# NTSB MKC90LA069: Cessna 175, N7555M, Derby, KS, March 16, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 16, 1990, 16:30 local (22:30 UTC)
- Place: Derby, KS
- Coordinates: 37.540714, -97.250587 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.5407&lon=-97.2506&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report September 30, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 34946
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC90LA069
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34946/pdf
- Page: https://openairdocs.org/ntsb/MKC90LA069

## Probable cause

FAILURE OF THE NOSE GEAR YOKE.

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - roll/run
  - landing gear,nose gear - failure,total (cause)
- Nose down, takeoff - roll/run

## Analysis

THE PLT RPRTD THAT DURING THE TAKEOFF ROLL, THE NOSE WHEEL BEGAN TO SHIMMY AND VIBRATE, FOLLOWED BY A LOUD POPPING NOISE. THE NOSE OF THE ACFT THEN DROPPED DOWN, RESULTING IN SUBSTANTIAL DAMAGE TO THE PROPELLER, COWLING AND FIREWALL. A POST-ACCIDENT INVESTIGATION REVEALED THE NOSE GEAR YOKE HAD BROKEN OFF.

## Aircraft

- Registration: [N7555M](https://openairdocs.org/aircraft/N7555M), registered now, S/N 55855, built 1959 (OpenAirDocs)
- Reported make and model: CESSNA 175
- Registry model: [Cessna 175](https://openairdocs.org/model/cessna-175) (registry code 2072502) (OpenAirDocs)
- Registry engine: [Continental GO-300 series](https://openairdocs.org/engine/continental-go-300-series) (registry code 17024, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 55855
- Engines: LYCOMING O-360 180 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Hewinns, Stanley O.
- Registered owner: Hewins, Stanley O
- Airworthiness certificate: Standard, Normal
- Departed: K50, DERBY, KS
- Destination: FTW, DALLAS/FT WORTH, TX
- Airport: K50, Cook, runway 35, 3,200 × 40 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 243 total, 230 in this make and model, 12 in the last 90 days, 6 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 14 knots
- Visibility: 15 statute miles
- Lowest ceiling: 5,500 ft broken
- Temperature: 54 °F, dew point 34 °F
- Altimeter: 29.00 inHg
- Observed at: ICT, 8 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 19900316004739A](https://openairdocs.org/incident/19900316004739A), Mar 16, 1990: Cessna 175, Derby, KS, Substantial damage. Nose wheel shimmy on takeoff. Vibration broke nose gear yoke. Pilot failed to take load off nose gear to correct.

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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