# NTSB SEA03LA069: Cessna 175B, N8159T, Bonanza, OR, April 23, 2003 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: April 23, 2003, 12:30 local (19:30 UTC) - Place: Bonanza, OR - Coordinates: 42.083332, -121.221946 - Nearby events: https://openairdocs.org/map.md?lat=42.0833&lon=-121.2219&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor, 1 uninjured - Status: Completed, report November 25, 2003 - Report: Approved by Office Director - Parties: Teledyne Continental Motors, FAA-FSDO - NTSB case key (mKey): 56878 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA03LA069 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/56878/pdf - Page: https://openairdocs.org/ntsb/SEA03LA069 ## Probable cause Separation of the connecting rod cap. Annual maintenance inspections which were disregarded by the owner/pilot was a factor. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, cruise - maintenance,annual inspection - disregarded, pilot in command (contributing factor) - engine assembly,connecting rod cap - separation (cause) - Forced landing, emergency descent/landing - On ground/water collision with object, landing - roll - object - pole (contributing factor) ## Analysis The pilot reported that while in cruise flight the engine made a loud sound followed by a partial loss of engine power. Shortly thereafter, smoke started coming in the cockpit and the engine lost complete power. The pilot initiated a forced landing to a county road. During the landing roll, the left wing collided with a power pole. The airplane spun around, the nose gear collapsed and the airplane subsequently nosed over. During the engine inspection, a large hole was found in the crankcase between the number 1 and 2 cylinders. The number 1 connecting rod bearing journal was deeply scored, blue in color and dry. Portions of the number 1 main bearing insert could be observed between the number 1 crank cheek and the number 1 main bearing saddle. The numbers 1 and 2 crank cheeks were blue in color and dry. The number 1 connecting rod was in pieces. The connecting rod cap had a portion of one bolt still present in the cap. The fracture area of the bolt was necked down in diameter and the bolt was blue in color. A matching portion of a bolt with the nut attached was recovered and noted that the fracture area was also necked down in diameter. The pilot reported that the maintenance logbooks had been destroyed in a hangar fire. The pilot also reported that the aircraft had not been maintained in accordance with an annual inspection for some time, as he had not been flying the aircraft since about 1997, when the engine was top overhauled. ## Factual narrative On April 23, 2003, at 1230 Pacific daylight time, a Cessna 175B, N8159T, registered to and operated by the pilot as a 14 CFR Part 91 personal flight, experienced a loss of engine power followed by a forced landing on a county road located 10 miles southeast of Bonanza, Oregon. During the landing roll, the aircraft collided with a pole. Visual meteorological conditions prevailed at the time and no flight plan was filed. The aircraft was substantially damaged. The commercial pilot was not injured, however, the passenger received minor injuries. The flight originated from a private airstrip in Wellington, Nevada, about three hours prior to the accident. During a telephone interview, and subsequent written statement, the pilot reported that while in cruise flight at 10,500 feet, the engine made a loud sound, followed by a partial loss of engine power. Shortly thereafter, smoke started coming in the cockpit and the engine lost complete power. The pilot initiated a forced landing to a county road. During the landing roll, the left wing collided with a power pole. The airplane spun around, the nose gear collapsed and the airplane subsequently nosed over. Inspection of the engine revealed a large hole in the crankcase between the numbers 1 and 2 cylinders. Portions of the numbers 1 and 2 connecting rods were recovered. Visual examination of pistons 1 and 2 found that the pistons were intact, however, several areas of the skirts had been broken off. The upper portions of both the 1 and 2 connecting rods were still attached to their respective piston pins. The crankshaft and counterweights were intact. The number 1 connecting rod bearing journal was deeply scored, blue in color and dry. The number 2 connecting rod bearing journal was bright, shiny and wet with oil. Portions of the number 1 main bearing insert could be observed between the number 1 crank cheek and the number 1 main bearing saddle. The numbers 1 and 2 crank cheeks were blue in color and dry. Portions of the number 1 connecting rod were blue in color and dry. Portions of the number 2 connecting rod were bright and shiny and wet with oil. The number 1 connecting rod cap had a portion of one bolt still present in the cap. The fracture area of the bolt was necked down in diameter and the bolt was blue in color. A matching portion of a bolt with the nut attached was recovered and noted that the fracture area was also necked down in diameter. The pilot was unable to locate the maintenance logbooks and assumed that they were destroyed in a fire that was on the pilot's property in February 2002. The pilot reported that the aircraft had not been maintained in accordance with an annual inspection for some time, as he had not been flying the aircraft since about 1997, when the engine was top overhauled. The pilot estimated approximately 80 to 90 hours had been accumulated on the engine since the top overhaul. The pilot estimated approximately 830 hours since the engine underwent a major overhaul. ## Aircraft - Registration: [N8159T](https://openairdocs.org/deregistered/N8159T-2003-09-19), registration cancelled 2003-09-19, S/N 17556859, built 1961 (OpenAirDocs) - Reported make and model: Cessna 175B - Registry model: [Cessna 175B](https://openairdocs.org/model/cessna-175b) (registry code 2072506) (OpenAirDocs) - Registry engine: [Continental GO-300 series](https://openairdocs.org/engine/continental-go-300-series) (registry code 17024, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 17556859 - Airframe hours: 2187 - Engines: Continental GO-300-D 175 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Samuel H. Dupuis - Airworthiness certificate: Standard, Normal - Departed: Wellington, NV - Destination: LMT, Klamath Falls, OR ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 76; injuries: none; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, expired; seat: left; flight hours: 400 in this make and model, 3 in the last 90 days, 3 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 14 knots - Visibility: 10 statute miles - Lowest ceiling: 3,000 ft broken - Temperature: 50 °F, dew point 37 °F - Altimeter: 29.81 inHg - Observed at: LMT, 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 20030423005689A](https://openairdocs.org/incident/20030423005689A), Apr 23, 2003: Cessna 175B, Bonanza, OR, Substantial damage. (-23) While en route from reno, NV to portland, OR the aircraft experienced an engine failure. The pilot attempted an emergency landing and while on roll out… 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. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.