# Franklin 6VS-335 series

- Type: Engine model (FAA registry)
- Registry code: 27040
- Manufacturer (registry): FRANKLIN
- Model: 6VS-335 SER
- Engine type: Reciprocating
- Power: 240 hp
- Data sheet: [TCDS 1E2](https://openairdocs.org/tcds/1E2) (OpenAirDocs)
- Holder: Franklin Sp. z.o.o.
- Installed in: 25 registered aircraft
- Page: https://openairdocs.org/engine/franklin-6vs-335-series

The registry names only the engine series, so ADs for every model in the series are matched.

## ADs that may apply (OpenAirDocs)

Matched to this engine model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

None matched.

## Registered aircraft (25)

- [N112BK](https://openairdocs.org/aircraft/N112BK): [Fordyce Joel M](https://openairdocs.org/faa-owner/FORDYCE%20JOEL%20M), [Gaston, OR](https://openairdocs.org/faa-place/OR/Gaston), built 1957, S/N 862
- [N2199](https://openairdocs.org/aircraft/N2199): [Heritage Flight Museum](https://openairdocs.org/faa-owner/HERITAGE%20FLIGHT%20MUSEUM), [Burlington, WA](https://openairdocs.org/faa-place/WA/Burlington), built 1952, S/N 604
- [N22AP](https://openairdocs.org/aircraft/N22AP): [Gospel Ministries International Inc](https://openairdocs.org/faa-owner/GOSPEL%20MINISTRIES%20INTERNATIONAL%20INC), [Collegedale, TN](https://openairdocs.org/faa-place/TN/Collegedale), S/N 1144
- [N245C](https://openairdocs.org/aircraft/N245C): [Hansen Christopher H](https://openairdocs.org/faa-owner/HANSEN%20CHRISTOPHER%20H), [Durhamville, NY](https://openairdocs.org/faa-place/NY/Durhamville), built 1953, S/N 324
- [N2862B](https://openairdocs.org/aircraft/N2862B): [Graulich David A](https://openairdocs.org/faa-owner/GRAULICH%20DAVID%20A), [Sharon Springs, NY](https://openairdocs.org/faa-place/NY/Sharon%20Springs), built 1957, S/N 1689
- [N41319](https://openairdocs.org/aircraft/N41319): [Aspinwall W Frank](https://openairdocs.org/faa-owner/ASPINWALL%20W%20FRANK), [Kingsland, GA](https://openairdocs.org/faa-place/GA/Kingsland), S/N 433
- [N44FP](https://openairdocs.org/aircraft/N44FP): [Shipman William L](https://openairdocs.org/faa-owner/SHIPMAN%20WILLIAM%20L), [Mc Calla, AL](https://openairdocs.org/faa-place/AL/Mc%20Calla), built 1946, S/N 1096
- [N469DW](https://openairdocs.org/aircraft/N469DW): [Bishop Thomas W](https://openairdocs.org/faa-owner/BISHOP%20THOMAS%20W), [Decatur, TX](https://openairdocs.org/faa-place/TX/Decatur), built 1956, S/N 869
- [N54594](https://openairdocs.org/aircraft/N54594): [Wagner Leslie P](https://openairdocs.org/faa-owner/WAGNER%20LESLIE%20P), [Indian Lake, NY](https://openairdocs.org/faa-place/NY/Indian%20Lake), S/N 873
- [N57893](https://openairdocs.org/aircraft/N57893): [Loudon Ross W Trustee](https://openairdocs.org/faa-owner/LOUDON%20ROSS%20W%20TRUSTEE), [Reno, NV](https://openairdocs.org/faa-place/NV/Reno), built 1955, S/N 715
- [N57FD](https://openairdocs.org/aircraft/N57FD): [Fort Wolters Helicopter Inc](https://openairdocs.org/faa-owner/FORT%20WOLTERS%20HELICOPTER%20INC), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), S/N 817
- [N57PD](https://openairdocs.org/aircraft/N57PD): [J R Trucking & Rigging Inc](https://openairdocs.org/faa-owner/J%20R%20TRUCKING%20%26%20RIGGING%20INC), [Pottsville, PA](https://openairdocs.org/faa-place/PA/Pottsville), built 1956, S/N 763
- [N59321](https://openairdocs.org/aircraft/N59321): [Fingerlakes Helicopter LLC](https://openairdocs.org/faa-owner/FINGERLAKES%20HELICOPTER%20LLC), [Auburn, NY](https://openairdocs.org/faa-place/NY/Auburn), built 1966, S/N C5018
- [N610X](https://openairdocs.org/aircraft/N610X): [Sky Horse Helicopters Inc](https://openairdocs.org/faa-owner/SKY%20HORSE%20HELICOPTERS%20INC), [Brady, TX](https://openairdocs.org/faa-place/TX/Brady), built 1963, S/N C-5009
- [N613HL](https://openairdocs.org/aircraft/N613HL): [Hood Paul D](https://openairdocs.org/faa-owner/HOOD%20PAUL%20D), [Broken Arrow, OK](https://openairdocs.org/faa-place/OK/Broken%20Arrow), S/N 283
- [N6417V](https://openairdocs.org/aircraft/N6417V): [Stokes Teddie V](https://openairdocs.org/faa-owner/STOKES%20TEDDIE%20V), [Holly Pond, AL](https://openairdocs.org/faa-place/AL/Holly%20Pond), built 1952, S/N 417
- [N6579D](https://openairdocs.org/aircraft/N6579D): [Ixl Inc](https://openairdocs.org/faa-owner/IXL%20INC), [Sulphur, LA](https://openairdocs.org/faa-place/LA/Sulphur), S/N 895
- [N6597D](https://openairdocs.org/aircraft/N6597D): [Heli Flite Inc](https://openairdocs.org/faa-owner/HELI%20FLITE%20INC), [Corona, CA](https://openairdocs.org/faa-place/CA/Corona), S/N 1017
- [N6744C](https://openairdocs.org/aircraft/N6744C): [Kiska Farms Inc](https://openairdocs.org/faa-owner/KISKA%20FARMS%20INC), [Pasco, WA](https://openairdocs.org/faa-place/WA/Pasco), S/N 556
- [N7110T](https://openairdocs.org/aircraft/N7110T): [Wright Donald E](https://openairdocs.org/faa-owner/WRIGHT%20DONALD%20E), [Greensboro, NC](https://openairdocs.org/faa-place/NC/Greensboro), S/N 46710
- [N7736](https://openairdocs.org/aircraft/N7736): [Shank Brian](https://openairdocs.org/faa-owner/SHANK%20BRIAN), [Manheim, PA](https://openairdocs.org/faa-place/PA/Manheim), built 1954, S/N K-8129
- [N8180H](https://openairdocs.org/aircraft/N8180H): [Pockrus Pat B](https://openairdocs.org/faa-owner/POCKRUS%20PAT%20B), [Mineral Wells, TX](https://openairdocs.org/faa-place/TX/Mineral%20Wells), built 1950, S/N 180
- [N8409E](https://openairdocs.org/aircraft/N8409E): [D'Agostino Gerald J](https://openairdocs.org/faa-owner/D'AGOSTINO%20GERALD%20J), [Middleburg Hts, OH](https://openairdocs.org/faa-place/OH/Middleburg%20Hts), built 1960, S/N 2603
- [N864Z](https://openairdocs.org/aircraft/N864Z): [Nelson Kevin K](https://openairdocs.org/faa-owner/NELSON%20KEVIN%20K), [Hadley, MN](https://openairdocs.org/faa-place/MN/Hadley), built 1962, S/N C-5004
- [N90724](https://openairdocs.org/aircraft/N90724): [Marsh Thomas R](https://openairdocs.org/faa-owner/MARSH%20THOMAS%20R), [Washington, DC](https://openairdocs.org/faa-place/DC/Washington), S/N 810

