# Jacobs R-755 series - Type: Engine model (FAA registry) - Registry code: 35031 - Manufacturer (registry): JACOBS - Model: R-755 - Engine type: Reciprocating - Power: 225 hp - Installed in: 1 registered aircraft - Page: https://openairdocs.org/engine/jacobs-r-755-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 (1) - [N7422X](https://openairdocs.org/aircraft/N7422X): [Macvey Troy R](https://openairdocs.org/faa-owner/MACVEY%20TROY%20R), [Milan, IN](https://openairdocs.org/faa-place/IN/Milan), built 1949, S/N 7422 ## NTSB investigations (1) 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 UNK64X2912](https://openairdocs.org/ntsb/UNK64X2912), Jul 19, 1964: Grumman G164 (N10234), Holland, MI, destroyed ## FAA accident and incident reports (2) 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. - [Incident 20151014016719I](https://openairdocs.org/incident/20151014016719I), Oct 14, 2015: Cessna 195B (N7422X), Bedford, KY, Minor damage. The pilot stated that this flight was a personal pleasure flight. Upon initiating the departure from the Ohio river, the aircraft began to deccelerate and lean… - [Accident 20040912021099A](https://openairdocs.org/incident/20040912021099A), Sep 12, 2004: Cessna 172B (N7422X), Woolwich, ME, Substantial damage. (-23) At 1330 hrs. LCL, on 9/12/04, at approximately 1200 ft MSL, the pilot and passenger heard a loud rapping noise. They checked the oil pressure and found… ## Service difficulty reports (1) As reported by operators and repair stations, by the model named in the report. - [SDR 2001FA0000163](https://openairdocs.org/sdr/2001FA0000163), Aug 3, 2001: STUD. BROKEN. FOUND BROKEN CYLINDER BASE STUD ON NR 4 CYLINDER. AFTER REMOVING BROKEN STUD, FOUND TWO OTHERS BENT, SENT STUDS FOR EVALUATION TO SEE IF THEY MET DESIGN INTENT. ## STCs that may be installed (OpenAirDocs) (13) 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 SE4842NM](https://openairdocs.org/stc/SE4842NM): Installation of auxiliary oil sump tank. The 195 Factory LLC. Lists R-755A2 - [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 R-755A1 - [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 R-755A1 - [STC SE572SW](https://openairdocs.org/stc/SE572SW): Installation of Jacobs RAS325A exhaust valve rotocaps. Air Repair Inc. Lists R-755A1 - [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings. Continental Motors, Inc. Lists R-755A Series - [STC SE04136AT](https://openairdocs.org/stc/SE04136AT): Installation of Bendix Scintilla WL-7A Battery Ignition Timer (distributor) modified from a breaker points and condenser design to a Hall Effect electronic sensor design. Air Repair Inc. Lists R-755A1 - [STC SE00809WI](https://openairdocs.org/stc/SE00809WI): Installation of a modified alternate source of supply, engine ignition coil assembly and condenser. Air Repair Inc. Lists R-755A2 - [STC SE01652WI](https://openairdocs.org/stc/SE01652WI): Modification of engine to replace contact points and condenser controlled Bendix Scintilla WL-7A battery timer (distributor) with an electronically controlled WL-7A-M battery timer. Radial Engines Ltd. Lists R-755A1 - [STC SE01288WI](https://openairdocs.org/stc/SE01288WI): Modification of Engines to replace carburetor with fuel injection. Data required: (1) Butterfly Aviation Master Drawing List Report BA1001-11, dated October 28, 2004, and (2) Butterfly Aviation Instructions for Continued Airworthiness Report BA1001-8, dated October 26, 2004, or later FAA Approved revisions to (1) or (2). Radial Engines Ltd. Lists R-755A2 - [STC SE01243WI](https://openairdocs.org/stc/SE01243WI): Installation of Barron Aviation intake tube drain kits on the engines listed on the attached FAA Approved Model List (AML) No. SE01243WI, dated April 26, 2004, or later FAA Approved revision. Barron Aviation. Lists R-755A1 - [STC SE02589AT](https://openairdocs.org/stc/SE02589AT): Installation of Air Repair, Inc. magneto part numbers VMN7-DF5-ARMOD with automatic advance per Air Repair, Inc. Installation Instructions, document number 1200C, dated 9/5/2002 or lter FAA approved revision. The VMN7-DF5-ARMOD magnetos are obtained from Bendix VMN7-DF5 or VMN7-DFA magnetos modified per Air Repair, Inc. Service Instructions, document number 1200A dtd 9/5/02 or other FAA approved revision. Air Repair Inc. Lists R-755A2 - [STC SE2416CE](https://openairdocs.org/stc/SE2416CE): Add the following approved fuel: unleaded automotive gasoline 87 minimum antiknock index and leaded automotive index(RON+MON)/2. Petersen Aviation Inc. Lists R-755A1 - [STC SE639SW](https://openairdocs.org/stc/SE639SW): Continental W-670 link rods. Aircraft Engine Service Inc. Lists R-755A Series --- 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.