# NTSB SEA84LA022: Cessna 150K, N6054G, Oregon City, OR, November 18, 1983

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: November 18, 1983, 15:45 local (23:45 UTC)
- Place: Oregon City, OR
- Coordinates: 45.320701, -122.520881 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=45.3207&lon=-122.5209&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 39852
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA84LA022
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/39852/pdf
- Page: https://openairdocs.org/ntsb/SEA84LA022

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Loss of engine power(total) - nonmechanical, takeoff - initial climb
  - engine assembly,connecting rod - undertorqued (cause)
  - maintenance,major repair - improper, other maintenance personnel (cause)
  - engine assembly,connecting rod - failure,total (cause)
- Forced landing, maneuvering - turn to landing area (emergency)
- In flight collision with terrain/water, maneuvering - 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](https://openairdocs.org/deregistered/N6054G-2013-04-25), registration cancelled 2013-04-25, S/N 15071554, built 1969 (OpenAirDocs)
- Reported make and model: CESSNA 150K
- Registry model: [Cessna 150K](https://openairdocs.org/model/cessna-150k) (registry code 2071822) (OpenAirDocs)
- Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 15071554
- Airframe hours: 4743
- Engines: 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

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; 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)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB OAK75DVM02](https://openairdocs.org/ntsb/OAK75DVM02), Jul 16, 1974: Cessna 150 (N6054G), Hlf Moon By, CA, substantial damage

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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