## NTSB investigations (70, newest 50)

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 ERA22LA069](https://openairdocs.org/ntsb/ERA22LA069), Nov 20, 2021: K Copters 47G-2 (N210JB), Lancaster, PA, substantial damage. Probable cause: The flight instructor’s failure to ensure a positive transfer of aircraft control, which resulted in a loss of control and collision with terrain.
- [NTSB ATL07LA045](https://openairdocs.org/ntsb/ATL07LA045), Feb 24, 2007: Hiller UH-12A (N8180H), Bethlehem, GA, substantial damage, 2 fatal. Probable cause: The pilot's failure to maintain adequate rotor rpm, which resulted in an attempted autorotation and in-flight collision with trees. Contributing to the severity of the accident was the pilot…
- [NTSB DFW05CA235](https://openairdocs.org/ntsb/DFW05CA235), Sep 10, 2005: Bell 47G (N862Z), Swifton, AR, substantial damage. Probable cause: The pilot's failure to maintain clearance with the power lines. A contributing factor was sun glare.
- [NTSB MIA01LA085](https://openairdocs.org/ntsb/MIA01LA085), Feb 24, 2001: Hiller UH-12B (N5307V), Whitesburg, GA, substantial damage. Probable cause: The improper emergency procedure performed by the pilot due to his electing to perform a run-on landing resulting in excessive airspeed at touchdown and subsequent roll-over following ground contact…
- [NTSB NYC99LA146](https://openairdocs.org/ntsb/NYC99LA146), Jun 16, 1999: Hiller UH-12C (N57CR), Delphos, OH, substantial damage. Probable cause: A blocked fuel line, from an unknown object, that resulted in fuel starvation, and total loss of engine power. A factor in the accident was the pilot's failure to maintain rotor rpm during the…
- [NTSB SEA95LA220](https://openairdocs.org/ntsb/SEA95LA220), Sep 17, 1995: Hiller UH-12A (N8180H), Bonners Ferry, ID, substantial damage. Probable cause: THE FLIGHT INSTRUCTOR'S MISJUDGING HIS FLARE DURING A SIMULATED AUTOROTATION.
- [NTSB SEA95LA022](https://openairdocs.org/ntsb/SEA95LA022), Nov 28, 1994: Hiller UH-12C (N54594), Twisp, WA, substantial damage. Probable cause: AN UNEXPLAINED LOSS OF POWER AND THE STUDENT PILOT'S DELAYED APPLICATION OF COLLECTIVE DURING THE LANDING FLARE.
- [NTSB LAX94FA354](https://openairdocs.org/ntsb/LAX94FA354), Sep 5, 1994: Stinson 108-3 (N6446M), Shelter Cove, CA, destroyed, 4 fatal. Probable cause: INADEQUATE PREFLIGHT BY THE PILOT, WHICH RESULTED IN FUEL STARVATION AND LOSS OF ENGINE POWER, IMPROPER (OR DELAYED) POSITIONING OF THE FUEL SELECTOR TO THE FULLEST TANK, AND FAILURE OF THE PILOT TO…
- [NTSB FTW94LA147](https://openairdocs.org/ntsb/FTW94LA147), May 8, 1994: Hiller UH-12B (N6417V), Crystal Beach, TX, substantial damage. Probable cause: THE PILOT'S IMPROPER AUTOROTATION TOUCHDOWN, WHICH RSULTED IN THE HARD LANDING. A FACTOR WAS THE POWER LOSS DUE TO WATER CONTAMINATED FUEL.
- [NTSB FTW94LA125](https://openairdocs.org/ntsb/FTW94LA125), Apr 16, 1994: Hiller UH-12 (N41319), Alvin, TX, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN ROTOR SPEED, DELAY OF THE FLARE, AND THE IMPROPER TOUCHDOWN. A FACTOR WAS THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS.
- [NTSB ATL92LA131](https://openairdocs.org/ntsb/ATL92LA131), Jun 25, 1992: Bell 47D1 (N68632), Centre, AL, substantial damage. Probable cause: THE PILOT'S INADEQUATE VISUAL LOOKOUT, RESULTING IN A COLLISION WITH A WIRE.
- [NTSB FTW91LA007](https://openairdocs.org/ntsb/FTW91LA007), Oct 20, 1990: Bell 47G (N1071Z), Grand Prairie, TX, substantial damage. Probable cause: THE PILOT'S INADEQUATE COMPENSATION FOR THE EXISTING TAILWIND CONDITIONS AND HIS FAILURE TO MAINTAIN ROTOR RPM.
- [NTSB MKC89LA016](https://openairdocs.org/ntsb/MKC89LA016), Oct 26, 1988: Hiller UH-12C (N57FD), Davenport, IA, substantial damage
- [NTSB NYC87LA129](https://openairdocs.org/ntsb/NYC87LA129), Apr 20, 1987: Bell 47G (N59321), Bethel, PA, substantial damage
- [NTSB SEA86FA139](https://openairdocs.org/ntsb/SEA86FA139), Jun 8, 1986: Hiller UH12B (N41319), Rathdrum, ID, destroyed
- [NTSB MKC86FA082](https://openairdocs.org/ntsb/MKC86FA082), Apr 7, 1986: Hiller UH-12B (N5307V), Fall River, KS, destroyed
- [NTSB MKC85FA114](https://openairdocs.org/ntsb/MKC85FA114), May 29, 1985: Bell OH-13E (N29WL), Jonesboro, AR, substantial damage
