# TCDS E-229: Lycoming Division AVCO Corporation

- Type: Type certificate data sheet
- Status: Current
- Holder: Lycoming Division AVCO Corporation
- Revision: 14
- Revised: January 31, 2020
- Product: Engine
- Certification basis: CAR 13
- Registered aircraft: 2,282, by the registry models matched to it (OpenAirDocs)
- Data sheet PDF: https://openairdocs.org/files/sha256/23/1c/231c98821436a232737462ffee32ff3769c43cb147fab8e38d21aec2f95e86ea
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2ACA0AABBB374F1F8625854D00382616.0001
- Page: https://openairdocs.org/tcds/E-229

## Models (10)

As the data sheet lists them.

- O-290-D2
- O-290-D
- O-290-B
- O-290-A
- O-290-CP
- O-290-AP
- O-290-D2A
- O-290-C
- O-290-D2C
- O-290-D2B

## What the data sheet says

From the PDF's text layer, line by line; tables lose their columns. The PDF is the record.

```text
Page No. 1 2 3 4 5 
Rev. No. 14 14 13 14 14 
 
DEPARTMENT OF TRANSPORTATION 
FEDERAL AVIATION ADMINISTRATION 
 
E-229 
Revision 14 
AVCO Lycoming 
0-290, -A, -AP, -B (0-290-1), 
-C (0-290-3), -CP, -D (0-290-11), 
-D2, -D2A, -D2B, -D2C 
 
January 31, 2020 
 
TYPE CERTIFICATE DATA SHEET NO. E-229 
 
Engines of models described herein conforming with this data sheet (which is a part of type certificate No. 229) and other 
approved data on file with the Federal Aviation Agency, meet the minimum standards for use in certificated aircraft in 
accordance with pertinent aircraft data sheets and applicable portions of the Civil Air Regulations provided they are installed, 
operated, and maintained as prescribed by the approved manufacturer's manuals and other approved instructions. 
 
Type certificate holder Lycoming Division 
 AVCO Corporation 
 Williamsport, Pennsylvania  17701 
 
Model      Lycoming 0-290 0-290-A, -AP 0-290-B 0-290-C, -CP 
Type 4H0A 
Direct Drive 
-  - 
-  - 
-  - 
-  - 
-  - 
-  - 
Rating     
  Max. continuous, hp., r.p.m.,     
    Sea level pressure altitude 125-2450-S.L. 125-2600-S.L. 125-2600-S.L. -  - 
  Takeoff,     
    hp., r.p.m. , at full throttle 125-2450 1250-2600 or 
130-2800 (5 min.) 
130-2800 (5 min.) -  - 
Fuel (Minimum grade aviation  
  gasoline)* 
 
73 
 
-  - 
 
-  - 
 
-  - 
Bore and stroke, in. 4.875 x 3.875 -  - -  - -  - 
Displacement, cu. in. 269 -  - -  - -  - 
Compression ratio 6.25:1 6.5:1 -  - -  - 
Weight (dry), lbs. 244 251 (with SR4L-8 or 
N-8 magnetos); 245 
(with N-20 or N-21 
magnetos) 
247 238 
C.G. location (dry)     
  Fwd. of mounting face, in. 7.0 — 7.0 -  - 
  From front face of rear propeller 
    mounting flange, in. 
 
— 
 
— 
 
— 
 
— 
  Off propeller shaft C.L., in. .3 (Above) — .2 .1 (Below) 
C.G. location (with all accessories)     
  Fwd. of mounting face, in. 5.1 4.7 — — 
  From front face of rear propeller  
    mounting flange, in. 
— — — — 
  Off propeller shaft C.L., in. .3 (Above) .6 (Below) — — 
Propeller shaft (see NOTE 4)     
  Integral flanged hub 8-3/8 bolts 
