# NTSB CHI90LA245: Cessna 172, N4347R, Farmington, MO, August 25, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 25, 1990, 10:00 local (15:00 UTC)
- Place: Farmington, MO
- Coordinates: 37.779464, -90.420539 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.7795&lon=-90.4205&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 28, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 14760
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI90LA245
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14760/pdf
- Page: https://openairdocs.org/ntsb/CHI90LA245

## Probable cause

REMEDIAL ACTION WAS NOT ATTAINED BY THE CFI. CONTRIBUTING TO THE ACCIDENT WAS INADEQUATE AIRSPEED AND PORPOISE ENCOUNTERED BY THE DUAL STUDENT PILOT.

## Sequence of events

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

- Hard landing, landing
  - airspeed - inadequate, dual student (contributing factor)
  - porpoise/pilot-induced oscillation - encountered, dual student (contributing factor)
  - remedial action - not attained, pilot in command(cfi) (cause)
- Nose gear collapsed, landing

## Analysis

WHILE PRACTICING LDGS DURING A DUAL INSTRUCTIONAL FLIGHT, THE STUDENT PLT ALLOWED THE AIRSPEED TO DECAY RESULTING IN A HARD LDG AND A REBOUND INTO THE AIR. THE STUDENT ATTEMPTED TO CORRECT THE PITCH ATTITUDE, BUT WAS OUT OF PHASE WITH THE OSCILLATIONS. THE CFI SAID THAT HE WAS UNABLE TO STABILIZE THE ACFT BEFORE IT HIT NOSE DOWN, COLLAPSING THE NOSE GEAR. THE ACFT THEN SKIDDED TO A STOP, ON ITS NOSE.

## Aircraft

- Registration: [N4347R](https://openairdocs.org/aircraft/N4347R), registered now, S/N 17265205 (OpenAirDocs)
- Reported make and model: CESSNA 172
- Registry model: [Cessna 172M](https://openairdocs.org/model/cessna-172m) (registry code 2072418) (OpenAirDocs)
- Category: Airplane
- Serial number: 17263098
- Engines: LYCOMING O-320-E2D 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Mccormick Aviation Inc.
- Airworthiness certificate: Standard, Normal
- Departed: FAM
- Airport: FAM, Farmington, runway 20, 3,895 × 60 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; commercial, flight instructor; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; flight hours: 1,240 total, 425 in this make and model, 1,030 as pilot in command, 46 in the last 90 days, 12 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 5 knots
- Visibility: 4 statute miles
- Lowest ceiling: 3,000 ft overcast
- Temperature: 77 °F, dew point -0 °F
- Altimeter: 30.00 inHg
- Observed at: CGI, 60 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 (OpenAirDocs).

- [Accident 19900825036539A](https://openairdocs.org/incident/19900825036539A), Aug 25, 1990: Cessna 172M, Farmington, MO, Substantial damage. Student made hard landing and porpoised. Out of phase with oscillations hit nose down. Collapsed nose gear.

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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