# NTSB DEN90LA044: Cessna 182, N5310B, Frederick, CO, January 16, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: January 16, 1990, 15:58 local (22:58 UTC)
- Place: Frederick, CO
- Coordinates: 40.099117, -104.940055 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.0991&lon=-104.9401&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 September 10, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 17881
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN90LA044
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17881/pdf
- Page: https://openairdocs.org/ntsb/DEN90LA044

## Probable cause

A PARTIAL ENGINE POWER LOSS INDUCED BY STUCK INTAKE VALVES. CONTRIBUTING TO THE ACCIDENT WAS THE INADEQUATE MAINTENANCE OF THE AIRPLANE AND THE UNSUITABLE TERRAIN IN WHICH THE FORCED LANDING WAS PERFORMED.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, takeoff - initial climb
  - engine assembly,valve,intake - movement restricted (cause)
  - maintenance,service of aircraft/equipment - inadequate, pilot in command (contributing factor)
- Forced landing, descent - emergency
  - terrain condition - soft
  - terrain condition - none suitable (contributing factor)
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - ditch
- Nose gear collapsed, landing - roll

## Analysis

THE PLT REPORTED THAT DURING INITIAL CLIMB, THE ENGINE BACKFIRED AND LOST PARTIAL POWER. HE SAID HE MADE A FORCED LANDING IN A SOFT FIELD. THE PLANE SLID UNDER POWER LINES, DOWN AN EMBANKMENT AND CAME TO REST NOSE DOWN ON A ROAD. A POST-ACCIDENT ENGINE RUN REVEALED TWO OR MORE STUCK VALVES, RESULTING IN THE ENGINE PRODUCING PARTIAL POWER.

## Aircraft

- Registration: N5310B (not matched to a registry record)
- Reported make and model: CESSNA 182
- Category: Airplane
- Serial number: 33310
- Airframe hours: 3360
- Engines: CONTINENTAL O-470-L 230 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Alfred P. Brown
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, March 1, 1989, 9 hours before
- Departed: CO58, FREDERICK, CO
- Destination: CO58

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 67; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 1,600 total, 1,100 in this make and model, 1,500 as pilot in command, 9 in the last 90 days, 3 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 40 statute miles
- Temperature: 39 °F

## 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 19900116000939A](https://openairdocs.org/incident/19900116000939A), Jan 16, 1990: Cessna 182, Frederick, CO, Substantial damage. Engine lost power on takeoff. Crash landed off end of runway. Intake valves stuck due to heavy carbon buildup.

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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