# NTSB WPR12LA434: Navion Navion, N4418K, Lompoc, CA, September 23, 2012 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: September 23, 2012, 09:35 local (16:35 UTC) - Place: Lompoc, CA - Coordinates: 34.665554, -120.467498 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=34.6656&lon=-120.4675&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Defining event: [Initial climb: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report April 10, 2014 - Report: Approved by Office Director - NTSB office: Western Pacific Region - Parties: Federal Aviation Administration - NTSB case key (mKey): 85120 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR12LA434 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/85120/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=85120 - Page: https://openairdocs.org/ntsb/WPR12LA434 ## Probable cause A total loss of engine power after takeoff for reasons that could not be determined because postaccident examination did not reveal any anomalies that would have precluded normal operation. ## Findings NTSB's coded findings; those marked are part of the probable cause. - [Not determined](https://openairdocs.org/ntsb-findings/05000000): Not determined › Not determined · Unknown/Not determined (probable cause); cases with it: [Navion NAVION A, 2 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md?model=6150104), [All aircraft, 2,247 cases](https://openairdocs.org/ntsb-findings/05000000/cases.md) ## Sequence of events The events NTSB coded, in order, by phase of flight. The defining event best describes what happened. - [Initial climb: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [Navion NAVION A, 3 cases](https://openairdocs.org/ntsb-events/341/sequence.md?model=6150104), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) - [Emergency descent: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341); cases with it: [Navion NAVION A, 3 cases](https://openairdocs.org/ntsb-events/341/sequence.md?model=6150104), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md) - [Landing-flare/touchdown: Collision with terr/obj (non-CFIT) ](https://openairdocs.org/ntsb-events/470); cases with it: [Navion NAVION A, 2 cases](https://openairdocs.org/ntsb-events/470/sequence.md?model=6150104), [All aircraft, 10,189 cases](https://openairdocs.org/ntsb-events/470/sequence.md) ## Analysis After the airplane took off and turned downwind, the engine began to lose power. The pilot activated the boost pump, but this was followed by a total loss of engine power. The pilot then elected to return to the departure runway, but after he realized that he had insufficient altitude to reach the runway, he chose to land in an open field. Following touchdown, the airplane sustained substantial damage to the aft fuselage after sliding about 80 feet before coming to rest upright. A postaccident examination of the carburetor, boost pump, and relief valve revealed no anomalies that would have precluded normal operation. Although the airplane was operating in a regime where it may be susceptible to serious carburetor icing at cruise power, the engine was operating at higher power setting, and there was no evidence that carburetor icing played a role in the accident. The reason for the loss of engine could not be determined. ## Factual narrative On September 23, 2012, about 0935 Pacific daylight time, a Navion-A airplane, N4418K, sustained substantial damage following a forced landing due to a loss of engine power shortly after takeoff from the Lompoc Airport (LPC), Lompoc, California. The certified commercial pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed at the time of the accident, and a flight plan was not filed. The personal cross-country flight was being operated in accordance with 14 Code of Federal Regulations Part 91. The reported destination was the Lodi Airport (1O3), Lodi, California. In a statement submitted to the National Transportation Safety Board investigator-in-charge, the pilot reported that after taking off and while entering a left downwind leg at 1,200 feet, the engine began to lose power; after turning the boost pump on there was a total loss of power. The pilot stated that he then turned back toward the departure runway, turned the hydraulic power on and lowered the landing gear; the landing gear was retracted when the pilot realized he was too far from the runway to make a safe landing. The pilot opined that he maneuvered over power lines, turned about 30 degrees to the right and flew through the lowest gap in the approaching trees. The airplane landed in a soft dirt field and slid about 80 feet before coming to rest in an upright position. The airplane sustained substantial damage to the aft fuselage. A Federal Aviation Administration (FAA) aviation safety inspector reported that during his initial inspection of the engine the fuel pressure measured at the carburetor was 5 pounds per square inch (psi). The inspector further reported that after testing the fuel pressure several times the pressure increased to 10 psi, and that during a bench test of the relief valve, pressure at the relief valve was confirmed to be 10.5 psi; the engine requires a minimum pressure of 9 to 15 psi under normal conditions. Under the supervision of a FAA aviation safety inspector, the carburetor and boost pump were examined at the facilities of KPS Airmotive, Santa Clarita, California. The results of the examination revealed no anomalies with either component that would have precluded normal operation. (Refer to the KPS Airmotive report, which is appended to this report.) Maintenance records revealed that both magnetos and the airplane's boost pump were overhauled on June 21, 2012. At 0935, the LPC weather reporting facility, located about 3 nautical miles north of the accident site, reported wind 260 degree at 3 knots, visibility 10 miles, scattered clouds at 400 feet, temperature 15 degrees Celsius (C), dew point 11 degrees C, and an altimeter setting of 29.99 inches of mercury. The reason for the reported total loss of engine power was undetermined. ## Aircraft - Registration: [N4418K](https://openairdocs.org/deregistered/N4418K-2012-12-07), registration cancelled 2012-12-07, S/N NAV-4-1418, built 1948 (OpenAirDocs) - Reported make and model: NAVION NAVION (A) - Registry model: [Navion NAVION A](https://openairdocs.org/model/navion-navion-a) (registry code 6150104) (OpenAirDocs) - Registry engine: [Continental E225 series](https://openairdocs.org/engine/continental-e225-series) (registry code 17015, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: NAV-4-1418 - Year built: 1948 - Airframe hours: 865 - Engines: Continental Motors E225 225 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: Dylan L. Abbott - Registered owner: Dylan L. Abbott - Airworthiness certificate: Standard, Normal - Last inspection: Annual, August 26, 2012, 10 hours before - Departed: LPC, Lompoc, CA - Destination: 1O3, Lodi, CA - Airport: LPC, Lompoc Airport ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 30; injuries: none; commercial; airplane ratings: single-engine land; medical: class 2, without waivers/limitations; seat: left; flight hours: 650 total, 10 in this make and model, 617 as pilot in command, 108 in the last 90 days, 60 in the last 30 days, 5 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 260° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 59 °F, dew point 52 °F - Altimeter: 29.98 inHg - Observed at: LPC, 3 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 20120923022039A](https://openairdocs.org/incident/20120923022039A), Sep 23, 2012: Navion NAVION A, Lompoc, CA, Substantial damage. After take off, engine lost power on right downwind leg. Pilot turned fuel boost pump on, had no effect. Pilot turned back to runway for landing. Landed in… ## Docket (8 files) The files NTSB released with the investigation on March 27, 2014, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=85120. 5.5 MB in all. - Pilot/Operator Aircraft Accident Report, NTSB Form 6120.1 (item 1, .PDF, 778 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40406191&FileExtension=.PDF&FileName=Pilot%2FOperator%20Aircraft%20Accident%20Report,%20NTSB%20Form%206120.1-Redacted.PDF - Weather data (item 2, .PDF, 187 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40406197&FileExtension=.PDF&FileName=Weather%20data-Master.PDF - FAA inspector's report (item 3, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40406193&FileExtension=.PDF&FileName=FAA%20inspector%27s%20report-Redacted.PDF - KPS Airmotive report (item 4, .PDF, 183 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40406195&FileExtension=.PDF&FileName=KPS%20Airmotive%20report-Redacted.PDF - Excerpts from maintenancne records (item 5, .PDF, 1.5 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40406192&FileExtension=.PDF&FileName=Excerpts%20from%20maintenancne%20records-Redacted.PDF - Flight Manual supplement (item 6, .PDF, 2.3 MB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40406265&FileExtension=.PDF&FileName=Flight%20Manual%20supplement-Redacted.PDF - Fuel test report (item 7, .PDF, 452 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40406194&FileExtension=.PDF&FileName=Fuel%20test%20report-Redacted.PDF - Release of Aircraft Wreckage, NTSB Form 6120.15 (item 8, .PDF, 36 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40406196&FileExtension=.PDF&FileName=Release%20of%20Aircraft%20Wreckage,%20NTSB%20Form%206120.15-Redacted.PDF 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.