# Lycoming GO-435 - Type: Engine model (FAA registry) - Registry codes: 41520, 42072 - Manufacturer (registry): LYCOMING - Model: GO-435 - Engine type: Reciprocating - Power: 210 hp - Data sheet: [TCDS E-228](https://openairdocs.org/tcds/E-228) (OpenAirDocs) - Holder: Lycoming Engines - Installed in: 33 registered aircraft - Page: https://openairdocs.org/engine/lycoming-go-435 Model codes come from the FAA registry's reference file. The FAA lists this model under more than one registry code, usually for different spellings of the maker. This page covers them all. ## 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. - [AD 2012-03-07](https://openairdocs.org/ad/2012-03-07): Carburetor · Lycoming Engines GO-435, GO-435-C2 (O-435-17), GO-435-C2A and 389 more. Effective Mar 27, 2012 - [AD 2004-10-14](https://openairdocs.org/ad/2004-10-14): Crankshaft gear · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 642 more. Effective Jun 25, 2004 - [AD 2003-14-03](https://openairdocs.org/ad/2003-14-03): Rotary fuel pumps · Lycoming Engines AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 262 more. Effective Aug 14, 2003 - [AD 90-04-06 R1](https://openairdocs.org/ad/90-04-06-R1): Propeller Governor External Oil Line · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 427 more. Effective May 28, 1991 Historical (superseded or no longer in force): - [AD 98-18-12](https://openairdocs.org/ad/98-18-12) (historical): Fuel Pump · Textron Lycoming, AVCO AEIO-540-D4A5, AEIO-540-D4B5, AEIO-540-D4C5 and 249 more. Effective Sep 28, 1998 ## Information bulletins (advisory) (2) - [SAIB NE-19-08](https://openairdocs.org/saib/NE-19-08): Reciprocating Engine Cylinder Section - Lycoming Engines Parallel Valve Cylinders. Issued May 2, 2019 - [SAIB NE-14-13](https://openairdocs.org/saib/NE-14-13): Reciprocating Engine - Cylinder Mounting Studs. Issued Mar 24, 2014 ## Registered aircraft (33) - [N10894](https://openairdocs.org/aircraft/N10894): [Holcomb Daniel F](https://openairdocs.org/faa-owner/HOLCOMB%20DANIEL%20F), [Galena, IL](https://openairdocs.org/faa-place/IL/Galena), S/N NAV42333B - [N10CJ](https://openairdocs.org/aircraft/N10CJ): [Zareefeh Christopher](https://openairdocs.org/faa-owner/ZAREEFEH%20CHRISTOPHER), [Fairbanks, AK](https://openairdocs.org/faa-place/AK/Fairbanks), built 1958, S/N 099 - [N1114V](https://openairdocs.org/aircraft/N1114V): [Eaa Aviation Foundation Inc](https://openairdocs.org/faa-owner/EAA%20AVIATION%20FOUNDATION%20INC), [Oshkosh, WI](https://openairdocs.org/faa-place/WI/Oshkosh), built 1950, S/N 154 - [N12620](https://openairdocs.org/aircraft/N12620): [Lapoint Paul E](https://openairdocs.org/faa-owner/LAPOINT%20PAUL%20E), [Drummond Island, MI](https://openairdocs.org/faa-place/MI/Drummond%20Island), built 1956, S/N 028 - [N173K](https://openairdocs.org/aircraft/N173K): [Wikle Artic C](https://openairdocs.org/faa-owner/WIKLE%20ARTIC%20C), [Wasilla, AK](https://openairdocs.org/faa-place/AK/Wasilla), S/N 074 - [N17481](https://openairdocs.org/aircraft/N17481): [Ball Fred E](https://openairdocs.org/faa-owner/BALL%20FRED%20E), [College Place, WA](https://openairdocs.org/faa-place/WA/College%20Place), built 1944, S/N 1360 - [N1916L](https://openairdocs.org/aircraft/N1916L): [Boeing Co](https://openairdocs.org/faa-owner/BOEING%20CO), [Renton, WA](https://openairdocs.org/faa-place/WA/Renton), built 1966, S/N 1A - [N19KD](https://openairdocs.org/aircraft/N19KD): [Flabob Airport LLC](https://openairdocs.org/faa-owner/FLABOB%20AIRPORT%20LLC), [Riverside, CA](https://openairdocs.org/faa-place/CA/Riverside), S/N 520-29 - [N289LM](https://openairdocs.org/aircraft/N289LM): [Hawkins Lynn