# NTSB LAX99LA007: Cessna 190, N1087D, Lost Hills, CA, October 10, 1998 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: October 10, 1998, 10:20 local (17:20 UTC) - Place: Lost Hills, CA - Coordinates: 35.609405, -119.900871 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=35.6094&lon=-119.9009&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 3 minor - Status: Completed, report March 31, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 44137 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX99LA007 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/44137/pdf - Page: https://openairdocs.org/ntsb/LAX99LA007 ## Probable cause A loss of engine power due to fatigue failure of the number 4 cylinder articulating rod. ## 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, cruise - engine assembly,connecting rod - fatigue (cause) - engine assembly,connecting rod - fractured (cause) - Forced landing, landing - On ground/water encounter with terrain/water, landing - roll - terrain condition - ditch ## Analysis The engine made a loud sound and began to run rough during cruise. The pilot felt he had lost a cylinder and headed toward the nearby Lost Hills, California, airport. As he set up for final approach the pilot noticed a truck parked at the end of the runway. Since the truck remained stationary throughout his approach, the pilot tried to add power but the engine did not respond. The pilot pulled the nose up and cleared the truck. This forced him to land long and the aircraft departed the end of the runway and went into a ditch that was 15 feet wide and 8 feet deep. The doors were jammed and the occupants were forced to break the windshield with the fire extinguisher in order to exit the aircraft. Subsequent inspection by the Safety Board's Materials Laboratory revealed that the number 4 cylinder articulating rod had experienced a fatigue fracture which initiated at the corner of the I-beam section and propagated through its cross section. ## Factual narrative On October 10, 1998, at 1020 hours Pacific daylight time, a Cessna 190, N1087D, sustained substantial damage during a forced landing after a loss of engine power at the Lost Hills, California, airport. The commercial pilot/owner was conducting the personal flight under the provisions of 14 CFR Part 91. He and his two passengers sustained minor injuries. The aircraft departed from Delano, California, at 0920 for a local flight. Visual meteorological conditions prevailed and no flight plan was filed. The pilot stated the engine began to run rough and that he thought he had lost a cylinder. He elected to land at the nearby Lost Hills airport. On final approach, he noticed a truck parked on the approach end of the runway. He attempted to add power but the engine did not respond. Raising the nose of the aircraft provided enough altitude to clear the truck but forced him to land long. The aircraft exited the end of the runway and went into a ditch that was 15 feet wide and 8 feet deep. No fire occurred and the occupants broke the windshield with the fire extinguisher to egress from the aircraft. Approximately 4 feet of each wing tip was crushed. The landing gear was bent and twisted and the fuselage in the cabin area was buckled. One prop blade was bent aft and the cowling was crushed into the engine. The number 4 cylinder head was cracked from its base through the front spark plug hole. An inspection of the engine was conducted at Aircraft Recovery Services in Compton, California, on October 29, 1998. The engine rotated freely and a finger compression test was conducted. Cylinders 1, 2, 3, 5, 6, and 7 produced compression upon rotation of the crankshaft. Cylinder number 4 produced no compression and its piston did not move upon crankshaft rotation. After removal and disassembly of cylinder number 4, the piston skirt was observed to be damaged and the articulating rod was found in several pieces. Although the piston pin was intact, its bushing was fragmented. Examination by the Safety Board's Materials Laboratory disclosed micro fissuring, indicative of high stress fatigue cracking, on an undamaged area of one fracture surface. The fatigue initiated at the corner of the I-beam section of the connecting rod and propagated through its cross section. ## Aircraft - Registration: [N1087D](https://openairdocs.org/deregistered/N1087D-2015-05-13), registration cancelled 2015-05-13, S/N 7718, built 1951 (OpenAirDocs) - Reported make and model: Cessna 190 - Registry model: [Cessna 190](https://openairdocs.org/model/cessna-190) (registry code 2072902) (OpenAirDocs) - Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 7718 - Airframe hours: 1182 - Engines: Continental W-670-23 240 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Walter Joseph Gamboni - Airworthiness certificate: Standard, Normal - Last inspection: Annual, October 24, 1997, 8 hours before - Departed: DLO, DELANO, CA - Airport: L84, Lost Hills, runway 33, 3,020 × 60 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 74; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 3,000 total, 150 in this make and model, 3,000 as pilot in command, 3 in the last 90 days ## Weather - Conditions: Visual (VMC), Day - Wind: 0° at 4 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 61 °F, dew point 46 °F - Altimeter: 30.00 inHg - Observed at: BFL, 35 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 19981010028809A](https://openairdocs.org/incident/19981010028809A), Oct 10, 1998: Cessna 190, Lost Hills, CA, Substantial damage. Acft crashed into a ditch at the north end of the rwy. (-23) aircraft reported engine failed in cruise flight and crashed into a ditch at the end of the… 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.