# NTSB investigations, AK: Flight control sys malf/fail NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. ## Latest cases - [NTSB ANC25LA008](https://openairdocs.org/ntsb/ANC25LA008.md): Cub Crafters CC18-180 · Anchorage, AK · Accident · Serious injuries · Class 3 · Limited · Final report · Nov 2, 2024 · N55PK · Substantial damage > The incorrect installation of the rear flight control stick, resulting in the pilot’s inability to control the pitch attitude, coupled with the pilot’s inadequate control system check before departure, all which resulted in an aerodynamic stall during takeoff. - [NTSB ERA22LA358](https://openairdocs.org/ntsb/ERA22LA358.md): Cessna 207 · Dillingham, AK · Accident · No injuries · Class 3 · Limited · Final report · Jul 28, 2022 · N6908M · Substantial damage > Maintenance personnel’s failure to detect and correct improper rudder control system alignment, the resulting interference with the pulley’s rotation, and the accelerated corrosion and wear of the control cable, which ultimately led to its failure in flight. - [NTSB ANC21LA093](https://openairdocs.org/ntsb/ANC21LA093.md): Piper PA-22-150 · Chandalar Shelf, AK · Accident · No injuries · Class 4 · Limited · Final report · Sep 17, 2021 · N8061D · Substantial damage > A separation of the rudder cable from the rudder pedal due to the connecting bolt detaching for undetermined reasons, which resulted in a loss of directional control. - [NTSB ANC21LA075](https://openairdocs.org/ntsb/ANC21LA075.md): Piper PA-18 · Talkeetna, AK · Accident · Minor injuries · Class 3 · Limited · Final report · Aug 10, 2021 · N1264A · Substantial damage > The malfunction of the control stick during initial climb for reasons that could not be determined based on available evidence. - [NTSB ANC21LA064](https://openairdocs.org/ntsb/ANC21LA064.md): Piper PA-14 · Anchorage, AK · Accident · No injuries · Class 3 · Limited · Final report · Jul 23, 2021 · N4206H · Substantial damage > The fatigue fracture of the American Iron and Steel Institute (AISI) 1025 carbon steel rudder post, which resulted in structural failure of the rudder. Contributing to the fatigue failure was the post’s susceptibility to fatigue cracking under normal service… - [NTSB ANC16LA034](https://openairdocs.org/ntsb/ANC16LA034.md): De Havilland DHC3 · Homer, AK · Accident · No injuries · Limited investigation · Final report · Jun 19, 2016 · N104BM · Substantial damage > An in-flight collision with a bald eagle, which resulted in substantial damage to the left wing. - [NTSB ANC15LA037](https://openairdocs.org/ntsb/ANC15LA037.md): Dehavilland DHC-3T · Skwentna, AK · Accident · No injuries · Limited investigation · Final report · Jun 4, 2015 · N3125N · Substantial damage > The flutter failure of the right elevator servo tab due to the improper fabrication of the servo tab and maintenance personnel’s subsequent failure to detect anomalies with the servo tab. - [NTSB ANC15LA015](https://openairdocs.org/ntsb/ANC15LA015.md): Airbus AS350 B2 · Anchorage, AK · Accident · No injuries · Limited investigation · Final report · Mar 13, 2015 · N814EH · Substantial damage > The failure of the ball bearing within the pitch change spider assembly due to its operation with no grease within the bearing, which resulted in the subsequent fracture of the spider assembly and a loss of tail rotor control authority. Also causal to the… - [NTSB ANC15IA006](https://openairdocs.org/ntsb/ANC15IA006.md): Cessna 180J · Nome, AK · Incident · No injuries · Incident investigation · Final report · Dec 20, 2014 · N393B · Minor damage > The disengagement and subsequent binding of the right tailwheel steering cable, which disabled the rudder system. - [NTSB ANC14FA050](https://openairdocs.org/ntsb/ANC14FA050.md): Piper PA 12 · Anchorage, AK · Accident · 1 fatal · Field investigation · Final report · Jul 2, 2014 · N3512M · Substantial damage > The incorrect (reverse) rigging of the elevator control cables, and the pilot’s inadequate preflight inspection, which failed to detect the misrigging. - [NTSB ANC14LA035](https://openairdocs.org/ntsb/ANC14LA035.md): Dehavilland DHC-3T · Homer, AK · Accident · No injuries · Limited investigation · Final report · May 30, 2014 · N3125N · Substantial damage > The flutter failure of the right elevator servo tab due to the improper fabrication of the servo tab and maintenance personnel’s subsequent failure to detect anomalies with the servo tab. - [NTSB DCA12CA042](https://openairdocs.org/ntsb/DCA12CA042.md): Embraer EMB120 · Iliamna, AK · Accident · No injuries · Data collection · Final report · Feb 16, 2012 · N1110J · Substantial damage > the maintenance personnel's failure to install the cotter pins that secured castellated nuts on the left elevator vertical hinge bolts, which resulted in the left elevator partially detaching in flight. Contributing to the accident was the failure of… - [NTSB ANC11LA041](https://openairdocs.org/ntsb/ANC11LA041.md): Eclipse EA500 · Nome, AK · Accident · No injuries · Limited investigation · Final report · Jun 2, 2011 · N168TT · Substantial damage > The pilot landed without lowering the landing gear. Contributing to the accident was the pilot's decision to fly the airplane with an inoperative wing flap system. - [NTSB ANC10CA037](https://openairdocs.org/ntsb/ANC10CA037.md): Piper PA-18-150 · Port Moller, AK · Accident · No injuries · Data collection · Final report · May 6, 2010 · N3774Z · Substantial damage > The loss of the left rudder cable retaining bolt during base to final turn, resulting in a loss of control and impact with terrain. - [NTSB ANC09CA094](https://openairdocs.org/ntsb/ANC09CA094.md): Piper PA-18-150 · Fairbanks, AK · Accident · No injuries · Data collection · Final report · Sep 7, 2009 · N54182 · Substantial damage > A tailwheel malfunction that limited directional control, which resulted in a runway excursion, and collision with a building. - [NTSB ANC08LA083](https://openairdocs.org/ntsb/ANC08LA083.md): Bell UH-1B · Iliamna, AK · Accident · No injuries · Limited investigation · Final report · Jun 30, 2008 · N64RA · Substantial damage > The failure of company maintenance personnel to ensure the helicopter was properly maintained, resulting in a severe in-flight vibration due to collective bounce. Contributing to the accident was loose and worn bearings on the helicopter's stabilizer bar,… ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1 WHERE c."eventStateOrRegion" = 'AK' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '333' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-events/333/sequence?state=AK --- 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.