# NTSB MKC87LA112: Cessna 150G, N3767J, Forest City, IA, May 19, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 18, 1987, 19:00 local (May 19, 1987, 00:00 UTC)
- Place: Forest City, IA
- Coordinates: 43.249916, -93.629241 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=43.2499&lon=-93.6292&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report March 10, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 34389
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC87LA112
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34389/pdf
- Page: https://openairdocs.org/ntsb/MKC87LA112

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise
  - engine instruments,oil pressure gage - no pressure (contributing factor)
  - lubricating system,oil line - separation (cause)
- Forced landing, cruise
- Nose over, landing - roll
  - terrain condition - soft (cause)

## Analysis

AFTER REACHING A CRUISE ALT OF 1000 FT AGL, THE PLT NOTICED A LACK OF OIL PRESSURE. HE ELECTED TO MAKE A PRECAUTIONARY LANDING IN AN UNPLOWED SOFT FIELD. THE PLT THEN REDUCED PWR TO IDLE AND SET UP FOR THE LANDING. DURING THE LANDING ROLL THE ACFT NOSED OVER. POST ACCIDENT INSPECTION REVEALED A BREAK IN THE OIL LINE.

## Aircraft

- Registration: [N3767J](https://openairdocs.org/aircraft/N3767J), registered now, S/N 15065067, built 1966 (OpenAirDocs)
- Reported make and model: CESSNA 150G
- Registry model: [Cessna 150G](https://openairdocs.org/model/cessna-150g) (registry code 2071816) (OpenAirDocs)
- Registry engine: [Continental 0-200 series](https://openairdocs.org/engine/continental-0-200-series) (registry code 17020, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 15065067
- Airframe hours: 4840
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: William R.Yocom
- Registered owner: William R. Yocom
- Airworthiness certificate: Standard, Utility
- Last inspection: Annual, March 12, 1987, 12 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 51; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 117 total, 117 in this make and model, 94 as pilot in command, 19 in the last 90 days, 8 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 15 knots
- Lowest ceiling: none
- Temperature: 81 °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 (OpenAirDocs).

- [Accident 19870518021189A](https://openairdocs.org/incident/19870518021189A), May 18, 1987: Cessna 150G, Forest City, IA, Substantial damage. The aircraft flipped over during a precautionary landing. Engine lost oil pressure due to a broken oil line.

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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