# NTSB LAX98FA064: Piper PA-11, N5532H, Willow Beach, AZ, December 30, 1997 - Type: NTSB accident investigation - Classification: Accident · Fatal · Field investigation · Final report - Date: December 30, 1997, 00:00 local (07:00 UTC) - Place: Willow Beach, AZ - Coordinates: 35.73694, -114.35654 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=35.7369&lon=-114.3565&mi=10 - Phase of flight: [Unknown](https://openairdocs.org/ntsb-phases/990) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 1 fatal - Status: Completed, report February 15, 2000 - Report: Approved by Office Director - NTSB case key (mKey): 29932 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX98FA064 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/29932/pdf - Page: https://openairdocs.org/ntsb/LAX98FA064 ## Probable cause The pilot's failure to maintain control of the aircraft for undetermined reasons. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, unknown - misc eqpt/furnishings,seat belt - failure,total - misc eqpt/furnishings,shoulder harness - not installed - maintenance - not performed, pilot in command (contributing factor) - aircraft control - not maintained, pilot in command (cause) - In flight collision with terrain/water, descent - uncontrolled - terrain condition - ground ## Analysis When the pilot failed to return from a local flight a search was initiated and the aircraft was found about 3 miles southeast of the departure airstrip. The aircraft collided with near level desert terrain at a 45-degree angle with no signs of rotation. The engine and accessories were examined and determined to be free of discrepancies. One propeller blade exhibited signs of rotation. A tachometer needle imprint was found about 975 rpm. An unquantified amount of fuel was present in the left wing fuel tank. The fuel system was approved for and operating on automobile gasoline. Internal fuel hose deteoriation was present obstructing a fuel sight gauge vent line and coupling hoses. Minor contamination was present in the fuel gascolator bowl along with a rust-colored water line. The aircraft was being operated without the front seat. Both rear seat belt attach points (.090 steel wire around 4130 steel tubing) had separated. No shoulder harness was installed. ## Factual narrative HISTORY OF FLIGHT On December 30, 1997, at an unknown time, a Piper PA-11, N5532H, was destroyed after colliding with terrain near White Hills, Arizona. The pilot received fatal injuries. Visual meteorological conditions prevailed for the personal flight and no flight plan was filed. The pilot departed the private Triangle Airpark about 0800 hours mountain standard time for a local area flight. When he failed to return by 1500, a relative departed in another aircraft to search for him. Subsequently, the wreckage was located about 3 miles southeast of Triangle Airpark. PERSONNEL INFORMATION The private pilot's logbook was not recovered. According to Federal Aviation Administration (FAA) records, the pilot reported a total flight time of 230 hours at his last third-class flight physical. AIRCRAFT INFORMATION The aircraft and engine records were not recovered. The Federal Aviation Administration (FAA) aircraft records branch was contacted for information on the airplane. According to a major repair and alteration Form 337, dated February 26, 1992, the airplane was approved for the use of automobile gasoline. The approval was by FAA supplemental type certificates (STC) STC-SE2031CE and STC-SA2080CE. The maintenance technician who performed the last annual inspection and Form 337 was contacted. He stated that he had not seen the aircraft since February 26, 1992. On January 8, 1998, a postaccident examination of the airframe and engine was conducted with parties from Piper Aircraft Company and Continental Motors. Examination of the fuel system revealed evidence of deteoriation to the Mil-6000 hose in the fuel system and the vent lines with some blockage and restriction. The fuel gascolator bowl retained some rubber particles and a rust colored water line in the bowl. WRECKAGE AND IMPACT INFORMATION The Safety Board examined the wreckage on site, which was located in semi-level brush covered desert terrain. The aircraft was at rest on a heading of 210 degrees magnetic. Instrument readings noted were: airspeed 112 mph; recording tachometer 861.16 hours; the magneto switches were both on; non-sensitive altimeter 8,100 feet; and the emergency locator beacon (ELT) battery date was December 1993. The ELT switch was found in the off position. One of the rescuers at the accident site vaguely remembered someone turning the switch off. The entire airplane was accounted for at the impact site. The airplane crush line at the nose section was measured at 45 degrees. Both landing gear assemblies were bent symmetrically aft. The airplane was intact with all control surfaces in position. The horizontal stabilizer trim jackscrew was measured full nose down trim with no signs of cable pull. Control cable continuity was established throughout. An unquantified amount of fuel was present in the left wing fuel tank. Fuel saturation of the soil was present at the engine area and outboard of the left wing about midspan. The wing fuel tank cap was installed with a forward facing ram air vent. The propeller was found in a vertical position with the 6 o'clock blade bent down and under the engine. That blade exhibited some chordwise striations and aft bending. The aircraft was being operated without the front seat. Both rear seat belt attach points (.090 steel wire around 4130 steel tubing) had separated. No shoulder harness was installed. There were an estimated 15 pounds of various items located in the baggage compartment. MEDICAL AND PATHOLOGICAL INFORMATION On December 31, 1997, the Mohave County Medical Examiner performed an autopsy on the pilot. The FAA Civil Aeromedical Institute in Oklahoma City, Oklahoma, reported the toxicological analysis was negative for carbon monoxide, cyanide, ethanol, and drugs. ADDITIONAL INFORMATION On February 13, 1998, the wreckage was released the pilot's widow. ## Aircraft - Registration: [N5532H](https://openairdocs.org/aircraft/N5532H), registered now, S/N 11-1035, built 1949 (OpenAirDocs) - Reported make and model: Piper PA-11 - Registry model: [Piper PA-11](https://openairdocs.org/model/piper-pa-11) (registry code 7101102) (OpenAirDocs) - Registry engine: [Continental C90 series](https://openairdocs.org/engine/continental-c90-series) (registry code 17009, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 11-1035 - Engines: Continental C-90-8F 90 horsepower reciprocating - Damage: Destroyed - Flight: Personal, Part 91 - Registered owner: James R. Dufresne - Airworthiness certificate: Standard, Normal - Departed: NONE, TRIANGLE AIRPRK, AZ ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 54; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: rear; toxicology performed; flight hours: 230 total ## Weather - Conditions: Visual (VMC), Day - Wind: 70° at 3 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 57 °F - Altimeter: 30.00 inHg - Observed at: IGM, 38 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 19971230039719A](https://openairdocs.org/incident/19971230039719A), Dec 30, 1997: Piper PA11, White Hills, AZ, Destroyed, 1 fatal. (.4)When the pilot failed to return from a local flight a search was initiated and the aircraft was found about 3 miles southeast of the departure airstrip.… 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.