# NTSB investigations: Allison 250-C20 series, 2004 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 DFW05FA032](https://openairdocs.org/ntsb/DFW05FA032.md): Hughes 369D · Zachary, LA · Accident · Serious injuries · Field investigation · Final report · Dec 9, 2004 · N7148Z · Substantial damage > The loss of engine power as a result of fatigue cracking of the compressor adaptor coupling initiated by fretting on the pilot diameter and subsequent disconnection of the compressor from the turbine assembly. A contributing factor was the low operating… - [NTSB DEN05LA024](https://openairdocs.org/ntsb/DEN05LA024.md): Bell 206B3 · Eureka, UT · Accident · No injuries · Limited investigation · Final report · Nov 13, 2004 · N130JH · Substantial damage > the pilot's improper in-flight planning and decision making and failure to maintain obstacle clearance, resulting in contact with a power transmission line. Contributing factors include the intentional low-level maneuver, the power transmission line, and the… - [NTSB MIA05FA008](https://openairdocs.org/ntsb/MIA05FA008.md): Eurocopter Deutschland BO-105 CBS5 · Santa Rosa Bch, FL · Accident · 3 fatal · Field investigation · Final report · Oct 20, 2004 · N916SH · Destroyed > The pilot's spatial disorientation and in-flight loss of control of the helicopter after encountering night instrument meteorological conditions resulting in collision with water during the resultant uncontrolled descent. A factor in the accident was the… - [NTSB MIA04LA132](https://openairdocs.org/ntsb/MIA04LA132.md): Bell 206L · Gulf of Mexico · Accident · No injuries · Limited investigation · Final report · Sep 29, 2004 · N34CA · Destroyed > A loss of engine power for undetermined reasons while on short final to land on an oil platform in the Gulf of Mexico, which resulted in the pilot ditching the helicopter into the water. - [NTSB MIA04LA129](https://openairdocs.org/ntsb/MIA04LA129.md): Bell 206B3 · Starkville, MS · Accident · Minor injuries · Limited investigation · Final report · Sep 25, 2004 · N96PH · Substantial damage > The operator's inadequate maintenance inspections and the pilot's inadequate preflight inspection, which resulted in the helicopter being operated with a contaminated fuel system, that resulted in fuel starvation, and the loss of engine power. - [NTSB FTW04TA237](https://openairdocs.org/ntsb/FTW04TA237.md): Bell OH-58C · Beaumont, TX · Accident · 1 fatal · Final report · Sep 16, 2004 · N9273T · Destroyed > **This probable cause was modified on 2/22/2016. Please see the public docket for this accident for additional details.** The pilot's failure to maintain a safe altitude, resulting in collision with the water. A factor was the dark night. - [NTSB ATL04LA181](https://openairdocs.org/ntsb/ATL04LA181.md): Hughes HU-369-D · Waynesboro, GA · Accident · Minor injuries · Limited investigation · Final report · Sep 10, 2004 · N5211R · Substantial damage > The tail rotor assembly failed due to a fatigue fracture of the input gearshaft in the tail rotor gearbox assembly, which resulted in a loss of tail rotor control and subsequent collision with trees. - [NTSB SEA04LA181](https://openairdocs.org/ntsb/SEA04LA181.md): Hughes 369D · Cottage Grove, OR · Accident · No injuries · Limited investigation · Final report · Sep 4, 2004 · N505ST · Substantial damage > In-flight loss of engine power during cruise for undetermined reasons. - [NTSB MIA04LA123](https://openairdocs.org/ntsb/MIA04LA123.md): Bell 206B3 · Panama City, FL · Accident · No injuries · Limited investigation · Final report · Aug 24, 2004 · N107PH · Substantial damage > Inadequate maintenance inspection resulting in the partial loss of engine power due to a loose pneumatic line on the governor and ditching of the helicopter. - [NTSB MIA04LA121](https://openairdocs.org/ntsb/MIA04LA121.md): McDonnell Douglas 369E · Ochopee, FL · Accident · Minor injuries · Limited investigation · Final report · Aug 19, 2004 · N42928 · Substantial damage > The pilot's loss of control in flight for undetermined reasons, which resulted in an uncontrolled descent, and subsequent impact with trees and the terrain. - [NTSB SEA04TA163](https://openairdocs.org/ntsb/SEA04TA163.md): Bell 206B · Mead, WA · Accident · 1 fatal · Final report · Aug 17, 2004 · N34698 · Destroyed > The reversal of the reel machine during a sock line pull which resulted in a loss of control while hovering out of ground effect. Factors were the failure of company management to develop adequate procedures for conducting sock line pulls, the inadequate… - [NTSB LAX04CA315](https://openairdocs.org/ntsb/LAX04CA315.md): Bell 206B · Kahului, HI · Accident · Minor injuries · Data collection · Final report · Aug 16, 2004 · N529RS · Substantial damage > the pilot's inadequate compensation for the gusty crosswind conditions, which resulted in a dynamic rollover. Contributing factors were the direct crosswind and his lack of total experience in the accident helicopter make and model. - [NTSB FTW04LA197](https://openairdocs.org/ntsb/FTW04LA197.md): Bell 206B · East Cameron 13 · Accident · Minor injuries · Limited investigation · Final report · Jul 21, 2004 · N133RT · Substantial damage > The loss of engine power due to fuel exhaustion. Contributing factors were the fuel quantity gauge's improper fuel level indication, missing instrument placard, company maintenance personnel's improper maintenance records, disregard for company procedures,… - [NTSB FTW04GA076](https://openairdocs.org/ntsb/FTW04GA076.md): Schweizer 269D · San Antonio, TX · Accident · Minor injuries · Final report · Feb 19, 2004 · N255TP · Substantial damage > The loss of engine power due to the axial movement of the compressor rotor blades contacting the compressor vanes resulting in a subsequent compressor stall. A contributing factor was the improper assembly of the compressor section during the engine overhaul… - [NTSB FTW04TA075](https://openairdocs.org/ntsb/FTW04TA075.md): Bell 206B · Decatur, TX · Accident · Minor injuries · Final report · Feb 18, 2004 · N16MV · Destroyed > The pilot's failure to maintain control of the helicopter during liftoff after encountering dynamic rollover. A contributing factor was the rough and uneven terrain. ## 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 year(c."eventDate") = 2004 AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03020')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=03020&year=2004 --- 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.