# NTSB LAX99LA054: Williams Hurrican HP, N323DW, Corona, CA, November 21, 1998 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: November 21, 1998, 10:30 local (18:30 UTC) - Place: Corona, CA - Location: 33.8753° N, 117.5664° W: Placed by OpenAirDocs: center of Corona, CA, within about 6 miles (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=33.8753&lon=-117.5664&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report February 22, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 45522 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX99LA054 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/45522/pdf - Page: https://openairdocs.org/ntsb/LAX99LA054 ## Probable cause The seizure of the engine due to a cylinder/piston overheat condition for undetermined reasons. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(total) - mech failure/malf, climb - to cruise - engine assembly,cylinder - overtemperature (cause) - engine assembly,piston - overtemperature (cause) - reason for occurrence undetermined (cause) - engine assembly - seized (cause) - Forced landing, emergency descent/landing - On ground/water collision with object, landing - roll - object - tree(s) - object - fence - terrain condition - residential area ## Analysis The pilot departed the airport traffic pattern and reduced from a full power climb to a cruise power climb setting and checked the CHT and EGT gages, which were indicating in the normal range. After passing 2,500 feet msl, the engine rpm's slowed, then the engine quit altogether. While descending toward a football field for a forced landing, the pilot attempted to restart the engine without success. As he neared the field the pilot observed people on the landing area and diverted to an empty parking lot. During the landing the airplane collided with ground obstructions. Examination of the Rotax 503 engine revealed scored and heat discolored pistons. ## Factual narrative On November 21, 1998, at 1030 hours Pacific standard time, a Williams Hurrican HP experimental airplane, N323DW, collided with ground obstructions during a forced landing in Corona, California. The forced landing was precipitated by a total loss of power during cruise. The aircraft, owned and operated by the pilot under 14 CFR Part 91, sustained substantial damage. The pilot was the sole occupant and was not injured. Visual meteorological conditions prevailed at the time and no flight plan was filed for the local area personal flight that originated from the Corona airport about 1000. According to the pilot's written statement, he departed the airport traffic pattern and reduced from a full power climb to a cruise power climb setting and checked the CHT and EGT gages, which were indicating in the normal range. After passing 2,500 feet msl, the engine rpm's slowed, then the engine quit altogether. While descending toward a football field for a forced landing, the pilot attempted to restart the engine without success. As he neared the field the pilot observed people on the landing area and diverted to an empty parking lot. During the landing the airplane collided with ground obstructions. The pilot reported that by looking through the intake manifold of the Rotax 503 engine he could see that the pistons were scored and heat discolored. No further examination of the engine was conducted. ## Aircraft - Registration: [N323DW](https://openairdocs.org/deregistered/N323DW-2005-12-20), registration cancelled 2005-12-20, S/N 072 (OpenAirDocs) - Reported make and model: Williams HURRICAN HP (HURRICAN H) - Registry model: [Williams Dillard G HURRICAN H P](https://openairdocs.org/model/williams-dillard-g-hurrican-h-p) (registry code 05603X0) (OpenAirDocs) - Registry engine: [Bombardier ROTAX (ALL)](https://openairdocs.org/engine/bombardier-rotax-all) (registry code 09050, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 072 - Airframe hours: 307 - Engines: Rotax 503 reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Dillard G. Williams - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, January 23, 1998, 101 hours before - Departed: AJO ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 55; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: center; flight hours: 823 total, 708 in this make and model, 823 as pilot in command, 45 in the last 90 days, 11 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Visibility: 30 statute miles - Lowest ceiling: none - Temperature: 70 °F, dew point 39 °F - Altimeter: 29.00 inHg ## 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 19981121039139A](https://openairdocs.org/incident/19981121039139A), Nov 21, 1998: Amtr HURRICANHP, Corona, CA, Substantial damage. (.4)The pilot departed the airport traffic pattern and reduced from a full power climb to a cruise power climb setting and checked the CHT and EGT gages, which… 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.