# NTSB FTW90LA150: Cessna 152, N64984, New Roades, LA, August 1, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 1, 1990, 17:00 local (22:00 UTC)
- Place: New Roades, LA
- Coordinates: 30.689796, -91.450477 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=30.6898&lon=-91.4505&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 2, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 23165
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW90LA150
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/23165/pdf
- Page: https://openairdocs.org/ntsb/FTW90LA150

## Probable cause

UNKNOWN MECHANICAL MALFUNCTION RESULTING IN ENGINE OIL STARVATION. A CONTRIBUTING FACTOR WAS ROUGH TERRAIN IN WHICH THE FORCED LANDING WAS MADE.

## Sequence of events

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

- Loss of engine power, maneuvering
  - fluid,oil - loss,total (cause)
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
  - terrain condition - rough/uneven (contributing factor)
- Nose over, landing - flare/touchdown

## Analysis

DURING THE INSTRUCTIONAL FLIGHT, THE ENGINE SUFFERED A SUDDEN LOSS OF OIL PRESSURE, AND DURING THE FORCED LANDING, THE AIRPLANE NOSED OVER TO THE INVERTED POSITION. AS THE OIL PRESSURE WAS DROPPING, SO WAS THE ENGINE RPM. THERE WAS VERY LITTLE OIL IN THE SYSTEM AFTER THE ACCIDENT AND THE OIL HAD BEEN BLOWING OUT THE ENGINE BREATHER SYSTEM. THE OPERATOR SAID THAT AFTER THE WRECKAGE HAD BEEN RECOVERED, THEY HAD BLOCKED OFF THE ENGINE BREATHER SYSTEM AND THEN HAD PRESSURIZED IT TO 15 PSI, BUT COULD NOT FIND ANYTHING MECHANICAL THAT MIGHT HAVE PRESSURIZED THE CRANKCASE IN FLIGHT.

## Aircraft

- Registration: [N64984](https://openairdocs.org/deregistered/N64984-2013-04-30), registration cancelled 2013-04-30, S/N 15281511, built 1978 (OpenAirDocs)
- Reported make and model: CESSNA 152
- Registry model: [Cessna 152](https://openairdocs.org/model/cessna-152) (registry code 2071835) (OpenAirDocs)
- Registry engine: [Lycoming 0-235 series](https://openairdocs.org/engine/lycoming-0-235-series) (registry code 41505, 4 cycle) (OpenAirDocs)
- Category: Airplane
- Serial number: 15281511
- Airframe hours: 4900
- Engines: LYCOMING O-235-L2C 112 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Tillman, Michael
- Airworthiness certificate: Standard, Utility
- Last inspection: Annual, July 22, 1990, 30 hours before
- Departed: BTR, BATON ROUGE, LA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; commercial, flight instructor; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 380 total

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 90 °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 19900801030439A](https://openairdocs.org/incident/19900801030439A), Aug 1, 1990: Cessna 152, New Roads, LA, Substantial damage. Lost oil pressure. Flipped over on forced landing. Oil had blown out of oil breather. Cause of over pressure unknown

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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