A](https://openairdocs.org/faa-owner/HAWKINS%20LYNN%20A), [Franktown, CO](https://openairdocs.org/faa-place/CO/Franktown), built 1956, S/N 036 - [N29P](https://openairdocs.org/aircraft/N29P): [Navion West Inc](https://openairdocs.org/faa-owner/NAVION%20WEST%20INC), [Northridge, CA](https://openairdocs.org/faa-place/CA/Northridge), built 1951, S/N NAV-4-2320B - [N3539E](https://openairdocs.org/aircraft/N3539E): [Gordon Robert A Jr](https://openairdocs.org/faa-owner/GORDON%20ROBERT%20A%20JR), [North Pole, AK](https://openairdocs.org/faa-place/AK/North%20Pole), built 1958, S/N 50398 - [N3670B](https://openairdocs.org/aircraft/N3670B): [Aircraft Partner Holdings Inc Trustee](https://openairdocs.org/faa-owner/AIRCRAFT%20PARTNER%20HOLDINGS%20INC%20TRUSTEE), Berlin, built 1954, S/N CH-63 - [N4030](https://openairdocs.org/aircraft/N4030): [Rolanco Farms](https://openairdocs.org/faa-owner/ROLANCO%20FARMS), [Parker, AZ](https://openairdocs.org/faa-place/AZ/Parker), S/N 1 - [N4142B](https://openairdocs.org/aircraft/N4142B): [Knutson Wayne R](https://openairdocs.org/faa-owner/KNUTSON%20WAYNE%20R), [Tioga, ND](https://openairdocs.org/faa-place/ND/Tioga), built 1953, S/N 520-47 - [N4179B](https://openairdocs.org/aircraft/N4179B): [Mitchell Matthew K](https://openairdocs.org/faa-owner/MITCHELL%20MATTHEW%20K), [Cushing, OK](https://openairdocs.org/faa-place/OK/Cushing), built 1953, S/N 520-86 - [N4189B](https://openairdocs.org/aircraft/N4189B): [Kruger Thomas H](https://openairdocs.org/faa-owner/KRUGER%20THOMAS%20H), [Hoquiam, WA](https://openairdocs.org/faa-place/WA/Hoquiam), built 1953, S/N 520-96 - [N4195D](https://openairdocs.org/aircraft/N4195D): [Avian Air LLC](https://openairdocs.org/faa-owner/AVIAN%20AIR%20LLC), [Anchorage, AK](https://openairdocs.org/faa-place/AK/Anchorage), built 1962, S/N 1008 - [N4951K](https://openairdocs.org/aircraft/N4951K): [Supp Charles M](https://openairdocs.org/faa-owner/SUPP%20CHARLES%20M), [Wells, NV](https://openairdocs.org/faa-place/NV/Wells), built 1950, S/N 2148B - [N5162K](https://openairdocs.org/aircraft/N5162K): [Hensley Bradley S](https://openairdocs.org/faa-owner/HENSLEY%20BRADLEY%20S), [Lake Charles, LA](https://openairdocs.org/faa-place/LA/Lake%20Charles), S/N NAV-4-2062B - [N5356K](https://openairdocs.org/aircraft/N5356K): [Amped Aviation LLC](https://openairdocs.org/faa-owner/AMPED%20AVIATION%20LLC), [Philipsburg, MT](https://openairdocs.org/faa-place/MT/Philipsburg), S/N NAV-4-2256B - [N5376K](https://openairdocs.org/aircraft/N5376K): [Swett Frank M](https://openairdocs.org/faa-owner/SWETT%20FRANK%20M), [Zebulon, NC](https://openairdocs.org/faa-place/NC/Zebulon), built 1951, S/N NAV-4-2276-B - [N5406K](https://openairdocs.org/aircraft/N5406K): [Newcom Bradly C](https://openairdocs.org/faa-owner/NEWCOM%20BRADLY%20C), [Hanson, KY](https://openairdocs.org/faa-place/KY/Hanson), built 1950, S/N NAV-4-2306B - [N5418K](https://openairdocs.org/aircraft/N5418K): [Navion Element LLC](https://openairdocs.org/faa-owner/NAVION%20ELEMENT%20LLC), [Prior Lake, MN](https://openairdocs.org/faa-place/MN/Prior%20Lake), built 1951, S/N NAV-4-2318-B - [N5428K](https://openairdocs.org/aircraft/N5428K): [Tomlin Rollin D](https://openairdocs.org/faa-owner/TOMLIN%20ROLLIN%20D), [Wilmington, OH](https://openairdocs.org/faa-place/OH/Wilmington), S/N NAV-4-2328-B - [N680PJ](https://openairdocs.org/aircraft/N680PJ): [August Aero LLC](https://openairdocs.org/faa-owner/AUGUST%20AERO%20LLC), [Kalispell, MT](https://openairdocs.org/faa-place/MT/Kalispell), built 1968, S/N 10 - [N71Q](https://openairdocs.org/aircraft/N71Q): [Rutter David C](https://openairdocs.org/faa-owner/RUTTER%20DAVID%20C), [Downers