NYC90LA123

NTSB accident investigation · Cessna 401 · Plymouth, MA · May 31, 1990

Accident · No injuriesLimited investigationFinal report
Date
May 31, 1990, 11:15 local (15:15 UTC)
Place
Plymouth, MA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N401FCCessna 401
Weather
Visual (VMC) · Day
Status
Completed · report November 23, 1992
Report
Approved by Office Director
FAA report
19900531018239A
Case key
36656

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

Improper maintenance and inspection by maintenance personnel of the left gear torque link attachment.

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.

Gear collapsedLanding - roll
Landing gear,normal retraction/extension assembly - separationCause
Maintenance,100-hour inspection - improperOther maintenance personnelCause
Maintenance,inspection - improperOther maintenance personnelCause
Loss of control - on ground/waterLanding - roll

Analysis

The airplane landed normally. The pilot felt a vibration and the airplane pulled left during rollout. He heard a loud snapping sound and the left side of the airplane dropped to the runway. The airplane pulled severely left and departed the runway and stopped in the grass about 30 feet from the runway. Examination of the landing gear revealed a nut, washer, and cotter pin were missing from the left gear torque-link attachment two hours hobbs time after the accident occurred. Work had been performed on the left gear torque link attachment during the last inspection.

Aircraft

Registration
N401FC
Reported as
Cessna 401
Category
Airplane
Serial number
401-0211
Engine
Continental TSIO-520-E, 300 horsepower, reciprocating
Damage
Substantial damage
Flight
Business · Part 91
Operator
Plymouth Air Sales
Airport
PYM · Plymouth, runway 24, 3,500 × 75 ft, asphalt

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
50
Certificate
Commercial
Airplane ratings
Single-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Flight hours
11,400 total · 400 in this make and model · 11,300 as pilot in command · 50 in the last 90 days · 10 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
225° at 15 knots
Visibility
20 statute miles
Lowest ceiling
None
Temperature
-0 °F, dew point -0 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.