
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA - FSDO3
FAA report
20090822048569A
Case key
74586

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 decision to land on unsuitable soft, wet terrain, which resulted in a nose-over on landing.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

TerrainEnvironmental issues › Physical environment · Decision related to conditionPiper PA-12: 2 casesAll aircraft: 267 casesProbable cause
Runway/land/takeoff/taxi surface: soft surfaceEnvironmental issues › Physical environment · Contributed to outcomePiper PA-12: 3 casesAll aircraft: 264 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The private pilot reported he was landing a tailwheel-equipped airplane at an off-airport, tundra-covered site, at the conclusion of a Title 14, Code of Federal Regulations Part 91 personal flight. The pilot reported that during the landing roll the main wheels sunk into the soft, wet terrain, and the airplane nosed over, which resulted in substantial damage to the left wing lift strut. He reported that there were no preaccident mechanical problems with the airplane.

Factual narrative

The private pilot reported that he was landing a tailwheel-equipped airplane at an off-airport, tundra-covered site, at the conclusion of a Title 14, Code of Federal Regulations Part 91 personal flight. The pilot reported that during the landing roll the main wheels sunk into the soft, wet terrain, and the airplane nosed over, which resulted in substantial damage to the left wing lift strut. He reported that there were no preaccident mechanical problems with the airplane.

Aircraft

Registration
N92770
Reported as
Piper PA-12
Category
Airplane
Serial number
12-215
Airframe hours
404
Engine
Lycoming O-235 SERIES, 115 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Bush Jonathan
Registered owner
Bush Jonathan
Airworthiness certificate
Standard, Normal
Last inspection
Annual · December 15, 2008 · 251 hours before
Departed
DLG · Dillingham, AK
Destination
Dillingham, 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
29
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Flight hours
392 total · 392 in this make and model · 392 as pilot in command · 85 in the last 90 days · 33 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
225° at 7 knots, gusting 11
Visibility
10 statute miles
Lowest ceiling
4,500 ft overcast
Temperature
52 °F, dew point 50 °F
Altimeter
29.36 inHg

Docket · 1

The files NTSB released with the investigation on October 25, 2009, on NTSB’s docket system: statements, records, photos and specialists’ reports. 849 KB in all.

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 N92770 · 1

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