Grove, IL](https://openairdocs.org/faa-place/IL/Downers%20Grove), built 1946, S/N 1441 - [N820LT](https://openairdocs.org/aircraft/N820LT): [Lance Toland Ltd](https://openairdocs.org/faa-owner/LANCE%20TOLAND%20LTD), [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington), built 1955, S/N A-820 - [N831AS](https://openairdocs.org/aircraft/N831AS): [Chmiel Edward C](https://openairdocs.org/faa-owner/CHMIEL%20EDWARD%20C), [Barrington, IL](https://openairdocs.org/faa-place/IL/Barrington), built 1958, S/N 469-18 - [N839A](https://openairdocs.org/aircraft/N839A): [Confederate Airforce Corp](https://openairdocs.org/faa-owner/CONFEDERATE%20AIRFORCE%20CORP), [Lewes, DE](https://openairdocs.org/faa-place/DE/Lewes), built 1958, S/N 477-26 - [N842JM](https://openairdocs.org/aircraft/N842JM): [Penngrove, CA](https://openairdocs.org/faa-place/CA/Penngrove), S/N 480-29, Registration pending - [N844A](https://openairdocs.org/aircraft/N844A): [Austin Bill DBA](https://openairdocs.org/faa-owner/AUSTIN%20BILL%20DBA), [Sparta, TN](https://openairdocs.org/faa-place/TN/Sparta), built 1956, S/N 326-8 - [N87LL](https://openairdocs.org/aircraft/N87LL): [Commemorative Air Force](https://openairdocs.org/faa-owner/COMMEMORATIVE%20AIR%20FORCE), [Dallas, TX](https://openairdocs.org/faa-place/TX/Dallas), built 1979, S/N S-1 - [N888W](https://openairdocs.org/aircraft/N888W): [Kennedy Craig D](https://openairdocs.org/faa-owner/KENNEDY%20CRAIG%20D), [Santee, CA](https://openairdocs.org/faa-place/CA/Santee), built 1956, S/N 029 ## NTSB investigations (26) 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 ANC19LA027](https://openairdocs.org/ntsb/ANC19LA027), Jun 12, 2019: Helio H391 (N10CJ), Hope, AK, substantial damage. Probable cause: The pilot’s failure to maintain directional control during a precautionary landing, which resulted in a ground loop. Contributing to the accident was a partial loss of engine power for reasons that… - [NTSB CEN10LA338](https://openairdocs.org/ntsb/CEN10LA338), Jun 20, 2010: Pilatus P3-05 (N831AS), Canby, MN, substantial damage. Probable cause: The North American's pilot's failure to maintain adequate visual lookout, which resulted in an on-ground collision with the Pilatus. - [NTSB IAD00FA044](https://openairdocs.org/ntsb/IAD00FA044), May 26, 2000: Kurzenburger Stuka JU-87 (N87DK), Urbana, MD, destroyed, 1 fatal. Probable cause: The pilot's failure to obtain/maintain aircraft control after takeoff. - [NTSB ANC95LA122](https://openairdocs.org/ntsb/ANC95LA122), Aug 1, 1995: Grumman G-44 (N17481), Kodiak, AK, substantial damage. Probable cause: OVERLOAD FAILURE OF THE MAIN LANDING GEAR WHEEL. - [NTSB ANC94LA007](https://openairdocs.org/ntsb/ANC94LA007), Oct 8, 1993: Helio H-391-B (N173K), Beaver Creek, AK, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN THE REQUIRED AIRSPEED DURING THE EMERGENCY DESCENT AS PUBLISHED IN THE PILOT'S MANUAL. A FACTOR IS THE LOSS OF ENGINE POWER FOR UNDETERMINED REASONS. - [NTSB LAX91LA144](https://openairdocs.org/ntsb/LAX91LA144), Mar 23, 1991: Helio H391B (N289LM), Prescott, AZ, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL AND IMPROPER USE OF THE FLIGHT CONTROLS. CONTRIBUTING TO THIS ACCIDENT WAS THE CROSS WIND AND SOFT TERRAIN, AND THE PILOT'S LACK OF EXPERIENCE IN… - [NTSB NYC90DGM03](https://openairdocs.org/ntsb/NYC90DGM03), Sep 28, 1990: Continental Copters MK5A (N9024T), Cranesville, PA, destroyed. Probable cause: THE PILOT'S INABILITY TO MAINTAIN CONTROL OF THE HELICOPTER AFTER THE LOSS OF A PORTION OF THE CYCLIC CONTROL ASSEMBLY; THIS RESULTED IN GROUND IMPACT AND POST-IMPACT FIRE. - [NTSB ANC88LA139](https://openairdocs.org/ntsb/ANC88LA139), Sep 