- [NTSB NYC85FNC03](https://openairdocs.org/ntsb/NYC85FNC03), Apr 28, 1985: Bell 47H-1 (N2827B), Guilford, VT, destroyed
- [NTSB CHI84LA211](https://openairdocs.org/ntsb/CHI84LA211), May 28, 1984: Bell 47G (N10174), Drummond Island, MI, substantial damage
- [NTSB FTW84LA099](https://openairdocs.org/ntsb/FTW84LA099), Dec 16, 1983: Hiller UH-12C (N63MC), Imperial, TX, substantial damage
- [NTSB ATL83LA315](https://openairdocs.org/ntsb/ATL83LA315), Aug 6, 1983: Bell 47D1 (N68632), Moultrie, GA, substantial damage
- [NTSB SEA83LA132](https://openairdocs.org/ntsb/SEA83LA132), Jun 23, 1983: Hiller UH-12B (N245C), Jerome, ID, substantial damage
- [NTSB NYC83FHM01](https://openairdocs.org/ntsb/NYC83FHM01), May 15, 1983: Bell 47G (N6597D), Plainsboro, NJ, destroyed
- [NTSB FTW82FPG11](https://openairdocs.org/ntsb/FTW82FPG11), May 8, 1982: Moore Bell 47D1 (N45867), Amagon, AR, destroyed, 1 fatal
- [NTSB DEN82FTM04](https://openairdocs.org/ntsb/DEN82FTM04), Nov 16, 1981: Hiller UH12C (N6417V), Logan, UT, substantial damage
- [NTSB FTW81FPD31](https://openairdocs.org/ntsb/FTW81FPD31), Jul 15, 1981: Hiller Acft UH-12C (N57CR), Burleson, TX, substantial damage
- [NTSB LAX81FUG06](https://openairdocs.org/ntsb/LAX81FUG06), Dec 25, 1980: Hiller Acft UH-12B (N94731), Rialto, CA, substantial damage
- [NTSB LAX80FA104](https://openairdocs.org/ntsb/LAX80FA104), Jun 11, 1980: Bell 47G (N8270E), Long Beach, CA, substantial damage
- [NTSB LAX79DUM13](https://openairdocs.org/ntsb/LAX79DUM13), Apr 24, 1979: Bell 47G-2A (N73872), Fallbrook, CA, substantial damage
- [NTSB MIA79FLD57](https://openairdocs.org/ntsb/MIA79FLD57), Apr 13, 1979: Bell 47-D1 (N68632), Clearwater, FL, destroyed
- [NTSB OAK79FVD11](https://openairdocs.org/ntsb/OAK79FVD11), Feb 25, 1979: Hiller UH-12B (N94731), Brentwood, CA, substantial damage
- [NTSB NYC78FHM27](https://openairdocs.org/ntsb/NYC78FHM27), Aug 29, 1978: Hiller 12C (N63MC), Neptune, NJ, substantial damage
- [NTSB OAK77DVW31](https://openairdocs.org/ntsb/OAK77DVW31), Jun 25, 1977: Bell 47SG (N979B), Ash Springs, NV, substantial damage
- [NTSB LAX77DVA16](https://openairdocs.org/ntsb/LAX77DVA16), Jan 15, 1977: Hiller Acft UH-12C (N6417V), Terra Bella, CA, substantial damage
- [NTSB LAX77FUM12](https://openairdocs.org/ntsb/LAX77FUM12), Jan 13, 1977: EL Tomcat 47G (N73872), San Diego, CA, substantial damage
- [NTSB NYC76FGT27](https://openairdocs.org/ntsb/NYC76FGT27), Aug 18, 1976: Bell 47D1 (N919B), Zion Grove, PA, substantial damage
- [NTSB MIA76DKJ86](https://openairdocs.org/ntsb/MIA76DKJ86), Jul 24, 1976: Bell 47D1 (N29WL), Centre, AL, destroyed
- [NTSB MKC76FCD07](https://openairdocs.org/ntsb/MKC76FCD07), Aug 30, 1975: Bell H-13E (N29WL), Collins, IA, substantial damage
- [NTSB CHI74AC096](https://openairdocs.org/ntsb/CHI74AC096), Jun 2, 1974: Hiller Acft UH-12B (N6744C), Custar, OH, destroyed, 1 fatal
- [NTSB CHI74FEM62](https://openairdocs.org/ntsb/CHI74FEM62), May 29, 1974: EL Tomcat I (N73872), Belding, MI, substantial damage
- [NTSB IAD74FIA14](https://openairdocs.org/ntsb/IAD74FIA14), May 8, 1974: Bell 47D1 (N919B), Stephens City, VA, substantial damage
- [NTSB MIA74FLA08](https://openairdocs.org/ntsb/MIA74FLA08), Aug 5, 1973: Bell 47D-1 (N6579D), Destin, FL, substantial damage
- [NTSB CHI74FEA04](https://openairdocs.org/ntsb/CHI74FEA04), Jul 13, 1973: Bell 47G-3 (N8416E), Dana, IN, substantial damage
- [NTSB CHI73DEA37](https://openairdocs.org/ntsb/CHI73DEA37), Jun 5, 1973: Bell 47D-1 (N2794A), Bloomfield, IN, destroyed
- [NTSB FTW73DPJ20](https://openairdocs.org/ntsb/FTW73DPJ20), May 28, 1973: Hiller UH-12B (N6744C), Guymon, OK, substantial damage
- [NTSB MIA73FKT53](https://openairdocs.org/ntsb/MIA73FKT53), Jan 22, 1973: Bell 47G (N864Z), Miami Beach, FL, substantial damage
- [NTSB SEA73DYA05](https://openairdocs.org/ntsb/SEA73DYA05), Aug 6, 1972: Bell 47G (N1071Z), Murtaugh, ID, substantial damage
- [NTSB MIA72FKQ12](https://openairdocs.org/ntsb/MIA72FKQ12), Aug 27, 1971: Bell 47D-1 (N2794A), Mt Olive, MS, substantial damage
- [NTSB MKC72FCG11](https://openairdocs.org/ntsb/MKC72FCG11), Aug 11, 1971: Hiller UH-12A (N4287C), Springfield, MO, substantial damage
- [NTSB CHI71DEI52](https://openairdocs.org/ntsb/CHI71DEI52), May 27, 1971: Bell 47D1 (N68632), Bloomdale, OH, substantial damage

