# NTSB SEA96LA075: Ryan Navion, N4826K, Kent, WA, March 28, 1996 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: March 28, 1996, 10:40 local (18:40 UTC) - Place: Kent, WA - Coordinates: 47.399806, -122.190536 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=47.3998&lon=-122.1905&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report July 31, 1996 - Report: Approved by Office Director - NTSB case key (mKey): 42350 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA96LA075 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/42350/pdf - Page: https://openairdocs.org/ntsb/SEA96LA075 ## Probable cause the pilot's attempted operation with known deficiencies in the equipment, and a loose fuel system fitting. The pilot's failure to maintain maintenance service on the airplane was a factor. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, takeoff - initial climb - fuel system,line fitting - loose part/bolt/nut/clamp/etc (cause) - maintenance,service of aircraft/equipment - not maintained, pilot in command (contributing factor) - operation with known deficiencies in equipment - attempted, pilot in command (cause) - Forced landing, emergency landing after takeoff - Gear retraction on ground, landing - roll ## Analysis The pilot reported that he had been having a problem with the fuel pressure, but decided to fly the airplane anyway. Shortly after takeoff, the engine lost partial power. The pilot stated that he kept the engine running by pushing the boost pump as he made a 180-degree turn to land on the runway. Just prior to touchdown, the pilot lowered the landing gear, however, the gear was not fully down and locked before the airplane touched down. The main landing gear remained extended; however, the nose gear collapsed. During the postcrash inspection, a loose fitting on the fuel line running into the electric boost pump appeared to have been leaking fuel for some time. The last annual inspection performed on the airplane was in 1981. ## Factual narrative On March 28, 1996, at 1040 Pacific standard time, a Navion, N4826K, registered to and operated by the pilot as a 14 CFR Part 91 personal flight, experienced a loss of engine power shortly after takeoff from the Crest Airpark Airport, Kent, Washington. During the forced landing back to the runway, the nose gear collapsed. Visual meteorological conditions prevailed at the time and no flight plan was filed. The airplane was substantially damaged and the private pilot, the sole occupant, was not injured. During an interview and subsequent written statement, the pilot reported that he had been doing maintenance on the airplane, and that there was a problem with fuel pressure. The pilot stated that he had removed the fuel pump for inspection and then had reinstalled the pump, however, the problem continued. The pilot stated that prior to additional maintenance, he decided to fly the airplane. Shortly after takeoff, the engine experienced a partial loss of power and the pilot made a 180 degree turn to return to the runway. The pilot stated that he utilized the boost pump to keep the engine running. The pilot stated that just prior to the airplane touching down, he extended the landing gear, however, the landing gear was not fully down and locked at the time of touchdown. The main landing gear remained extended for the landing roll, however, the nose gear collapsed. After the accident, the engine was test run. The engine was hard to start, however, it ran at a low power setting before the throttle linkage broke. After the linkage was repaired, the engine was started again. At 2600 rpm, the engine ran rough and eventually lost power when the rpm was reduced to 2000 rpm. Inspection of the fuel lines revealed a loose fitting on the fuel line running into the electric boost pump. It appeared that the fitting had been loose and leaking fuel for some time. After the fitting was tightened, the fuel pressure increased and the engine ran smooth. Maintenance records indicate that the last annual inspection performed on the airplane was on June 12, 1981. The airplane had accumulated a total of 102 hours since the last inspection. ## Aircraft - Registration: [N4826K](https://openairdocs.org/deregistered/N4826K-2014-10-14), registration cancelled 2014-10-14, S/N NAV-4-1826, built 1949 (OpenAirDocs) - Reported make and model: Ryan NAVION - Registry model: [Ryan NAVION](https://openairdocs.org/model/ryan-navion) (registry code 6150160) (OpenAirDocs) - Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: NAV-4-1826 - Airframe hours: 1443 - Engines: Continental IO-470-C 250 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Cecil V. Criteser - Airworthiness certificate: Standard, Normal - Last inspection: Annual, June 12, 1981, 102 hours before - Airport: S36, Crest Airpark, runway 15, 3,267 × 40 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 67; private; airplane ratings: single-engine land; medical: class 3, expired; seat: left; flight hours: 3,500 total ## Weather - Conditions: Visual (VMC), Day - Wind: 300° at 2 knots - Visibility: 30 statute miles - Lowest ceiling: none - Temperature: 48 °F ## 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 19960328040689A](https://openairdocs.org/incident/19960328040689A), Mar 28, 1996: Tmpson NAVION*, Kent, WA, Substantial damage. Lost power on climbout. Turned back gear intransit landing. Nose collapsed. Loose fuel line. Last annual 1981. 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.