# NTSB LAX01LA169: Cessna 421C, N26560, Angwin, CA, May 9, 2001 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: May 9, 2001, 08:05 local (15:05 UTC) - Place: Angwin, CA - Coordinates: 38.578609, -122.435279 - Nearby events: https://openairdocs.org/map.md?lat=38.5786&lon=-122.4353&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor, 3 uninjured - Status: Completed, report February 20, 2002 - Report: Approved by Office Director - Parties: Federal Aviation Administration - FSDO - NTSB case key (mKey): 52235 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX01LA169 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/52235/pdf - Page: https://openairdocs.org/ntsb/LAX01LA169 ## Probable cause Right main landing gear brake lockup during landing rollout for undetermined reasons. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, landing - roll - landing gear,normal brake system - locked (cause) - On ground/water collision with object, landing - roll - directional control - not maintained, pilot in command - object - fence post ## Analysis The pilot made a normal landing under calm wind conditions. During rollout he applied the brakes, and the right main landing gear brake locked up. The right tire skidded for about 600 feet, whereupon the pilot lost directional control. The airplane veered off the runway, traversed a field, and collided with a fence pole. The reason for the brake lockup was not determined. ## Factual narrative On May 9, 2001, about 0805 hours Pacific daylight time, a Cessna 421C, N26560, veered off the runway and collided with a fence during landing rollout at the Angwin-Parrett Field, Angwin, California. The airplane was owned and operated by the pilot, and it was substantially damaged during the mishap. The private pilot and two passengers were not injured. The third passenger received minor injuries. Visual meteorological conditions prevailed at the time, and no flight plan was filed. The business flight was performed under 14 CFR Part 91, and it originated from Stockton, California, about 0735. The pilot and a passenger indicated to the National Transportation Safety Board investigator that the touchdown felt normal. The pilot also reported that he believed the right brake locked up during rollout. Thereafter, he was not able to maintain directional control of his airplane. The pilot subsequently reported that his total experience flying airplanes was 1,117.8 hours. His experience flying the Cessna 421C was 312.5 hours. According to the Federal Aviation Administration coordinator, an examination of the runway revealed evidence of approximately 600-foot-long right main landing gear tire skid marks starting an estimated 500 feet beyond the landing threshold of runway 16. The skid marks terminated near where the airplane veered off the west side of the runway, about midfield. The airplane stopped upon traversing a field and colliding with a fence pole. At the time of the mishap, the wind was calm. The reason for the brake lockup was not determined. ## Aircraft - Registration: [N26560](https://openairdocs.org/aircraft/N26560), registered now, S/N 421C0802 (OpenAirDocs) - Reported make and model: Cessna 421C - Registry model: [Cessna 421C](https://openairdocs.org/model/cessna-421c) (registry code 2076016) (OpenAirDocs) - Category: Airplane - Serial number: 421C-0802 - Airframe hours: 2925 - Engines: Continental GTSIO-520-L 375 horsepower reciprocating - Damage: Substantial damage - Flight: Business, Part 91 - Registered owner: Chris Ronson - Airworthiness certificate: Standard, Normal - Last inspection: Annual, May 4, 2001, 6 hours before - Departed: SCK, STOCKTON, CA - Destination: 2O3, Angwin, CA - Airport: 2O3, Angwin-Parrett Field, runway 16, 3,217 × 50 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 54; injuries: none; private; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; last flight review July 29, 2000; seat: left; flight hours: 1,118 total, 313 in this make and model, 1,019 as pilot in command, 25 in the last 90 days, 12 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 0 knots - Visibility: 9 statute miles - Lowest ceiling: none - Temperature: 54 °F, dew point 50 °F - Altimeter: 29.90 inHg - Observed at: STS, 18 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 20010509026259A](https://openairdocs.org/incident/20010509026259A), May 9, 2001: Cessna 421C, Angwin, CA, Substantial damage. (-23) On touchdown, right main tire blew out, causing aircraft to veer off runway and through two fences before coming to stop. (.19) on may 9, 2001, about… 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.