All 70: https://openairdocs.org/engine/franklin-6vs-335-series/ntsb.md

## FAA accident and incident reports (51, newest 50)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20211120022189A](https://openairdocs.org/incident/20211120022189A), Nov 20, 2021: K Copters 47G-2 (N210JB), Lancaster, PA, Substantial damage. On 11/20/2021 the instructor was providing flight instruction to student/owner in helicopter N210JB (k-copter 47 G-2). At approximately 1126 local time, while…
- [Accident 20070224002219A](https://openairdocs.org/incident/20070224002219A), Feb 24, 2007: Hiller UH12A (N8180H), Bethlehen, GA, Substantial damage, 2 fatal. (-23) On 02/24/2007, N8180H, helicopter, Hiller-UH12-1, with 2 pilots on board, was performing hovering maneuvers in a heavily wooded area. PIC experienced…
- [Accident 20050911022759A](https://openairdocs.org/incident/20050911022759A), Sep 11, 2005: Bell 47G (N862Z), Newport, AK, Destroyed. (-23) On September 9, 2005, at 1642 central daylight time, a Bell 47G helicopter N862Z, was destroyed during cruise flight at 35 feet after contacting an…
- [Incident 20021016030089I](https://openairdocs.org/incident/20021016030089I), Oct 16, 2002: Bell OH13EISENBG (N29WL), Marianna, AR, Minor damage. (-23) On October 16, 2002, at approximately 15:09 hours local time, N29WL, a Bell OH-13E impacted and severed a small set of electrical transmission wires…
- [Accident 20010224003379A](https://openairdocs.org/incident/20010224003379A), Feb 24, 2001: Hiller UH12B (N5307V), Whitesburg, GA, No damage. (-23) On final approach to the proposed landing site, N5307V, the Hiller UH-12B lost power and engine quit. Fuel starvation of the main boost pump did not…
- [Accident 19990616007139A](https://openairdocs.org/incident/19990616007139A), Jun 16, 1999: Hiller UH12C (N57CR), Delphos, OH, Destroyed. 1956 Hiller-world helicopters UH-12C helicopter lost power, and the pilot auto-rotated the acft, the main rotor flexed on landing and severed the tail of the…
- [Incident 19980405010979I](https://openairdocs.org/incident/19980405010979I), Apr 5, 1998: Bell 47G (N6597D), Sand Springs, OK, Minor damage. Narrative: the aircraft hovered sideways, caught skid and skid collapsed. Student pilot was solo, instructor watching from the ground. While hovering a gust of…
- [Accident 19950916029899A](https://openairdocs.org/incident/19950916029899A), Sep 16, 1995: Hiller UH12A (N8180H), Bonners Ferry, ID, Substantial damage. Hard autorotation landing. Skid collapsed. Rotors chopped tailboom CFI misjudged flare height. Late on collective.
- [Incident 19950731020119I](https://openairdocs.org/incident/19950731020119I), Jul 31, 1995: Bell 47G (N2199), Wildwood, NJ, Minor damage. After maintenance elected to place helicopter on flat bed trailer. Misaligned. Left skid missed. Rolled over.
- [Accident 19941128039569A](https://openairdocs.org/incident/19941128039569A), Nov 28, 1994: Hiller UH12C (N54594), Twisp, WA, Substantial damage. Failed to timely flare from practice autorotation. Impacted hard. Main rotors chopped tailboom.
- [Accident 19940905024939A](https://openairdocs.org/incident/19940905024939A), Sep 5, 1994: Univar 1083 (N6446M), Shelter Cove, CA, Destroyed, 4 fatal. Engine quit on climbout then restarted and quit again. Stalled and spun into shore. Ran tank dry. Airspeed factors.
- [Accident 19940507010289A](https://openairdocs.org/incident/19940507010289A), May 7, 1994: Hiller UH12B (N6417V), Crystal Beach, TX, Substantial damage. Lost power on climbout. Turned downwind then into wind. Lost rotor RPM. Impacted. Rolled. Water in fuel.
- [Accident 19940416007929A](https://openairdocs.org/incident/19940416007929A), Apr 16, 1994: Hiller UH12B (N41319), Alvin, TX, Substantial damage. Allowed rotor speed to decay on climbout. Landed hard. Rotors chopped tailboom. Skids damaged.
- [Accident 19920625025579A](https://openairdocs.org/incident/19920625025579A), Jun 25, 1992: Bell 47D1 (N68632), Centre, AL, Substantial damage. Struck powerline during a spray run. Pilot failed to note powerline on pre-inspection.
