ANC11CA025

NTSB accident investigation · Piper PA-12 · Delta Junction, AK · April 10, 2011

Accident · No injuriesData collectionFinal report
Date
April 10, 2011, 15:45 local (23:45 UTC)
Place
Delta Junction, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N3613MPiper PA-12
Defining event
Landing-flare/touchdown: Landing area undershoot
Weather
Visual (VMC) · Day
Status
Completed · report July 12, 2011
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA FSDO-01
FAA report
20110410007439A
Case key
78829

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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Probable cause

The pilot's misjudged altitude while landing in bright sunlight on an airstrip surrounded by snow, resulting in an undershoot and a nose over.

Findings · 2

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.

Personnel issuesPersonnel issues › Task performance · PilotPiper PA-12: 1 caseAll aircraft: 137 casesProbable cause
Light condition: bright lightEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomePiper PA-12: 1 caseAll aircraft: 28 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

According to the pilot, he was practicing takeoffs and landings on a grass airstrip. He said snow had been removed from the center of the grass airstrip, but not the surrounding area. During his approach to land, bright sunlight reflected off the snow that made him lose his depth perception. The airplane touched down short of the runway, nosing over in deep snow. The pilot reported no preimpact mechanical problems with the airplane. The airplane received substantial damage to both wings.

Factual narrative

The pilot was practicing takeoffs and landings on a grass airstrip. He said snow had been removed from the center of the grass airstrip, but not the surrounding area. During his approach to land, he said bright sunlight reflected off the snow made him lose his depth perception, and the airplane touched down short of the runway, nosing over in deep snow. The pilot reported no preimpact mechanical problems with the airplane. The airplane received substantial damage to both wings.

Aircraft

Registration
N3613M
Reported as
Piper PA-12
Category
Airplane
Serial number
12-2459
Airframe hours
5,396
Engine
Lycoming O-235 SERIES, 115 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Hall Gary L
Registered owner
Hall Gary L
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 14, 2010
Departed
AK09 · Delta Junction, AK
Destination
AK09 · Delta Junction, AK
Airport
AK09 · Windsong, runway 15, 2,400 × 75 ft, grass/turf

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
61
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, With waivers/limitations
Last flight review
April 26, 2010
Seat
Front
Flight hours
3,388 total · 2,146 in this make and model · 3,328 as pilot in command · 4 in the last 90 days · 4 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
39 °F
Altimeter
30.11 inHg

Docket · 1

The files NTSB released with the investigation on April 28, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 149 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 N3613M · 3

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