# NTSB SEA86LA031: Cessna 402B, N4624N, Spokane, WA, December 27, 1985

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: December 27, 1985, 02:49 local (10:49 UTC)
- Place: Spokane, WA
- Location: 47.6190° N, 117.5352° W: Placed by OpenAirDocs at SPOKANE INTL (GEG), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.6190&lon=-117.5352&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 40340
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA86LA031
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/40340/pdf
- Page: https://openairdocs.org/ntsb/SEA86LA031

## Sequence of events

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

- Loss of engine power(partial) - nonmechanical, takeoff - initial climb
  - induction air control/system - blocked(partial) (cause)
  - powerplant controls - improper use of, pilot in command (cause)
  - weather condition - icing conditions (cause)
- Forced landing, descent - emergency
- In flight collision with object, descent - emergency
  - object - fence (contributing factor)
  - weather condition - dark night (contributing factor)
- In flight collision with terrain/water, landing

## Analysis

THE PLT REPORTED ENCOUNTERING ICING CONDITIONS DURING HIS APCH TO SPOKANE. UPON ARRIVAL, THE ACFT REMAINED AT SPOKANE FOR 30-40 MINUTES DURING WHICH FREEZING DRIZZLE AND BELOW FREEZING TEMPS EXISTED PRIOR TO AND DURING THE DEPARTURE. THE PLT DID NOT UTILIZE THE MANUALLY OPERATED ALTERNATE AIR SYSTEM ABOARD THE ACFT AND AS A RESULT, COLD, MOIST AIR WAS ENTRAINED INTO THE SUBFREEZING FILTER CHAMBERS. THE GRADUAL BLOCKAGE OF AIR FROM ICE IN THE FILTERS RESULTED IN A LOSS OF PWR ON BOTH ENGS. WITH SUFFICIENT PWR AVAILABLE THE PLT CHOSE TO EXECUTE AN INTENTIONAL FORCED LANDING. THE ACFT STRUCK AN ARPT PERIMETER FENCE DURING THE LANDING AND GROUND SLIDE.

## Aircraft

- Registration: [N4624N](https://openairdocs.org/deregistered/N4624N-2013-07-19), registration cancelled 2013-07-19, S/N 402B1376, built 1978 (OpenAirDocs)
- Reported make and model: CESSNA 402B
- Registry model: [Cessna 402B](https://openairdocs.org/model/cessna-402b) (registry code 207590P) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 402B1376
- Airframe hours: 39776
- Engines: CONTINENTAL TSIO-520-E 300 horsepower reciprocating
- Damage: Substantial damage
- Fire: On-Ground
- Flight: Part 135
- Operator: Regional Express Co.
- Registered owner: J.M. Bevans, III/G.B. Meisner
- Airworthiness certificate: Standard, Normal
- Departed: GEG, SPOKANE, WA
- Destination: LWS, LEWISTON, ID
- Airport: GEG, Spokane Intn'L, runway 21, 9,000 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 59; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 16,370 total, 700 in this make and model, 12,655 as pilot in command, 160 in the last 90 days, 5 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Night/dark
- Wind: 180° at 3 knots
- Visibility: 1 statute miles
- Lowest ceiling: 200 ft overcast
- Temperature: 21 °F, dew point 19 °F
- Altimeter: 30.00 inHg
- Observed at: GEG

## 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 19851227074959A](https://openairdocs.org/incident/19851227074959A), Dec 27, 1985: Cessna 402B, Spokane, WA, Substantial damage. Ice fouling air filters caused power loss on both engines after liftoff. Landed gear up, slid off end of runway.

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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