5-1/4 circle 
 
-  - 
 
-  - 
 
-  - 
  or SAE spline type No. 10 -  - -  - -  - 
Carburetion MA-3 MA-3SPA MA-3SPAA MA-3SPA 
 
"-  - indicates "same as preceding model." 
"—" indicates "does not apply." 
 * For alternate fuel grades, see latest revision of Lycoming Service Instruction 1070.

E-229 2 
 
Model      Lycoming        (cont'd) 0-290  0-290-A, -AP  0-290-B  0-290-C, -CP 
Ignition, Dual+ TCM● SF4L-8 or 
SF4LN-8 magnetos 
SF4L-8, SF4LN-8,  
-20 or -21 
SF4L-8 or SF4LN-8 -  - 
     
Ignition timing, °BTC 25 20 -  - -  - 
Spark plugs See NOTE 8 -  - -  - -  - 
Oil sump capacity, Qts. 8 -  - -  - -  - 
Usable oil sump capacity, Qts. 6 -  - -  - -  - 
     
NOTES 1,2,3,4,5,6,8 -  - -  - -  - 
     
Model      Lycoming 0-290D 0-290-D2, -D2A 0-290-D2B 0-290-D2C 
Type 4HOA 
Direct Drive 
-  - 
-  - 
-  - 
-  - 
-  - 
-  - 
Rating     
  Max. continuous, hp., r.p.m.,     
    Sea level pressure altitude 125-2600-S.L. 135-2600-S.L. -  - -  - 
  Takeoff,     
    hp., r.p.m. , at full throttle 130-2800 (5 min.) 140-2800 (5 min.) -  - -  - 
Fuel (Minimum grade aviation  
  gasoline)* 
 
80 
 
80/87 
 
-  - 
 
-  - 
Bore and stroke, in. 4.875 X 3.875 -  - -  - -  - 
Displacement, cu. in. 269 -  - -  - -  - 
Compression ratio 6.5:1 7.5:1 7.00:1 -  - 
Weight (dry), lbs. 230 233 (-D2)  
236 (-D2A) 
236 235 
C.G. location (dry)     
  Fwd. of mounting face, in. — — — — 
  From front face of rear propeller 
    mounting flange, in. 
 
15.1 
 
-  - 
 
-  - 
 
— 
  Off propeller shaft C.L., in. .7 
.1 (Right) 
-  - 
-  - 
-  - 
-  - 
— 
— 
C.G. location (with all accessories)     
  Fwd. of mounting face, in. — — — — 
  From front face of rear propeller  
    mounting flange, in. 
14.21 -  - — 14.21 
  Off propeller shaft C.L., in. 1.27 (Below) 
  .06 (Right) 
-  - 
-  - 
— 
— 
1.27 (Below) 
  .06 (Right) 
     
Propeller shaft (see NOTE 4)     
Integral flanged hub Flange type SAE 2 -  - -  - -  - 
  or SAE spline type No. — — — — 
Carburetion MA-3SPA -  - -  - -  - 
Ignition, Dual+ S4LN-20 (Right),  
S4LN-21 (Left) 
-  - 
 
-  - 
 
S4LN-204 
S4LN-200 
     
Ignition timing, °BTC 25 18 25 25 
Spark plugs See NOTE 8 -  - -  - -  - 
Oil sump capacity, Qts. 8 -  - -  - -  - 
Usable oil sump capacity, Qts. 6 -  - -  - -  - 
     
NOTES 1,2,3,4,5,8 1,2,3,4,5,6,7,8 1,2,3,4,5,7,8 -  - 
 
"-  - indicates "same as preceding model." 
"—" indicates "does not apply." 
* For alternate fuel grades, see latest revision of Lycoming Service Instruction 1070. 
● Teledyne (TCM formally Scintilla) 
+For alternate ignition systems, see latest revision of Lycoming Service Instruction 1443.

3 E-229 
CERTIFICATION BASIS 
  
 
Regulation & Amendments 
 
 
Model 
 
 
Date of Application 
Date Type Certificate 
No. 229 
Issued/Revised 
 CAR 13 Effective  
August 1, 1941 
 
 
 
 
 
As Amended by 13-1 
 
 
 
CAR 13 Effective March 5, 1952 
As Amended By 13-1 & 13-2 
CAR 13 Effective June 15, 1956 
