# NTSB investigations: Bell 206B: Loss of engine power(total) - mech failure/malf 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 FTW04IA043](https://openairdocs.org/ntsb/FTW04IA043.md): Bell 206B · Venice, LA · Incident · No injuries · Incident investigation · Final report · Nov 25, 2003 · N125TA · Minor damage > The failure of the forward boost pump while in cruise flight while operating with less than 10 gallons of fuel onboard, which resulted in a loss of engine power. A factor was the inoperative forward fuel boost pump caution light switch. - [NTSB CHI04LA027](https://openairdocs.org/ntsb/CHI04LA027.md): Bell 206B · Coleman, WI · Accident · Minor injuries · Limited investigation · Final report · Nov 3, 2003 · N3198C · Destroyed > The loss of engine power for undetermined reasons and the unsuitable terrain encountered for the forced landing. The garage building was a factor. - [NTSB ANC03LA073](https://openairdocs.org/ntsb/ANC03LA073.md): Bell 206B · Aniak, AK · Accident · Minor injuries · Limited investigation · Final report · Jul 10, 2003 · N111MT · Substantial damage > The compressor discharge pressure line (Pc line) B-nut coming loose at the fuel control unit, which resulted in a total loss of engine power, and subsequent in-flight collision with trees during an autorotation. A factor associated with the accident was the… - [NTSB LAX03LA183](https://openairdocs.org/ntsb/LAX03LA183.md): Bell 206B · Malone, TX · Accident · Minor injuries · Limited investigation · Final report · Jun 6, 2003 · N242TK · Substantial damage > a fuel starvation induced loss of engine power due to fuel contamination. - [NTSB LAX01FA306](https://openairdocs.org/ntsb/LAX01FA306.md): Bell 206B · Hilo, HI · Accident · Minor injuries · Field investigation · Final report · Sep 30, 2001 · N206KS · Destroyed > The failure of the mechanic to secure the No. 8 bearing thrust nut during maintenance work, which resulted in the total failure of the first stage turbine wheel shaft. Also causal was his misjudgment of his height during the flare resulting in a hard landing.… - [NTSB LAX01LA243](https://openairdocs.org/ntsb/LAX01LA243.md): Bell 206B · San Francisco, CA · Accident · No injuries · Limited investigation · Final report · Jul 12, 2001 · N474SF · Substantial damage > The failure of the accessory gearbox 2 1/2 bearing in fatigue resulting in the complete loss of engine power and a subsequent forced landing. The pilot's failure to maintain directional control during the autorotational flare maneuver is also causal. The… - [NTSB FTW01LA036](https://openairdocs.org/ntsb/FTW01LA036.md): Bell 206B · Rockport, TX · Accident · No injuries · Limited investigation · Final report · Dec 1, 2000 · N222LM · Substantial damage > the loss of engine power during cruise flight due to the fatigue fracture of the compressor coupling adapter. A contributing factor was the high sea condition existing for the forced landing. - [NTSB IAD99LA015](https://openairdocs.org/ntsb/IAD99LA015.md): Bell 206-B · Louisville, KY · Accident · Minor injuries · Limited investigation · Final report · Nov 12, 1998 · N32KY · Substantial damage > A loose 'B' nut on the aircraft's PC Air line which resulted in fuel starvation, and the pilot's abrupt application of aft cyclic to prevent a nose over. Contributing factors were soft terrain and dark night conditions. - [NTSB MIA96LA180](https://openairdocs.org/ntsb/MIA96LA180.md): Bell 206B · Pigeon Forge, TN · Accident · Serious injuries · Limited investigation · Final report · Jul 11, 1996 · N999TV · Substantial damage > fatigue failure of the engine PC line, induced by damage from improper installation, which resulted in a loss of engine power and an autorotative landing to unsuitable terrain. - [NTSB LAX96LA104](https://openairdocs.org/ntsb/LAX96LA104.md): Bell 206BIII · Kamuela, HI · Accident · No injuries · Limited investigation · Final report · Feb 1, 1996 · N90194 · Substantial damage > failure of the nose case (No.1) bearing resulting in oil starvation. - [NTSB FTW94LA110](https://openairdocs.org/ntsb/FTW94LA110.md): Bell 206B · Belen, NM · Accident · No injuries · Limited investigation · Final report · Mar 27, 1994 · N2779B · Substantial damage > The hard landing due to a delayed flare and improper touchdown. A factor was the loss of engine power. - [NTSB FTW93LA228](https://openairdocs.org/ntsb/FTW93LA228.md): Bell 206B · Pearland, TX · Accident · No injuries · Limited investigation · Final report · Aug 4, 1993 · N16814 · Substantial damage > Pilot's failure to maintain proper rotor RPM, the delayed flare, and improper touchdown. Factors were total failure of the power turbine due to oil starvation to the #8 bearing assembly. - [NTSB CHI90IA181](https://openairdocs.org/ntsb/CHI90IA181.md): Bell 206A · Lake Ozark, MO · Incident · No injuries · Incident investigation · Final report · Jul 19, 1990 · N206AT · Minor damage > Compression assembly blade and emergency floatation gear failure. - [NTSB ATL89FA112](https://openairdocs.org/ntsb/ATL89FA112.md): Bell 206B · Atlanta, GA · Accident · Serious injuries · Field investigation · Final report · Mar 22, 1989 · N5004F · Substantial damage > Fatigue failure of the engine spur adapter gearshaft in an area where there was a lack of lubrication (oil starvation) due to a partially blocked oil delivery tube. Contributing factors were: inattentive maintenance or servicing of the aircraft by unknown… - [NTSB FTW89LA036](https://openairdocs.org/ntsb/FTW89LA036.md): Bell 206B-III · S.Timbalier 151 · Accident · Minor injuries · Limited investigation · Final report · Jan 3, 1989 · N22704 · Destroyed > A collision between the aircraft and the platform during the emergency autorotation which caused the left skid and float to separate and destabilized the autorotation. The collision was probably unadoidable due to the maneuver that was being conducted at the… - [NTSB DEN88LA180](https://openairdocs.org/ntsb/DEN88LA180.md): Bell 206B · Sturgis, SD · Accident · No injuries · Limited investigation · Final report · Aug 11, 1988 · N49727 · Substantial damage > The plt was on a flt with 2 pax to take pictures. He stated that 'while in level flight at 120 mph and 300 feet above the ground, a pitch over was initiated for picture taking. At that moment, it appeared that the fuel flow cavitated. The forward fuel pump… - [NTSB BFO87FA057](https://openairdocs.org/ntsb/BFO87FA057.md): Bell 206B · Washington, DC · Accident · 3 fatal · Field investigation · Final report · Aug 21, 1987 · N83080 · Destroyed > The helicopter was on a LCL photography (sight-seeing) flt. While hovering at aprx 200' abv the potomac river, the eng lost pwr. The plt initiated an autorotation & deployed the emerg floats. Subsequently, the helicopter impacted in the river & rolled ovr,… - [NTSB LAX86LA155](https://openairdocs.org/ntsb/LAX86LA155.md): Bell 206B · Huntington Bch, CA · Accident · No injuries · Limited investigation · Final report · Mar 23, 1986 · N49643 · Substantial damage > A Bell 206B collided with a berm after an eng failure while departing a helipad. The plt indicated he had just departed the helipad at night and at aprx 50 ft AGL the eng failed. The acft vertical fin hit the berm causing the tail boom to bend aft of the… - [NTSB NYC85FNC04](https://openairdocs.org/ntsb/NYC85FNC04.md): Bell 206B · W. Brattleboro, VT · Accident · Serious injuries · Final report · May 30, 1985 · N23LV · Destroyed > The acft lost pwr during normal cruise. The plt attempted to autorotate into a clearing in the trees. Post accident exam discovered an air leak in the fuel control. The pressure compressor discharge (pcd) line 'b' nut was disconnected from the fuel control.… - [NTSB LAX85FA101](https://openairdocs.org/ntsb/LAX85FA101.md): Bell 206B · Trimmer, CA · Accident · Minor injuries · Field investigation · Final report · Jan 8, 1985 · N59549 · Substantial damage > The plt stated the helicopter lost pwr during cruise when he attempted to add pwr to climb. He stated that N2 decreased along with the activation of visual and audio engine out warnings. An autorotation was performed to a road, however, the helicopter slid… - [NTSB FTW84LA270](https://openairdocs.org/ntsb/FTW84LA270.md): Bell 206B · South Pelto · Accident · Minor injuries · Limited investigation · Final report · Jun 8, 1984 · N2276Q · Substantial damage > While cruising at 550 ft above the gulf of Mexico, the plt noted hi tot indications, followed by loss of N1 RPM & eng failure. An autorotation was initiated which terminated in a hard landing in 5 ft waves. One emergency float separated during the landing &… - [NTSB LAX84LA117](https://openairdocs.org/ntsb/LAX84LA117.md): Bell 206B III · Mountain City, NV · Accident · Serious injuries · Limited investigation · Final report · Dec 27, 1983 · N206JH · Substantial damage > The helicopter collided with the snow covered ground after the eng quit during a power-line patrol at about 30 ft AGL. The plt reported that the visibility was 1/2 mile with light snow falling. He also said he could see 4 to 7 of the supporting structures.… - [NTSB NYC84FA009](https://openairdocs.org/ntsb/NYC84FA009.md): Bell 206B III · Hudson, NH · Accident · 1 fatal · Field investigation · Final report · Oct 18, 1983 · N5011N · Destroyed > The plt was on a flt to pick up film for a tv station. While en route, he made a mayday call to the manchester control tower. According to witnesses, the acft was proceeding in a northerly direction at about 700 to 1000 ft AGL when they heard a 'muffled pop.'… - [NTSB MIA83LA199](https://openairdocs.org/ntsb/MIA83LA199.md): Bell 206B · Stuart, FL · Accident · No injuries · Limited investigation · Final report · Aug 4, 1983 · N51DC · Substantial damage > While in cruise flt at aprx 600 ft AGL, a catastrophic failure of the engine's 3rd stage turbine occurred. The plt related that he observed an engine chip detector light, which was followed almost immediately by fire in the engine. He made a successful… ## 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 x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('1181511') AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 351)) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?model=1181511&occurrence=351 --- 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.