# NTSB DEN84LA028: Cessna 170B, N3747C, Kalispell, MT, November 21, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 21, 1983, 08:30 local (15:30 UTC)
- Place: Kalispell, MT
- Coordinates: 48.189105, -114.379333 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=48.1891&lon=-114.3793&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16292
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN84LA028
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16292/pdf
- Page: https://openairdocs.org/ntsb/DEN84LA028

## Sequence of events

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

- Loss of control - in flight, approach - vfr pattern - final approach
  - anti-ice/deice system,pitot heat - lack of (contributing factor)
  - preflight planning/preparation - inadequate, pilot in command (cause)
  - wing - ice (contributing factor)
  - operation with known deficiencies in equipment - performed, pilot in command (cause)
  - judgment - poor, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
  - weather evaluation - inaccurate, pilot in command (cause)
- Undershoot, landing - flare/touchdown

## Analysis

THE ACFT LANDED HARD JUST SHORT OF THE RWY AFTER THE PLT EXPRIENCED ICING PROBLEMS IN FLT. THE AIRSPEED INDICATOR STOPPED WORKING IN FLT SO THE PLT WAS ATTEMPTING A LANDING AND SAYS HE ALSO LOST ENGINE POWER AT ABOUT 30 FT IN THE AIR DURING THE FLARE FOR LANDING. ACCORDING TO THE OPERATOR WHO EXAMINED THE ACFT THE WINGS CONTAINED ICE THAT HAD STREAKS OR MARKS ON IT AS IF SOMEONE TRIED TO REMOVE IT. THERE WAS ENOUGH LEFT HOWEVER TO AFFECT THE LIFTING QUALITIES OF THE WING, NO EVIDENCE WAS FOUND OF AN ENGINE MALFUNCTION.

## Aircraft

- Registration: N3747C (not matched to a registry record)
- Reported make and model: CESSNA 170B
- Category: Airplane
- Serial number: 26517
- Airframe hours: 1500
- Engines: CONTINENTAL C-145-2 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Ferry, Part 91
- Registered owner: Robert J. Brock
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, November 1, 1983
- Destination: CRANBROCK
- Flight plan: VFR
- Airport: S27, Kalispell City, runway 31, 3,600 × 70 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; private; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 341 total, 20 in this make and model, 274 as pilot in command, 20 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 20° at 10 knots
- Visibility: 30 statute miles
- Lowest ceiling: 9,000 ft broken
- Temperature: 28 °F, dew point 21 °F
- Altimeter: 29.00 inHg
- Observed at: FCA, 10 nm away

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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