- [Incident 19910312016039I](https://openairdocs.org/incident/19910312016039I), Mar 12, 1991: Bell 47G (N22AP), Miami, FL, Minor damage. On lift off from vacant lot vortex picked up a cable. It was sucked through the rotor system.
- [Accident 19901020046509A](https://openairdocs.org/incident/19901020046509A), Oct 20, 1990: Bell 47G (N1071Z), Grand Prairie, TX, Substantial damage. While hover taxiing in gusty surface wind rotor speed decayed. Elected to land on uneven ground. Rolled over.
- [Incident 19900606018939I](https://openairdocs.org/incident/19900606018939I), Jun 6, 1990: Hiller H23B (N57893), East Wenatchee, WA, Minor damage. Helicopter being used to dry cherries in orchard. Pilot allowed RPM to decay. Rotor blades struck cherry trees.
- [Accident 19881026048299A](https://openairdocs.org/incident/19881026048299A), Oct 26, 1988: Hiller UH12C (N57FD), Davenport, IA, Substantial damage. Main rotors chopped off tailboom on a simulated autorotation landing. Pilot blamed soft ground.
- [Accident 19870420010689A](https://openairdocs.org/incident/19870420010689A), Apr 20, 1987: Bell 47G (N59321), Bethel, PA, Substantial damage. Student allowed helicopter to dip while changing from a hover to a landing mode. Main rotors struck the ground.
- [Accident 19860608022059A](https://openairdocs.org/incident/19860608022059A), Jun 8, 1986: Hiller UH12B (N41319), Rathdrum, ID, Destroyed. Aircraft was damaged and occupants injured during a hard emergency landing. Engine failed from fuel exhaustion.
- [Accident 19860407012159A](https://openairdocs.org/incident/19860407012159A), Apr 7, 1986: Hiller UH12B (N5307V), Fall River, KS, Destroyed. Struck trees trying to land in a open field. Student allowed rotor RPM to decay and descended into trees.
- [Accident 19850529020449A](https://openairdocs.org/incident/19850529020449A), May 29, 1985: Bell OH13EISENBG (N29WL), Jonesboro, AR, Substantial damage. Ran out of fuel during swath run. Touched down hard and rolled. Flagman injured by debris. Not RH rated or ag cert.
- [Accident 19850428016119A](https://openairdocs.org/incident/19850428016119A), Apr 28, 1985: Bell 47H1 (N2827B), Guilford, VT, Destroyed. Aircraft could not clear trees in takeoff path. Made pedal turn, lost rotor RPM and struck trees.
- [Accident 19840528018879A](https://openairdocs.org/incident/19840528018879A), May 28, 1984: Bell 47G (N10174), Drummond Island, MI, Substantial damage. A float touched the water during an aerial taxi around a buoy. Helicopter rolled over. Indicates dynamic rollover.
- [Accident 19831216061559A](https://openairdocs.org/incident/19831216061559A), Dec 16, 1983: Hiller UH12C (N63MC), Imperial, TX, Substantial damage. Experienced a shudder in cruise flight. Elected to land. Tail boom hit ground, then chopped off by main rotor.
- [Accident 19830806039329A](https://openairdocs.org/incident/19830806039329A), Aug 6, 1983: Bell 47D1 (N68632), Moultrie, GA, Substantial damage. Clutch slipped during spray operation. Lost rotor RPM causing helicopter to hit the ground and roll over.
- [Accident 19830623042019A](https://openairdocs.org/incident/19830623042019A), Jun 23, 1983: Hiller UH12B (N245C), Jerome, ID, Destroyed. Power loss returning to base. Made hard downwind autorotation landing. Engine fire consumed helicopter.
- [Accident 19830515019739A](https://openairdocs.org/incident/19830515019739A), May 15, 1983: Bell 47G (N6597D), Plainsboro, NJ, Destroyed. Helicopter crashed during aerial application flight when tail rotor drive shaft broke. PN476441799.
- [Incident 19830308016429I](https://openairdocs.org/incident/19830308016429I), Mar 8, 1983: Hiller UH12A (N8180H), Porterville, CA, Minor damage. Lack recent experience,had difficulty landing helicopter. Main rotors flexed down and severed tail rotor drive.
- [Accident 19820508016549A](https://openairdocs.org/incident/19820508016549A), May 8, 1982: Bell 47D1 (N45867), Amagon, AR, Destroyed. Helicopter crashed and burned during test flight to check spray nozzles. Witnesses heard engine popping.
- [Accident 19811116073989A](https://openairdocs.org/incident/19811116073989A), Nov 16, 1981: Hiller UH12C (N6417V), Logan, UT, Substantial damage. Helicopter crashed after takeoff due to fuel exhaustion.