11, 1988: Cessna 180B (N3539E), Fairbanks, AK, substantial damage - [NTSB ANC86LA159](https://openairdocs.org/ntsb/ANC86LA159), Sep 1, 1986: Cessna 180B (N3539E), Clear, AK, substantial damage - [NTSB ANC84LA171](https://openairdocs.org/ntsb/ANC84LA171), Aug 27, 1984: Helio H-395A (N4195D), Shellerbager Ps, AK, substantial damage - [NTSB CHI81FEP41](https://openairdocs.org/ntsb/CHI81FEP41), Aug 6, 1981: Dehavilland DHC-1 (N1114V), Mequon, WI, substantial damage - [NTSB ANC80FAA15](https://openairdocs.org/ntsb/ANC80FAA15), Jun 28, 1980: Helio Acft H-250 (N173K), Northway, AK, substantial damage - [NTSB MKC80DCJ03](https://openairdocs.org/ntsb/MKC80DCJ03), Nov 23, 1979: Navion B (N5177K), Norfolk, NE, substantial damage - [NTSB MIA78PKJ80](https://openairdocs.org/ntsb/MIA78PKJ80), Aug 20, 1978: Navion B (N5406K), Milton, FL, substantial damage - [NTSB DEN75FQA09](https://openairdocs.org/ntsb/DEN75FQA09), Jul 24, 1974: Navion A (N4951K), Aztec, NM, substantial damage - [NTSB MIA71FLA11](https://openairdocs.org/ntsb/MIA71FLA11), Aug 27, 1970: Ryan Navion (N5406K), Pensacola, FL, substantial damage - [NTSB MIA70DKJ49](https://openairdocs.org/ntsb/MIA70DKJ49), Jun 24, 1970: Aero Comdr 520 (N2136), Mobile, AL, substantial damage - [NTSB LAX70D0221](https://openairdocs.org/ntsb/LAX70D0221), Nov 23, 1969: Beech B50 (N3670B), Riverside, CA, substantial damage - [NTSB DIA69F0128](https://openairdocs.org/ntsb/DIA69F0128), Jan 7, 1969: Helio H-391B (N12620), Cumberland, MD, substantial damage - [NTSB SEA67F0233](https://openairdocs.org/ntsb/SEA67F0233), Dec 21, 1966: Navion B (N5351K), Hillsboro, OR, substantial damage - [NTSB FTW67A0028](https://openairdocs.org/ntsb/FTW67A0028), Sep 3, 1966: Hughes 269A (N8844F), Wylie, TX, substantial damage - [NTSB LAX67F0059](https://openairdocs.org/ntsb/LAX67F0059), Aug 2, 1966: Helio H-391B (N173K), Van Nuys, CA, substantial damage - [NTSB CHI67F0087](https://openairdocs.org/ntsb/CHI67F0087), Jun 28, 1966: Navion B (N29P), Marshall, WI, substantial damage - [NTSB UNK65X0610](https://openairdocs.org/ntsb/UNK65X0610), Nov 8, 1964: Aero Cmdr 520 (N4172B), Chicago, IL, substantial damage - [NTSB UNK65X0217](https://openairdocs.org/ntsb/UNK65X0217), Oct 10, 1964: Helio 391B (N173K), Perry, FL, substantial damage - [NTSB UNK64X4012](https://openairdocs.org/ntsb/UNK64X4012), Sep 16, 1964: Hughes 269A (N8844F), Santa Ana, CA, destroyed ## FAA accident and incident reports (21) 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 20190611006639A](https://openairdocs.org/incident/20190611006639A), Jun 11, 2019: Helio H-391B (N10CJ), Hope, AK, Substantial damage. On June 11, 2019, at 2230 AKDT, N10CJ, a Helio courier H391-B, was substantially damaged when the pilot attempted a precautionary landing at an unmaintained… - [Incident 20140819016059I](https://openairdocs.org/incident/20140819016059I), Aug 19, 2014: Helio H-395A (N4195D), Deadhorse, AK, Minor damage. Pilot was landing on a gravel bar 10 miles east of mile 40 on the dalton highway when after touchdown the left landing gear axle broke causing the left tire… - [Accident 20100620049582A](https://openairdocs.org/incident/20100620049582A), Jun 20, 2010: Pilatus P305 (N831AS), Canby, MN, Substantial damage. N831AS was ready to taxi. Sitting still. N8BP approached N831AS from the left rear quadrant and struck N831AS with the right main gear at the left wing tip.