# NTSB MKC89LA167: Cessna 320, N314D, St. Clair, MO, July 22, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 22, 1989, 18:30 local (23:30 UTC)
- Place: St. Clair, MO
- Coordinates: 38.350803, -90.979225 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.3508&lon=-90.9792&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report August 2, 1990
- Report: Approved by Office Director
- NTSB case key (mKey): 34837
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC89LA167
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34837/pdf
- Page: https://openairdocs.org/ntsb/MKC89LA167

## Probable cause

THE LANDING GEAR RETRACTION/EXTENTION SYSTEM FAILED FOR UNDETERMINED REASON.

## Sequence of events

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

- Complete gear collapsed, landing - roll
  - landing gear,normal retraction/extension assembly - failure,total (cause)
  - landing gear,normal retraction/extension assembly - undetermined (cause)

## Analysis

DURING THE LANDING ROLL, THE PILOT SAID THE LANDING GEAR COLLAPSED IN SEQUENTIAL ORDER OF RIGHT MAIN, NOSE WHEEL AND THE LEFT MAIN GEAR. POST ACCIDENT INVESTIGATION REVEALED NO MALFUNCTION OF ELECTRICAL OR MECHANICAL PORTION OF THE LANDING GEAR SYSTEM.

## Aircraft

- Registration: [N314D](https://openairdocs.org/aircraft/N314D), registered now, S/N 320C-0067, built 1965 (OpenAirDocs)
- Reported make and model: CESSNA 320
- Registry model: [Cessna 320C](https://openairdocs.org/model/cessna-320c) (registry code 2074510) (OpenAirDocs)
- Registry engine: [Continental TSI0-470-B](https://openairdocs.org/engine/continental-tsi0-470-b) (registry code 17029, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 320C0067
- Airframe hours: 5481
- Engines: CONTINENTAL TSIO-470-D 260 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Mosby, John
- Registered owner: Quadrant Co. Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, December 21, 1988, 10 hours before
- Departed: UBX, CUBA, MO
- Airport: K39, St. Clair, runway 20, 3,000 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 57; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 3,850 total, 820 in this make and model, 3,644 as pilot in command, 80 in the last 90 days, 4 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 5 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point -0 °F
- Altimeter: 30.00 inHg

## 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 19890722025379A](https://openairdocs.org/incident/19890722025379A), Jul 22, 1989: Cessna 320C, St Clair, MO, Substantial damage. Gear collapsed on landing roll. Defective squat switch allowed gear to retract on demand. No mechanical causes.

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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