SEA84LA022

NTSB accident investigation · Cessna 150K · Oregon City, OR · November 18, 1983

Accident · Minor injuriesLimited investigationFinal report
Date
November 18, 1983, 15:45 local (23:45 UTC)
Place
Oregon City, OR
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N6054GCessna 150K
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Case key
39852

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.

Loss of engine power(total) - nonmechanicalTakeoff - initial climb
Engine assembly,connecting rod - undertorquedCause
Maintenance,major repair - improperOther maintenance personnelCause
Engine assembly,connecting rod - failure,totalCause
Forced landingManeuvering - turn to landing area (emergency)
In flight collision with terrain/waterManeuvering - turn to landing area (emergency)

Analysis

The plt, who was an a & p mechanic, had just installed an eng that had been overhauled by someone else. He reported that the pretakeoff & run-up checks were normal. At aprx 250 to 300 ft AGL, during takeoff, the eng began to shake violently & lost power. The plt retarded the throttle & initiated a 180 deg turn to land in an open field. The left wing tip contacted the ground during the forced landing & the nose & right main gear collapsed. An exam & disassembly of the eng revealed that the #1 connecting rod had come lose & punctured the eng case. One of the bolts had failed & was necked down at the fracture. The nuts on the remaining rod caps were found to be finger tight or only slightly torqued. The required torque was 40 foot pounds. The eng had operated apprx .1 hr since major overhaul.

Aircraft

Registration
N6054G
Reported as
Cessna 150K
Category
Airplane
Serial number
15071554
Airframe hours
4,743
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 91
Registered owner
William L. Pepper
Airworthiness certificate
Standard, Normal
Last inspection
Unknown · November 18, 1983 · 0 hours before
Departed
OS2 · Oregon City, OR
Destination
OS2 · Oregon City, OR
Airport
OS2 · Oregon City Airpark, runway 25, 2,675 × 30 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
40
Certificates
Flight instructor, Commercial
Airplane ratings
Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
1,128 total · 357 in this make and model · 981 as pilot in command · 3 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 5 knots
Visibility
40 statute miles
Lowest ceiling
5,500 ft broken
Temperature
54 °F, dew point 43 °F
Altimeter
30.00 inHg
Observed at
PDX, 16 nm away

Other investigations on N6054G · 1

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