# NTSB LAX84FA299: Cessna TR182, N756BS, Big Bear City, CA, May 19, 1984

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Field investigation · Final report
- Date: May 19, 1984, 13:48 local (20:48 UTC)
- Place: Big Bear City, CA
- Coordinates: 34.26073, -116.840751 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.2607&lon=-116.8408&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 2 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 23956
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX84FA299
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/23956/pdf
- Page: https://openairdocs.org/ntsb/LAX84FA299

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - maintenance,inspection - inadequate (contributing factor)
  - ignition system,spark plug - other (cause)
  - ignition system,spark plug - leaded (cause)
  - weather condition - high density altitude (contributing factor)
  - mixture - improper use of, pilot in command (contributing factor)
- Forced landing, descent - emergency
- In flight collision with object, landing
  - object - tree(s) (contributing factor)

## Analysis

JUST AFTER TAKEOFF, SHORTLY AFTER LANDING GEAR RETRACTION, THE ENG BACKFIRED AND EXPERIENCED A TOTAL POWER LOSS. THE PLT LOWERED THE LANDING GEAR AND LANDED STRAIGHT AHEAD JUST OFF THE RWY. THE ACFT BOUNCED ONCE AND CAME TO REST IN A CITY PARK. IT IMMEDIATELY CAUGHT FIRE. THE TWO OCCUPANTS ESCAPED FROM THE ACFT, BUT WERE SERIOUSLY BURNED. INSPECTION OF THE ENGINE FOLLOWING THE ACCIDENT SHOWED EVIDENCE OF OVERHEATING. THERE WERE INDICATIONS ON ALL SPARK PLUGS OF HEAVY DEPOSITS OF LEAD AND OIL. THE SPARK PLUGS WERE NOT GAPPED CONSISTANTLY. THE ELECTRODES WERE GRAY IN COLOR. TESTS CONDUCTED ON THE PLUGS REVEALED THAT THE MAJORITY FAILED TO FIRE AT HIGH MANIFOLD PRESSURES. THE DENSITY ALTITUDE WAS APPROXIMATELY 10000 FT MSL. THE PLT STATED THAT ON RUN-UP THE ENGINE RAN ROUGH, BUT LEANING THE MIXTURE HELPED. HE STATED THAT HE ADJUSTED THE MIXTURE TO FULL RICH FOR TAKEOFF.

## Aircraft

- Registration: [N756BS](https://openairdocs.org/deregistered/N756BS-2013-05-08), registration cancelled 2013-05-08, S/N R18201032, built 1979 (OpenAirDocs)
- Reported make and model: CESSNA TR182
- Registry model: [Cessna TR182](https://openairdocs.org/model/cessna-tr182) (registry code 2072735) (OpenAirDocs)
- Registry engine: [Lycoming 0-540 series](https://openairdocs.org/engine/lycoming-0-540-series) (registry code 41532, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1032
- Airframe hours: 6137
- Engines: LYCOMING O-540-L3C5D 235 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Personal, Part 91
- Registered owner: Morton B. Weiner
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 1, 1983, 1,472 hours before
- Departed: L35, BIG BEAR CITY, CA
- Destination: TOA, TORRANCE, CA
- Airport: runway 7, 5,850 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 803 total, 276 in this make and model, 710 as pilot in command, 13 in the last 90 days, 6 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 4 knots
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 90 °F, dew point 48 °F
- Altimeter: 29.00 inHg
- Observed at: SBD, 23 nm away

## 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 19840519017749A](https://openairdocs.org/incident/19840519017749A), May 19, 1984: Cessna TR182, Big Bear City, CA, Destroyed. Lost power on takeoff after over boosting engine. Crashed into trees off end of runway. Spark plugs lead fouled.

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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