# NTSB investigations: Engine bleed air system 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 ERA24LA135](https://openairdocs.org/ntsb/ERA24LA135.md): Cessna 172 · Homestead, FL · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 9, 2024 · N5171H · Substantial damage > A loss of engine power due to carburetor ice as a result of the pilot’s failure to use carburetor heat in conditions conducive to the formation of carburetor ice. - [NTSB WPR24LA070](https://openairdocs.org/ntsb/WPR24LA070.md): Air Tractor AT-502A · Stratford, CA · Accident · No injuries · Class 3 · Limited · Final report · Jan 10, 2024 · N6126U · Substantial damage > A partial loss of engine power due to the malfunction of the engine compressor bleed-off valve. - [NTSB DCA24LA330](https://openairdocs.org/ntsb/DCA24LA330.md): Boeing 737-8 · Kenner, LA · Incident · Class 2 · Limited · Final report · Dec 20, 2023 · N8830Q · Minor damage > A partial loss of engine power due to bird ingestion in the No. 1 (left) engine, which resulted in the activation of the load reduction device to prevent vibration. The load reduction device activation resulted in smoke and fumes entering the cockpit. - [NTSB ERA23LA066](https://openairdocs.org/ntsb/ERA23LA066.md): Piper PA-18-150 · St. Augustine, FL · Accident · No injuries · Class 3 · Limited · Final report · Nov 14, 2022 · N9858P · Substantial damage > The pilot’s failure to appropriately use carburetor heat, which resulted in a total loss of engine power due to carburetor icing. - [NTSB ERA21LA287](https://openairdocs.org/ntsb/ERA21LA287.md): Piper PA46-500TP · Manteo, NC · Accident · No injuries · Class 3 · Limited · Final report · Jul 6, 2021 · N31062 · Substantial damage > The improperly secured pneumatic compressor discharge air (P3) line coupling nut on the engine, which ultimately allowed the nut to back off resulting in a partial loss of engine power. - [NTSB WPR19LA242](https://openairdocs.org/ntsb/WPR19LA242.md): Lockheed C130 · Santa Barbara, CA · Accident · No injuries · Class 3 · Limited · Final report · Aug 26, 2019 · N119TG · Substantial damage > The failure of the No. 3 bleed air duct due to corrosion, which resulted in numerous system failures and the pilot’s inability to maintain directional control during the landing roll. - [NTSB CEN18FA277](https://openairdocs.org/ntsb/CEN18FA277.md): Cessna 152 · Fort Rice, ND · Accident · 1 fatal · Class 2 · Field · Final report · Jul 17, 2018 · N24515 · Substantial damage > The pilot's failure to use carburetor heat in conditions that were conducive to serious carburetor icing, which resulted in a loss of engine power, an exceedance of the airplane's critical angle of attack, and an aerodynamic stall. Contributing to the… - [NTSB DCA17LA182](https://openairdocs.org/ntsb/DCA17LA182.md): Bombardier CL 600 2C10 · Denver, CO · Accident · No injuries · Class 3 · Limited · Final report · Jul 2, 2017 · N796SK · Substantial damage > The fuel supply tube fitting pulling out of the left engine’s operability bleed valve (OBV) during the landing rollout, allowing fuel to leak and contact hot engine cases, which ignited a fire that caused thermal damage to the engine pylon. Contributing to… - [NTSB WPR17LA042](https://openairdocs.org/ntsb/WPR17LA042.md): Air Tractor AT 602 · Willows, CA · Accident · No injuries · Limited investigation · Final report · Dec 27, 2016 · N602L · Substantial damage > The decision of the maintenance facility mechanic to conduct maintenance without reference to the applicable manufacturer’s guidance, which resulted in the improper reassembly and subsequent failure of the engine compressor bleed valve, which in turn… - [NTSB WPR16LA134](https://openairdocs.org/ntsb/WPR16LA134.md): Bell OH 58A · Brawley, CA · Accident · No injuries · Limited investigation · Final report · Jul 2, 2016 · N6251G · Substantial damage > The engine's degraded performance due to excessive wear of the engine bleed valve, which prevented it from closing during the accident flight. Contributing to the accident was the operator's failure to overhaul the bleed valve within the… - [NTSB WPR16LA104](https://openairdocs.org/ntsb/WPR16LA104.md): Bell UH 1B · Maxwell, CA · Accident · No injuries · Limited investigation · Final report · May 7, 2016 · N486SA · Substantial damage > A reduction in available engine power during takeoff due to a stuck hot air valve, which resulted in low rotor rpm and a forced landing. Contributing to the accident was the lack of dry film lubricant and the presence of corrosion on the hot air valve… - [NTSB ENG12IA004](https://openairdocs.org/ntsb/ENG12IA004.md): Bombardier CL600 2C10 · Atlanta, GA · Incident · No injuries · Incident investigation · Final report · Oct 23, 2011 · N751EV · No damage > The Start Operability Bleed Valve (OBV) fuel return adapter-fitting fractured and separated in cyclic fatigue, which allowed fuel to spill onto a hot engine case that ignited the undercowl fire. The OBV fuel adapter-fitting was dropped and the damage reduced… - [NTSB CEN11LA370](https://openairdocs.org/ntsb/CEN11LA370.md): Bell 47G-3B-1 · Lakeville, MN · Accident · Serious injuries · Limited investigation · Final report · May 25, 2011 · N96SH · Substantial damage > The loss of engine power due to a loose B-nut on the compressor discharge pressure bleed line. - [NTSB CEN09LA401](https://openairdocs.org/ntsb/CEN09LA401.md): Air Tractor AT-602 · Knobel, AR · Accident · No injuries · Limited investigation · Final report · Jun 30, 2009 · N5192T · Substantial damage > The failure of the P-3 tube resulting in the loss of engine power. ## 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."mKey" IN (SELECT f.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_findings.parquet' f WHERE starts_with(f."findingCode", '010575')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-findings/010575/cases --- 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.