ERA21LA131

NTSB accident investigation · Piper PA-18 · Lake Placid, FL · February 10, 2021

Accident · Minor injuriesClass 4 · LimitedFinal report
Date
February 10, 2021, 18:30 local (23:30 UTC)
Place
Lake Placid, FL
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Approach
Aircraft
N8183CPiper PA-18
Defining event
Approach-VFR pattern final: Flight control sys malf/fail
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 4 - Basic report with no Prelim publish
NTSB office
Eastern Region Aviation
Parties
FAA FSDO
FAA report
20210210016159A
Case key
102640

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 failure to ensure that the aft seat cushion was adequately secured, which resulted in its movement, subsequent interference with the flight controls, and a hard landing.

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.

Flight control system: control column sectionAircraft › Aircraft systems · Not specifiedPiper PA-18: 3 casesAll aircraft: 21 casesProbable cause
Inspection: preflight inspectionPersonnel issues › Task performance · PilotPiper PA-18: 1 caseAll aircraft: 551 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 tandem seat-equipped airplane was high while on final approach to land, so he induced a slip to lose altitude before landing. Due to the forward pitch of the airplane during the slip, the aft seat cushion slid forward and lodged between the seat frame and control stick. The pilot the applied back pressure on the control stick to flare the airplane and slow the descent, but the control stick was blocked by the aft seat cushion. The airplane continued to descend, which resulted in a hard landing and substantial damage to the fuselage and both wings.

Aircraft

Registration
N8183C
Reported as
Piper PA-18
Category
Airplane
Serial number
18-3642
Built
1954
Airframe hours
4,111
Engine
Lycoming 0-320 SERIES, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Destination
Same as departure
Airport
09FA · Placid lakes, runway 36, 2,723 × 55 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
31
Injuries
Minor
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Without waivers/limitations
Last flight review
January 7, 2021
Seat
Front
Restraint
4-point
Flight hours
96 total · 28 in this make and model · 39 as pilot in command · 28 in the last 90 days · 10 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
130° at 4 knots
Visibility
10 statute miles
Temperature
77 °F, dew point 63 °F
Altimeter
30.09 inHg
Observed at
SEF, 13 nm away
METAR
KSEF 102355Z AUTO 13004KT 10SM CLR 25/17 A3009 RMK AO2 T02450175 10293 20245 402930176

Docket · 4

The files NTSB released with the investigation on July 15, 2021, on NTSB’s docket system: statements, records, photos and specialists’ reports. 5.7 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.