- [Accident 19810715042299A](https://openairdocs.org/incident/19810715042299A), Jul 15, 1981: Hiller UH12C (N57CR), Burleson, TX, Substantial damage. Engine lost power after liftoff. Aborted. Helicopter rolled on impact. Fouled igniter. Engine gave prior warning.
- [Accident 19801225083009A](https://openairdocs.org/incident/19801225083009A), Dec 25, 1980: Hiller UH12B (N94731), Rialto, CA, Substantial damage. Engine quit, rolled over on emergency landing. Found fuel level low, below fuel line pickup.
- [Accident 19800611023309A](https://openairdocs.org/incident/19800611023309A), Jun 11, 1980: Bell 47G (N8270E), Long Beach, CA, Substantial damage. Helicopter rolled over on its side during landing.
- [Accident 19790424015409A](https://openairdocs.org/incident/19790424015409A), Apr 24, 1979: Bell OH13H (N73872), Fallbrook, CA, Substantial damage. Engine stopped during turn at low altitude. Autorotated. Made hard landing. Fuel mismanagement.
- [Accident 19790413005499A](https://openairdocs.org/incident/19790413005499A), Apr 13, 1979: Bell 47D1 (N68632), Clearwater, FL, Substantial damage. Pilot made quick stop to hover. Failed to maintain rotor RPM. Rotors hit ground. Aircraft rolled over.
- [Accident 19790225003659A](https://openairdocs.org/incident/19790225003659A), Feb 25, 1979: Hiller UH12C (N94731), Brentwood, CA, Substantial damage. Forced ldg due to engine failure. Inspection revealed heavy lead deposits on spak plugs.
- [Accident 19780829029349A](https://openairdocs.org/incident/19780829029349A), Aug 29, 1978: Hiller UH12C (N63MC), Neptune, NJ, Substantial damage. Ip did not slow high rate of descent in time to prevent hard land
- [Accident 19770115000349A](https://openairdocs.org/incident/19770115000349A), Jan 15, 1977: Hiller UH12B (N6417V), Terra Bella, CA, Substantial damage. Frost control. Rusty water,debris,tank sealer found in fuel. Service bulletin A-78 ncw.
- [Accident 19770113000979A](https://openairdocs.org/incident/19770113000979A), Jan 13, 1977: Bell 47G (N73872), San Diego, CA, Substantial damage. Spraying celery.
- [Accident 19760818027109A](https://openairdocs.org/incident/19760818027109A), Aug 18, 1976: Bell 47D1 (N919B), Zion Grove, PA, Substantial damage
- [Accident 19760724020409A](https://openairdocs.org/incident/19760724020409A), Jul 24, 1976: Bell OH13EISENBG (N29WL), Centre, AL, Substantial damage. Water and foreign matter found in acft fuel tank. No provision for water check in field refuel tank
- [Accident 19760625021589A](https://openairdocs.org/incident/19760625021589A), Jun 25, 1976: Bell 47G (N979B), NV, Substantial damage
- [Accident 19750830027419A](https://openairdocs.org/incident/19750830027419A), Aug 30, 1975: Bell OH13EISENBG (N29WL), Collins, IA, Substantial damage
- [Accident 19740602031629A](https://openairdocs.org/incident/19740602031629A), Jun 2, 1974: Hiller UH12B (N6744C), Custar, OH, Destroyed. Spray boom installation failed struck tail rotor
- [Accident 19740529016129A](https://openairdocs.org/incident/19740529016129A), May 29, 1974: Bell 47G (N73872), Belding, MI, Substantial damage. Pinion gears of upr spider asbly pn 47-620-424-1 MN trans faild. Acft nsed ovr.
- [Accident 19740508012069A](https://openairdocs.org/incident/19740508012069A), May 8, 1974: Bell 47D1 (N919B), Stephens City, VA, Substantial damage. Frost control over apple orchard. Starter end plate & armature found under eng.
- [Accident 19730805027969A](https://openairdocs.org/incident/19730805027969A), Aug 5, 1973: Bell 47D1 (N6579D), Destin, FL, Substantial damage. Hole burned thru top of piston,burned exh valve. Cause not dtmnd. Mech thought result of detonation.
- [Accident 19730713023389A](https://openairdocs.org/incident/19730713023389A), Jul 13, 1973: Bell 47G3B1 (N8416E), Dana, IN, Destroyed. Eng lost pwr,settled into trees. Plugs fouled & oily.
- [Accident 19730528012929A](https://openairdocs.org/incident/19730528012929A), May 28, 1973: Hiller UH12B (N6744C), Guymon, OK, Substantial damage. Aftr t/o to hover then trans lift eng pwr levr stuck. Eng overboost,plt cut ign. Linkage out of rig.

