# NTSB LAX00LA155: Smith RV-4, N63SM, Willows, CA, April 15, 2000 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: April 15, 2000, 11:19 local (18:19 UTC) - Place: Willows, CA - Coordinates: 39.499515, -122.279914 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=39.4995&lon=-122.2799&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 2 minor - Status: Completed, report June 25, 2003 - Report: Approved by Office Director - NTSB case key (mKey): 48967 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX00LA155 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/48967/pdf - Page: https://openairdocs.org/ntsb/LAX00LA155 ## Probable cause Disconnection of the elevator push rod due to the owner/builder's improper installation of the rear jam nut on the elevator pushrod. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, cruise - miscellaneous,bolt/nut/fastener/clamp/spring - undertorqued (cause) - maintenance,installation - improper, owner/builder (cause) - flt control syst,elevator control cable/rod - disconnected (cause) - Loss of control - in flight, descent - emergency - elevator - not available, pilot in command - In flight collision with terrain/water, emergency descent/landing - terrain condition - open field ## Analysis The pilot reported that he lost elevator control while in cruise flight. He was attempting to land at an airport on a runway he was nearly aligned with. Using the manipulation of aircraft trim and throttle as a means of controlling the aircraft's pitch attitude, he tried to gain altitude by trimming the airplane in the full aft position, but found the elevator to be jammed. The pilot reduced the throttle and mixture and landed in a field. The airplane came to rest in an upright position. An FAA inspector examined the airplane following recovery and reported that control rod was improperly installed, allowing the rear jam nut on the elevator push rod to work loose. The push rod then rotated off the forward connection. ## Factual narrative On April 15, 2000, at 1119 hours Pacific daylight time, an amateur-built Smith RV-4, N63SM, made an off-airport forced landing after experiencing an elevator control problem in cruise flight near Willows, California. The airplane, owned and operated by the commercial pilot, under the provisions of 14 CFR Part 91, sustained substantial damage. The pilot and passenger suffered minor injuries. The personal flight originated from Lincoln, California, about 1045, and was en route to Willows. Visual meteorological conditions prevailed and no flight plan was filed. The pilot reported that the passenger had been flying the airplane from the backseat, and about 8 miles south of Willows, the passenger informed him that he had no fore or aft control authority. The pilot took the controls and confirmed that there was no elevator response from the stick but that he did have control continuity to the ailerons. The pilot stated that he planned to land using the manipulation of aircraft trim and throttle as a means of controlling the aircraft's pitch attitude. In an effort to avoid making any major heading changes, the pilot attempted to land on closed runway 30 because of his present near alignment with the runway. Due to the lack of control authority to the elevator, the pilot attempted to gain altitude by trimming the airplane in the full aft position. Due to insufficient altitude to make the airport, the pilot reduced the throttle and mixture controls and landed in a rice field about 1 mile south of the airport, coming to rest in an upright position. The pilot reported that he constructed the airplane in 1985, and had flown the airplane 22 hours since the last condition inspection on April 3, 2000. The pilot reported that he had made some adjustments to the elevator control rods about 29 days prior to the accident. A Federal Aviation Administration inspector from the Sacramento Flight Standards District Office examined the airplane following recovery. He reported that the rear jam nut on the elevator push rod had worked loose, allowing the push rod to rotate off the forward connection. He stated that the jam nut and control rod were improperly installed. ## Aircraft - Registration: [N63SM](https://openairdocs.org/aircraft/N63SM), registered now, S/N 63, built 1986 (OpenAirDocs) - Reported make and model: Smith RV-4 - Registry model: [Smith Ray H JR RV-4](https://openairdocs.org/model/smith-ray-h-jr-rv-4) (registry code 056081K) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 63 - Airframe hours: 484 - Engines: Lycoming O-320-A1A 150 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Ray H. Smith, Jr - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, April 3, 2000, 22 hours before - Departed: LHM, LINCOLN, CA - Destination: WLW ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 74; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 3,780 total, 460 in this make and model, 1,739 as pilot in command, 35 in the last 90 days, 29 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 120° at 22 knots - Visibility: 25 statute miles - Lowest ceiling: 3,000 ft broken - Altimeter: 29.00 inHg - Observed at: CIC, 26 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 20000415013399A](https://openairdocs.org/incident/20000415013399A), Apr 15, 2000: Amtr RV4, Willows, CA, Substantial damage. (-23) Shortly after reaching cruise altitude, pilot experienced elevator control problems. Using elevator trim and engine power he maintained a controlled… ## Other investigations on N63SM (1) 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. - [NTSB LAX87DVG01](https://openairdocs.org/ntsb/LAX87DVG01), Oct 4, 1986: Smith & R. Mathews RV-4 (N63SM), Lincoln, CA, substantial damage 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.