# NTSB FTW92LA032: Cessna 310D, N6890T, Hamilton, TX, December 2, 1991

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: December 2, 1991, 01:40 local (07:40 UTC)
- Place: Hamilton, TX
- Coordinates: 31.699266, -98.120033 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=31.6993&lon=-98.1200&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report July 14, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 18414
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW92LA032
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18414/pdf
- Page: https://openairdocs.org/ntsb/FTW92LA032

## Probable cause

THE INADVERTEND ENCOUNTER WITH ICING CONDITIONS. FACTORS WERE THE UNAVAILABILITY OF AN AIRPORT WEATHER OBSERVATION FACILITY AND THE DETERIORATED AIRCRAFT PERFORMANCE.

## Sequence of events

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

- In flight encounter with weather, circling (ifr)
  - weather condition - icing conditions (cause)
  - weather observation - unavailable, airport personnel (contributing factor)
  - aircraft performance - deteriorated (contributing factor)
  - wing - ice
- Forced landing, descent - emergency
  - planned approach - not possible, pilot in command
- In flight collision with object, descent - emergency
  - object - utility pole
  - object - building(nonresidential)

## Analysis

THE ATP RATED PILOT INADVERTENTLY ENCOUNTERED FREEZING RAIN WHILE CIRCLING TO LAND ON AN NDB APPROACH. THE AIRPORT DID NOT HAVE THE CAPABILITY TO PROVIDE WEATHER OBSERVATIONS. LOCAL AREA WEATHER OBSERVATION FACILITIES WERE EXPERIENCING LIGHT RAIN AT THE APPROXIMATE TIME OF THE ACCIDENT. THE WEATHER REPORTED TO THE PILOT BY THE APPROACH CONTROLLER, IMMEDIATELY PRIOR TO COMMENCING THE APPROACH, DID NOT INDICATE ANY RAIN ACTIVITY. THIS REPORT WAS BASED ON A THIRD FACILITY IN THE AREA. SURFACE TEMPERATURE WAS 34 DEGREES F.  THE ICE ACCUMULATION DEGRADED THE AIRPLANE PERFORMANCE TO A DEGREE WHICH RESULTED IN A FORCED LANDING. DURING THE LANDING THE AIRPLANE COLLIDED WITH FENCES AND A BARN. A POLICE OFFICER REPORTED HEAVY ICE ACCUMULATION ON THE AIRPLANE.

## Aircraft

- Registration: [N6890T](https://openairdocs.org/deregistered/N6890T-2013-05-02), registration cancelled 2013-05-02, S/N 39190, built 1960 (OpenAirDocs)
- Reported make and model: CESSNA 310D
- Registry model: [Cessna 310D](https://openairdocs.org/model/cessna-310d) (registry code 2074212) (OpenAirDocs)
- Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 39190
- Engines: CONTINENTAL IO-470D 260 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Harry G. Hanson
- Registered owner: Harry G. Hanson
- Departed: IAH, HOUSTON, TX
- Flight plan: IFR
- Airport: MNZ, Hamilton, runway 36, 3,600 × 50 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 57; flight instructor, airline transport, flight engineer; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: left; flight hours: 31,000 total, 2,600 in this make and model, 24,000 as pilot in command, 246 in the last 90 days, 82 in the last 30 days, 8 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Night/dark
- Wind: 320° at 10 knots
- Visibility: 7 statute miles
- Lowest ceiling: 500 ft broken
- Temperature: 34 °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 19911202053949A](https://openairdocs.org/incident/19911202053949A), Dec 2, 1991: Cessna 310D, Hamilton, TX, Substantial damage. Encountered heavy freezing rain on approach. Broke out but unable sustain flight due to heavy ice on airframe.

## Other investigations on N6890T (1)

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.

- [NTSB CHI67F0411](https://openairdocs.org/ntsb/CHI67F0411), Dec 19, 1966: Cessna 310D (N6890T), Muskegon, MI, substantial damage

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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