MIA88LA235

NTSB accident investigation · Cessna 172M · Plymouth, FL · July 23, 1988

Accident · No injuriesLimited investigationFinal report
Date
July 23, 1988, 14:15 local (18:15 UTC)
Place
Plymouth, FL
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N12840Cessna 172M
Weather
Visual (VMC) · Day
Status
Completed · report September 11, 1989
Report
Approved by Office Director
FAA report
19880723027629A
Case key
32219

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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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.

Main gear collapsedLanding - roll
Landing gear,main gear attachment - shearedCause
Landing gear,main gear attachment - previous damageCause
Landing gear,main gear attachment - looseFactor

Analysis

After a normal lndg, during the lndg roll at aprx 50-55 mph, the acft rolled through a 1-2' deep puddle of water. The acft slowed & at aprx 35 mph, the rt main lndg gear slowly began rotating aft. The acft came to rest supported by the rt horizontal stabilizer & the nose & left main lndg gear. Examination of the failed gear revealed the attach bolt for the gear spring assy failed, allowing the gear to rotate aft. Examination of the bolt revealed it failed due to excess shear loads placed on it during torsional loading of the upper end of the lndg gear tube. The bolt also showed evidence of fretting. Hardness tests performed revealed the bolt was within specifications.

Aircraft

Registration
N12840
Reported as
Cessna 172M
Category
Airplane
Serial number
17262304
Airframe hours
2,800
Engine
Lycoming O-320-E2D, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Larson, David A.
Registered owner
Darson, David A
Airworthiness certificate
Standard, Utility; Standard, Normal
Last inspection
Annual · June 11, 1988 · 15 hours before
Airport
X04 · Orlando County, runway 15, 3,000 × 30 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
31
Certificate
Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
740 total · 500 in this make and model · 728 as pilot in command · 38 in the last 90 days · 14 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
360° at 8 knots
Visibility
3 statute miles
Lowest ceiling
15,000 ft broken
Altimeter
30.00 inHg
Observed at
ORL, 17 nm away

FAA reports on this event · 1

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