ANC21LA077

NTSB accident investigation · Piper PA-12 · Nikolai, AK · August 28, 2021

Accident · No injuriesClass 4 · LimitedFinal report
Date
August 27, 2021, 19:30 local (Aug 28, 2021, 03:30 UTC)
Place
Nikolai, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N2579MPiper PA-12
Defining event
Approach-VFR go-around: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Alaska Regional Office
Parties
FAA, Manager, Anchorage Flight Standards District Office
FAA report
20210827013999A
Case key
103778

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 loss of control on go-around in gusting crosswind conditions. Contributing to accident was the pilot’s decision to attempt to land at a short off-airport landing site with a malfunctioning airspeed indicator.

Findings · 4

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.

Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotPiper PA-12: 51 casesAll aircraft: 9,295 casesProbable cause
Performance/control parameters: airspeedAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-12: 7 casesAll aircraft: 1,681 casesProbable cause
Performance/control parameters: angle of attackAircraft › Aircraft oper/perf/capability · Not attained/maintainedPiper PA-12: 7 casesAll aircraft: 990 casesProbable cause

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 pilot of the tailwheel-equipped airplane reported that he was landing at a short, unimproved, off-airport landing site with a malfunctioning airspeed indicator. After touchdown, he immediately retracted the flaps when a strong gusting crosswind lifted the left wing, and the right main tire simultaneously impacted a large rock. The airplane bounced into the air, and he applied throttle to arrest the airplanes descent and touched down again. Realizing he was beyond the halfway point of the landing surface; he applied full throttle and initiated a go-around. The airplane failed to gain altitude, stalled, impacted the ground and nosed-over sustaining substantial damage to the left wing, vertical stabilizer and rudder. A postaccident examination revealed no anomalies with the airspeed indicator instrument; however, a blockage was present in the pitot/static system. The pilot stated that the accident may have been prevented if he had returned to his departure airstrip when he noticed the malfunctioning airspeed indicator rather than continuing and attempting to land at the short, unimproved, off-airport landing site.

Aircraft

Registration
N2579M
Reported as
Piper PA-12
Category
Airplane
Serial number
12-946
Built
1946
Airframe hours
5,972.1
Engine
Lycoming O-320, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
None; Standard, Normal
Last inspection
Annual · December 29, 2020
Destination
Same as departure
Airport
PVT · Pvt, runway PVT, 450 × 15 ft, gravel
Equipment
None

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
57
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
June 29, 2021
Seat
Front
Flight hours
27,995 total · 437 in this make and model · 2,787 as pilot in command · 75 in the last 90 days · 28 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 5 knots
Visibility
10 statute miles
Lowest ceiling
6,500 ft overcast
Temperature
45 °F, dew point 30 °F
Altimeter
29.99 inHg
Observed at
PAFS, 52 nm away
METAR
PAFS 280301Z AUTO 30005KT 10SM FEW049 OVC065 07/M01 A2999 RMK AO2 SLP163 T00721006 51015

Docket · 3

The files NTSB released with the investigation on April 18, 2022, on NTSB’s docket system: statements, records, photos and specialists’ reports. 4.1 MB 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.