All 51: https://openairdocs.org/engine/franklin-6vs-335-series/incidents.md

## STCs that may be installed (OpenAirDocs) (6)

Approved for this engine model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SE04651CH](https://openairdocs.org/stc/SE04651CH): To allow use of l00R grade aviation fuel meeting Swift Fuel, LLC specification SPEC-l00R-22. Swift Fuels LLC. Lists 6VS-335-A1A
- [STC SE2932SW](https://openairdocs.org/stc/SE2932SW): Install carburetor air temperature indicator. Approved for Aircooled Motors (Franklin Engine Co.) equipped with float carburetors. Model eligibility included here may not be inclusive. Alcor LLC. Lists 6VS-335-A
- [STC SE1311SO](https://openairdocs.org/stc/SE1311SO): Installation of Shivers carburetor temperature gauge with a Richter Aero Equipment B-5 carburetor temperature probe. LegacySTC.com. Lists 6VS-335-A
- [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc. Lists 6VS-335-A1A
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists 6VS-335-A
- [STC SE1-201](https://openairdocs.org/stc/SE1-201): Installation of the Richter Aero Equipment Type B-4 or B-5 Temperature Probe. (O-360 SERIES (excl. A1C, C2B, C2D)). MidContinent Instru Co Inc. Lists 6VS-335-A

## PMA parts (OpenAirDocs) (665, first 50)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this engine model on its data sheet, so check the FAA record before relying on it. Newest first.