… - [Incident 20000723028399I](https://openairdocs.org/incident/20000723028399I), Jul 23, 2000: N831AS, Brainerd, MN, Minor damage. (-23)While conducting touch and go landing, the gear inadvertently retracted initiially touching down, causing a gear-up landing. Maintenance action following… - [Accident 20000526039259A](https://openairdocs.org/incident/20000526039259A), May 26, 2000: N87DK, Urbana, MD, No damage, 1 fatal. (-23)On climb-out the a/c appeared to go out of control crashing inverted into trees and burning on impact. - [Incident 19960407009699I](https://openairdocs.org/incident/19960407009699I), Apr 7, 1996: Gulstm 520 (N19KD), Riverside, CA. Narrative: on Sunday, April 7, 1996, barry s. gregory, PIC and owner of aero commander GA-520-520, N19KD, departed Riverside airport at 0820 to practice… - [Accident 19950731021079A](https://openairdocs.org/incident/19950731021079A), Jul 31, 1995: Gulstm G44 (N17481), Kodiak, AK, Substantial damage. Pilot reported ampibian lurched to right on takeoff. Aborted. Ground looped. Left wheel rim broken from overstress. - [Accident 19931007039779A](https://openairdocs.org/incident/19931007039779A), Oct 7, 1993: Helio H391B (N173K), Beaver Creek, AK, Substantial damage. Lost power en route. Crashed in a Creek trying for a sandbar. Too slow slats extended. Shortened glide. - [Incident 19930415011919I](https://openairdocs.org/incident/19930415011919I), Apr 15, 1993: Gulstm 520 (N19KD), Riverside, CA, Minor damage. Pilot retracted gear for possible go around. Go around not needed. Forgot to lower gear, landed gear up. - [Accident 19910323007469A](https://openairdocs.org/incident/19910323007469A), Mar 23, 1991: Helio H391B (N289LM), Prescott, AZ, Substantial damage. Lost directional control on takeoff roll. Veered into crosswind. Left runway and ground looped. - [Accident 19900823035379A](https://openairdocs.org/incident/19900823035379A), Aug 23, 1990: Ccoptr TOMCATMK5A (N9024T), Cranesville, PA, Destroyed. Crashed out of control on pullup from a swath run. Found bolt missing from cyclic control rod at swash plate. - [Accident 19880911038999A](https://openairdocs.org/incident/19880911038999A), Sep 11, 1988: Cessna 180B (N3539E), Fairbanks, AK, Substantial damage. Misjudged performance. Aborted too late and overran runway. Gusty wind, soft uphill strip, crosswind were factors. - [Accident 19860831045389A](https://openairdocs.org/incident/19860831045389A), Aug 31, 1986: Cessna 180B (N3539E), Clear, AK, Substantial damage. The pilot flew into the ground after losing visual references on a dusk approach to a clearing. - [Accident 19840827050829A](https://openairdocs.org/incident/19840827050829A), Aug 27, 1984: Helio H395A (N4195D), Shellerbager Pa, AK, Substantial damage. Wheel equipped Helio nosed over on landing on a snow covered runway. Snow was 18 to 30 inches deep. - [Accident 19810806050399A](https://openairdocs.org/incident/19810806050399A), Aug 6, 1981: Dhav DHC1 (N1114V), Mequon, WI, Substantial damage. Pilot's unsecured brief case moved reverse type mixture control to off. Unoticed by pilot who made forced landing. - [Incident 19810226021349I](https://openairdocs.org/incident/19810226021349I), Feb 26, 1981: Dhav DHC1 (N1114V), Indian Dunes, CA, Minor damage. Aircraft struck top of truck during film production. - [Accident 19800628023769A](https://openairdocs.org/incident/19800628023769A), Jun 28, 1980: Helio H391B (N173K), Northway, AK, Substantial damage. Unskilled in type. Tried to turn around on landing roll-out. Lost control. Ground-looped. - [Accident 19791123036949A](https://openairdocs.org/incident/19791123036949A), Nov 23, 1979: Tmpson NAVIONB (N5177K), Norfolk, NE, Substantial damage. Reported engine quit on takeoff. Landed in field beyond rwy. No engine defects. Found dirt in fuel. - [Incident 19780908018389I](https://openairdocs.org/incident/19780908018389I), Sep 8, 1978: Tmpson NAVIONB (N5376K), Fogelsville, PA. Forced landing due to deteriorating weather. No damage. - [Accident 19780820025759A](https://openairdocs.org/incident/19780820025759A), Aug 20, 1978: Navion NAVIOND (N5406K), Milton, FL, Substantial damage - [Accident 19740724023009A](https://openairdocs.org/incident/19740724023009A), Jul 24, 1974: Navion NAVIONB (N4951K), Aztec, NM, Substantial damage. Crashed shortly after takeoff. Witnesses observed acft in nose hi attitude. ## STCs that may be installed (OpenAirDocs) (23) 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 - [STC SE00825WI](https://openairdocs.org/stc/SE00825WI): Installation of Specialty Products Spin-on oil filter on Lycoming Engines. B & C Specialty Products Inc - [STC SE01954SE](https://openairdocs.org/stc/SE01954SE): Installation of engine crankcase seal. Ly-Con Rebuilding Company - [STC SE03309CH](https://openairdocs.org/stc/SE03309CH): Installation of Engine Preheat Kit, p/n TSP6CYL-2927-115 for 115 volt application. Hartzell Propeller Inc - [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 - [STC SE8628SW](https://openairdocs.org/stc/SE8628SW): Installation of oil nozzles for lubrication of cam and filters. Cygnet Aerospace Corp - [STC SE7507SW](https://openairdocs.org/stc/SE7507SW): Installation of any or all parts listed on Airmotive Engineering Drawing List No. 852-1, Rev. 1, dated 10/4/88, or later FAA approved revision. Continental Motors, Inc - [STC SE7664SW](https://openairdocs.org/stc/SE7664SW): Installation of parts listed on Airmotive Engineering Drawing List No. 8810-3, Revision No. 6, dated 11/3/89, or later FAA approved revision. Continental Motors, Inc - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc - [STC SE2902NM](https://openairdocs.org/stc/SE2902NM): Lycoming valve cover gasket. Real Gaskets Tennessee - [STC SE02436AT](https://openairdocs.org/stc/SE02436AT): Installation of 200F series fuel pump assembly. Kelly Aerospace Energy Systems LLC - [STC SE914NW](https://openairdocs.org/stc/SE914NW): Installation of a propeller governor adapter with a combination adapter/valve to provide propeller reversing control. McHugh Aviation Inc - [STC SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc - [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 - [STC SE09492SC](https://openairdocs.org/stc/SE09492SC): Installation and usage of Exxon 20W50 multigrade aircraft engine oil conforming to Exxon Oil formulation WS-3013. Exxon Company USA - [STC SE00350SE](https://openairdocs.org/stc/SE00350SE): Installation of sump mounted chip detector. Aviation Development Corporation - [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co - [STC SE452NE](https://openairdocs.org/stc/SE452NE): Installation and usage of 'Mobil AV 1' aviation oil. Mobil Research & Development Corp - [STC SE5879SW](https://openairdocs.org/stc/SE5879SW): Use of Phillips X/C II 20W-50 and25W-60 oil (OSS 55875) in all Avco reciprocating aircraft engines from 65 to 450 BHP. Phillips Petroleum Co - [STC SE5924SW](https://openairdocs.org/stc/SE5924SW): Installation of stainless steel replacement exhaust studs on AVCO engines. Perrigo & Steele Aircraft Engr Company - [STC SE1445SO](https://openairdocs.org/stc/SE1445SO): Use of Aero-blend oil additive in Teledyne (non turbocharged) aircraft engines. ProTec - [STC SE128NE](https://openairdocs.org/stc/SE128NE): Use of AMS/OIL 15W 50 synthetic piston aircraft oil in Avco engines. AMS/OIL - [STC SE44WE](https://openairdocs.org/stc/SE44WE): Use of Kling Aviation Oil, Specifications KL-100, KL-200 and KL-300 in Continental and Lycoming engines. Kling Oil Company --- 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.