# NTSB FTW93LA007: Cessna 210G, N37SC, Little Rock, AR, October 7, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 7, 1992, 18:20 local (23:20 UTC)
- Place: Little Rock, AR
- Coordinates: 34.729942, -92.230773 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.7299&lon=-92.2308&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 14, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 18593
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW93LA007
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18593/pdf
- Page: https://openairdocs.org/ntsb/FTW93LA007

## Probable cause

THE PARTIAL FAILURE OF THE LANDING GEAR RETRACTION/EXTENSION ASSEMBLY FROM RESTRICTED HYDRAULIC FLUID MOVEMENT THROUGH A PARTIALLY FAILED MAIN LANDING GEAR UPLOCK RELEASE VALVE.

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise
  - landing gear,normal retraction/extension assembly - failure,partial (cause)
  - hydraulic system,relief valve - failure,partial (cause)
  - fluid,hydraulic - movement restricted (cause)
  - emergency procedure - performed, pilot in command
- Main gear collapsed, landing - flare/touchdown

## Analysis

AFTER TAKEOFF THE PILOT MOVED THE LANDING GEAR HANDLE TO RETRACT THE GEAR. HE DID NOT GET A GEAR UP LIGHT. HE THEN TRIED THE GEAR DOWN POSITION AND NO LIGHT ILLUMINATED. SEVERAL FLYBY'S WERE ACCOMPLISHED AND GROUND PERSONNEL INFORMED THE PILOT THAT THE NOSE GEAR WAS DOWN, THE MAIN GEAR WERE TRAILING, AND ALL GEAR DOORS WERE DOWN. THE PILOT CANCELLED HIS ORIGINAL FLIGHT PLAN AND REFILED VFR. UPON REACHING THE NEW DESTINATION, HE COMMUNICATED WITH TECHNICAL PERSONNEL BY RADIO IN AN EFFORT TO CORRECT THE MALFUNCTION. THE AIRPLANE WAS LANDED APPROXIMATELY 1.5 HOURS LATER ON RUNWAY 18. THE MAIN GEAR REMAINED UNLOCKED AND COLLAPSED UPON TOUCHDOWN. INSPECTION OF THE AIRPLANE REVEALED THE MAIN LANDING GEAR UPLOCK RELEASE VALVE HAD FAILED. THE VALVE WOULD ALLOW HYDRAULIC PRESSURE TO UNLOCK THE GEAR, BUT WOULD NOT ALLOW HYDRAULIC FLUID TO PASS THROUGH THE VALVE TO THE MAIN ACTUATORS.

## Aircraft

- Registration: [N37SC](https://openairdocs.org/deregistered/N37SC-2014-02-10), registration cancelled 2014-02-10, S/N 21058848, built 1967 (OpenAirDocs)
- Reported make and model: CESSNA 210G
- Registry model: [Cessna 210G](https://openairdocs.org/model/cessna-210g) (registry code 2073430) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 21058848
- Airframe hours: 3792
- Engines: CONTINENTAL IO-520A 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Richardson, Samuel M., doing business as Viking Industries, Inc.
- Registered owner: Richardson, Samuel M.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 25, 1991, 166 hours before
- Departed: F43, EL DORADO, AR
- Flight plan: VFR
- Airport: LIT, Little Rock Muni, runway 18, 5,124 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 55; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 3,962 total, 1,628 in this make and model, 3,725 as pilot in command, 55 in the last 90 days, 30 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 180° at 7 knots
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 73 °F, dew point 55 °F
- Altimeter: 29.00 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 19921007044309A](https://openairdocs.org/incident/19921007044309A), Oct 7, 1992: Cessna 210G, Little Rock, AR, Substantial damage. Unsafe gear indication, nose gear down, mains trailing. Collapsed landing. Main gear uplock release valve failed.

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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