# NTSB SEA00LA059: Aero Commander S2R, N3662X, Odessa, WA, March 31, 2000 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: March 31, 2000, 12:00 local (20:00 UTC) - Place: Odessa, WA - Coordinates: 47.340595, -118.660118 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=47.3406&lon=-118.6601&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report May 18, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 51319 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA00LA059 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/51319/pdf - Page: https://openairdocs.org/ntsb/SEA00LA059 ## Probable cause Disintegration of a lining of the right brake and subsequent lodging of brake lining debris between the brake housing and brake disc, resulting in seizure of the right brake. A factor was that directional control was not possible. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Airframe/component/system failure/malfunction, landing - landing gear,normal brake system - seized (cause) - directional control - not possible, pilot in command (contributing factor) - Nose over, landing ## Analysis The pilot reported that on landing, the aircraft's right brake locked up causing the aircraft to swerve to the right and overturn. In a post-accident examination of the aircraft, an FAA inspector found that one of the right brake's three linings had broken apart, and that debris from the lining had become lodged between the brake housing and the brake disc causing the brake to seize. The FAA inspector found that the aircraft had undergone an annual inspection in the month prior to the accident. ## Factual narrative On March 31, 2000, approximately 1200 Pacific standard time, an Ayres (formerly Aero Commander) S2R agricultural airplane, N3662X, operated by Smith Air Inc. of Odessa, Washington, nosed over when the right brake locked during landing at the Odessa municipal airport. The aircraft was substantially damaged in the accident, but the commercial pilot of the aircraft was not injured. Visual meteorological conditions were reported at Moses Lake, Washington (approximately 27 nautical miles west-southwest of Odessa) at 1152, and no flight plan was filed for the 14 CFR 137 local agricultural aerial application flight. The report prepared by the FAA inspector assigned to investigate the accident stated that the pilot reported to him that the aircraft's right brake locked while landing, causing the aircraft to suddenly swerve to the right and overturn. The FAA inspector's report stated that during his post-accident examination of the aircraft, he found that one of the three linings of the aircraft's right brake had broken apart. Debris from the lining had become lodged between the brake housing and the brake disc, causing the brake to seize. The FAA inspector reported that the accident aircraft underwent its last annual inspection in February 2000 at 7,197 hours airframe total time, and that the aircraft's total time at the time of the accident was 7,307 hours. The pilot did not return an NTSB Form 6120.1/2. ## Aircraft - Registration: [N3662X](https://openairdocs.org/aircraft/N3662X), registered now, S/N 1890R, built 1974 (OpenAirDocs) - Reported make and model: Aero Commander S2R - Registry model: [Aero Commander S2R](https://openairdocs.org/model/aero-commander-s2r) (registry code 0143022) (OpenAirDocs) - Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 1890R - Airframe hours: 7307 - Engines: P&W R-1340 reciprocating - Damage: Substantial damage - Flight: Aerial application, Part 137 - Registered owner: Smith Air Inc. - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, February 1, 2000, 110 hours before - Departed: WA43, ODESSA, WA - Airport: WA43, Odessa Municipal ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 37; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 8,804 total, 8,000 in this make and model, 120 in the last 90 days ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 61 °F, dew point 34 °F - Altimeter: 30.00 inHg - Observed at: MWH ## 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 20000331008549A](https://openairdocs.org/incident/20000331008549A), Mar 31, 2000: Ayres S2R, Odessa, WA, No damage. (-23) Pilot reported that the aircraft right brake locked while landing at the Odessa, WA. Airport causing the aircraft to suddenly swerve to the right and… ## Other investigations on N3662X (2) 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 WPR11CA252](https://openairdocs.org/ntsb/WPR11CA252), Jun 7, 2011: Aero Commander S2R (N3662X), Odessa, WA, substantial damage. Probable cause: The pilot's failure to maintain clearance from the other aircraft. - [NTSB SEA95LA143](https://openairdocs.org/ntsb/SEA95LA143), Jul 6, 1995: Aero Commander S2R (N3662X), Odessa, WA, substantial damage. Probable cause: LOSS OF ENGINE POWER DUE TO A CRACKED CYLINDER. 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.