The U.S. aircraft register, updated daily
Accidents · NTSB WPR15LA014 · Final report

Cessna 172S accident near Big Bear, California, October 16, 2014

On October 16, 2014 at about 9:00 pm local time, a 2000 Cessna 172S, registered N612SP, was substantially damaged in an accident during enroute (cruise) near Big Bear, California. It was a personal flight under general aviation rules (Part 91). 3 people were seriously injured. The weather was visual conditions (good weather).

The NTSB's probable cause their words, unchanged

A partial loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.

Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.

What the record shows

Date
October 16, 2014 · about 9:00 pm local time
Place
Big Bear, California · map
Type
Accident
Injuries
3 people were seriously injured.
Weather
visual conditions (good weather)
Aircraft
Cessna 172S, built 2000 · all 172Ss on the register
Registration
N612SP · no longer on the register · serial 172S8594
Damage
Substantial damage
Flight
Personal flight · general aviation rules (Part 91)

The NTSB's narrative final · quoted from the NTSB record

The commercial pilot was conducting a personal cross-country flight during daytime visual meteorological conditions over mountainous terrain. He reported that, about 30 minutes into the flight, the engine began to lose power. The airplane descended into a box canyon, and the pilot then attempted to maneuver the airplane to initiate a 180-degree turn out of the canyon toward lower terrain. The airplane continued to descend, and the stall warning horn sounded, so the pilot decided to land in trees. First responders reported that the wing fuel tanks were breached and that fuel had drained out through holes in the wings. A postaccident examination of the airframe and engine revealed no evidence of any preexisting mechanical malfunctions or failures that would have precluded normal operation. The reason for the partial loss of engine power could not be determined.

The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.

The factual record from the NTSB's investigation tables, in plain English

What happened, in order

  1. Loss of engine power (partial) during enroute (cruise) defining event
  2. Collision with terrain or object (not controlled flight into terrain) during enroute (cruise)

The NTSB's findings

  • cause Not determined › Not determined › (general) › (general) › Unknown/Not determined
  • Environmental issues › Physical environment › Terrain › Mountainous/hilly terrain › Contributed to outcome
  • Environmental issues › Physical environment › Object/animal/substance › Tree(s) › Contributed to outcome

Pilot

  • Certificate: commercial pilot, private
  • Ratings: multi-engine land; single-engine land; instrument: airplane
  • Medical certificate: Class 2 (without waivers/limitations)
  • Seat: left
  • Injury: serious injuries

The aircraft

  • Airframe total time: 1,959 hours
  • Last inspection: annual inspection, March 6, 2013
  • Maximum gross weight: 2,299 lb
  • Seats: 4
  • Landing gear: fixed
  • Engine: Lycoming IO-360-L2A (piston); 1,959 hours total
  • Operator: Sohail Air Ventures LLC

The flight

  • Departed from: AJO Corona CA
  • Destination: Big Bear CA
  • Flight plan: none

Weather at the time

  • Light: daylight
  • Wind: from 260° at 10 knots
  • Visibility: 10 statute miles
  • Sky: clear
  • Temperature: 68°F (20°C), dew point 1°F (-17°C)
  • Altimeter: 30.14 inHg
  • Observation at 9:15 pm from L35, 8 miles away

Injuries

FatalSeriousMinorNone
Flight crew1
Passengers2

Documents from the investigation the NTSB's docket: the evidence folder behind the report

The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.

Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.