- [72-231114-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126488040520260722204349.0001): TAG-Engine. Swift Fuels, LLC · PMA PQ04423CE · Modification part · Jul 17, 2026
- [AB-357426](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID184238701620251216184448.0001): Distributor Block. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-357426 · Dec 8, 2023
- [AB-382585](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID174195818620251216184454.0001): Ignition ContactAssembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-382585 · Dec 8, 2023
- [AB-400623](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID168816889220251216184444.0001): Ball Bearing. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental… · Dec 8, 2023
- [AB-357174](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID160990699020251216184451.0001): Ignition ContactAssembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-357174 · Dec 8, 2023
- [AB-157160](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID158401184520251216184437.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-157160 · Dec 8, 2023
- [AB-157158](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID158219565620251216184432.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental MotorsP/N: 10-157158 · Dec 8, 2023
- [AB-51678](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157802434020251216184508.0001): Oil Deflector. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-51678 · Dec 8, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID149337649120251216184433.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Dec 8, 2023
- [ES10-35936-7](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID148471542220251216184429.0001): Screw. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-35936-7 · Dec 8, 2023
- [AB-382584](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID126776576020251216184455.0001): Ignition ContactAssembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-382584 · Dec 8, 2023
- [AB-349511](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID120405838820251216184440.0001): Washer. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-349511 · Dec 8, 2023
- [AB-349326](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID116200064020251216184456.0001): Fish Paper. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-349326 · Dec 8, 2023
- [AB-349263](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID113648021920251216184506.0001): O-Ring. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-349263 · Dec 8, 2023
- [AB-357173](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID105495468820251216184452.0001): Ignition ContactAssembly. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental10-357173 · Dec 8, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID168354325020240301172638.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID145217999320240301172658.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID118323347220240301172648.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023
- [ES10-400303](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID106449388320240301172615.0001): Coupling,Impulse. Hartzell Engine Technologies LLC · PMA PQ1383CE · Replaces Continental 10-400303 · Dec 1, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID102475767020240301172654.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Dec 1, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID176360833820240301172648.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID172762233220240301172632.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID163685509620240301172639.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID162371588220240301172654.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID150014931220240301172641.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID147034297320240301172656.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID123063929720240301172657.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID115495300220240301172646.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104850212020240301172638.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID102201684720240301172637.0001): Hartzell Engine Technologies LLC · PMA PQ1383CE · Nov 9, 2023
- [ES10-400549-2](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID158172130220230929175036.0001): 200 Series Frame, Lyc Flange. Kelly Aerospace Energy Systems LLC · PMA PQ4176CE · Replaces 10-400549-2 · Jul 17, 2023
- [ES10-400551-8](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID178086668520231025135112.0001): Housing, Distributor. Kelly Aerospace Energy Systems LLC · PMA PQ4176CE · Replaces 10-400551-8 · Apr 1, 2023
- [ES10-25788](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID197042042020230703154012.0001): Bearing, Sleeve. Kelly Aerospace Energy Systems LLC · PMA PQ4176CE · Replaces 10-357078, 10-25788, 736 · Mar 20, 2023
- [ES10-56513](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157880742420230502200206.0001): Pin, Stop. Kelly Aerospace Energy Systems LLC · PMA PQ4176CE · Replaces 10-56513 · Feb 9, 2023
- [ES10-357165-20](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID117084116020220725141437.0001): Coil, Magneto. Kelly Aerospace Energy Systems LLC · PMA PQ4176CE · Replaces 10-357165-20, 10-357164-1 · Jun 9, 2022
- [AC-F17794](https://drs.faa.gov/browse/excelExternalWindow/914BBF6822F6710586258629005B50E0.0001): Packing, Valve Lifter Rod Tube. Airmotive Components LLC North Fabrication Shop · PMA PQ04438CE · Replaces 17794 · Nov 16, 2020
- [AC-F17864](https://drs.faa.gov/browse/excelExternalWindow/0929AE6FDAAFB5C286258629005B50A0.0001): Packing, Valve Lifter Rod Tube. Airmotive Components LLC North Fabrication Shop · PMA PQ04438CE · Replaces 17864 · Nov 16, 2020
- [AEF19421](https://drs.faa.gov/browse/excelExternalWindow/F71463A22AF9B03E862585930032B10D.0001): Piston Ring, Chrome Top Compression. Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 19421 · Jan 6, 2020
- [AEF17876](https://drs.faa.gov/browse/excelExternalWindow/E545136DD359016E862585930032ACD3.0001): Bearing, Crankshaft Propeller End, Even Cylinder Nos.. Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 17876 · Jan 6, 2020
- [AEF17722](https://drs.faa.gov/browse/excelExternalWindow/E46204402452C762862585930032AB9F.0001): Bearing, Crankshaft Gear End, Even Cylinder Nos.. Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 17722 · Jan 6, 2020
- [AEF19313](https://drs.faa.gov/browse/excelExternalWindow/E2DD2D059098B9B38625858B00324FA7.0001): Absorber, Magneto Drive. Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 19313 · Jan 6, 2020
- [AEF18028](https://drs.faa.gov/browse/excelExternalWindow/DE1A160A39E6D506862585930032AEE3.0001): Bearing, Crankshaft, Center, Even Cylinder Nos. (.010 OS). Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 18028 · Jan 6, 2020
- [AEF17808](https://drs.faa.gov/browse/excelExternalWindow/D5976C45FF0EBBAE862585930032AC6D.0001): Bearing, Thrust. Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 17808 · Jan 6, 2020
- [AEF18030](https://drs.faa.gov/browse/excelExternalWindow/D2E923AB1967B80B862585930032AF3C.0001): Bearing, Crankshaft, Gear End, Odd Cylinder Nos. (.010 OS). Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 18030 · Jan 6, 2020
- [AEF18033](https://drs.faa.gov/browse/excelExternalWindow/CD86C111D5951761862585930032AFCF.0001): Bearing, Crankshaft, Gear End, Even Cylinder Nos. (.020 OS). Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 18033 · Jan 6, 2020
- [AEF18563](https://drs.faa.gov/browse/excelExternalWindow/B7B15924B62AD68A862585930032B030.0001): Bearing, Crankshaft, Propeller End, Odd Cylinder Nos. (.010 OS). Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 18563 · Jan 6, 2020
- [AEF17708](https://drs.faa.gov/browse/excelExternalWindow/AE7543070C6B1823862585930032AACA.0001): Bearing, Camshaft. Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 17708 · Jan 6, 2020
- [AEF19756](https://drs.faa.gov/browse/excelExternalWindow/A668768330073F06862585930032B14C.0001): Absorber, Gear. Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 19756 · Jan 6, 2020
- [AEF18562](https://drs.faa.gov/browse/excelExternalWindow/A3E73564B91D3037862585930032AFF9.0001): Bearing, Crankshaft, Propeller End, Even Cylinder Nos. (.010 OS). Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 18562 · Jan 6, 2020
- [AEF19893](https://drs.faa.gov/browse/excelExternalWindow/9E12604C09CDD9EF862585930032B183.0001): Ring, Piston. Continental Aerospace Technologies Inc · PMA PQ1269CE-D · Replaces 19893 · Jan 6, 2020

All of them: https://openairdocs.org/engine/franklin-6vs-335-series/pma.md

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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.