  As amended by 13-1  
                          13-2 & 13-3 
 
0-290-A 
0-290 
0-290-C 
0-290-B 
0-290-AP, -CP 
0-290-D 
0-290-D2 
0-290-A,  
-AP, -B,  
-C, -CP 
0-290-D2A 
0-290-D2B 
0-290-D2A 
0-290-11 
0-290-D2C 
 
March 18, 1942 
June 15, 1942 
November 23, 1942 
November 28, 1942 
July 17, 1944 
July 22, 1949 
June 28, 1950 
 
 
 
March 31, 1953 
September 23, 1954 
 
December 6, 1957 
April 17, 1961 
 
July 27, 1942 
July 27, 1942 
January 22, 1943 
January 22, 1943 
July 21, 1944 
December 13, 1949 
May 1, 1952 
 
 
Canceled Nov 2, 1950 
April 20, 1953 
September 30, 1954 
Canceled July 5, 1956 
January 6, 1958 
May 8, 1961 
 
Production basis  Production Certificate No. 3 
 
NOTE 1. Maximum permissible temperatures are as follows: 
 
 
 
Model 
Cylinder head (Spark 
plug washer 
thermocouple) 
 
Cylinder head (Well-
type thermocouple) 
 
 
Cylinder barrel 
 
 
Oil Inlet 
0-290 only 
0-290-A, -AP, -B, -C, -CP 
0-290-D, -D2, -D2A,  
  -D2B, -D2C 
550°F 
525°F 
 
525°F 
525°F 
500°F 
 
500°F 
300°F 
325°F 
 
325°F 
200°F 
220°F 
 
245°F 
 
NOTE 2.  Minimum Maximum 
 Fuel pressure limits 0.5 p.s.i.     6.0 p.s.i. 
 Oil pressure limits  
  (Normal operation) 60 p.s.i.   90 p.s.i. 
  (Idling 25 p.s.i.) 
  (Starting and warm-up)  100 p.s.i. 
 
NOTE 3. Deleted.  Accessories such as generators, starters, fuel and vacuum pumps, etc. previously listed in NOTE 3 are 
satisfactory for continued use with these engines.  Accessories of these types are not integral engine accessories 
and therefore are not evaluated for approval during engine certification testing.  The airworthiness of such 
accessories is substantiated during aircraft-installation system approvals.  The suitability of the accessory to the 
engine mounting provisions as described in NOTE 4 of this data sheet must be determined when processing such 
approvals.

E-229 4 
NOTE 4. The following accessory drive provisions are available. 
 
 Engine Model      
 
 
 
Drive 
 
O-290, 
 -C, 
 -CP 
 
 
O-290-
A, -AP 
 
 
 
O-290-B 
 
O-290-D,  
-D2, -D2a,  
-D2b, -D2C 
*Direction 
of Rotation 
Facing 
Engine Pad 
 
Speed X 
Crankshaft 
RPM 
Maximum 
Torque 
  (in.  -lb.) 
Cont.    Static 
Maximum 
Overhang 
Moment 
(in. -lb.) 
          
Starter■ Yes  Yes  C 1.000:1 — 3000 80 
Starter■  Yes   C 13.500:1 — 240 150 
Starter■    Yes CC 13.556:1 — 450 150 
Generator■ Yes    CC 1.385:1 175 500 200 
Generator■  Yes   CC 1.500:1 30 65 175 
Generator■   Yes  C 1.250:1 175 500 200 
Generator■    Yes C 1.910:1 60 120 175 
Generator■  Yes C 2.500:1 60 120 175 
Tachometer Yes  Yes  C 0.500:1 20 60 5 
Tachometer  Yes  Yes C 0.500:1 7 50 5 
Fuel Pump Yes    C 1.000:1 50 450 10 
Fuel Pump  Yes  Yes Plunger 
Operated 
0.500:1 — — 10 
Vacuum Pump Yes    C 1.333:1 50 450 25 
Vacuum Pump  Yes   C 1.292:1 60 175 25 
Vacuum Pump   Yes  C 1.000:1 50 450 25 
Vacuum Pump    Yes CC 1.300:1 70 450 25 
Hydraulic Pump   Yes  C 1.333:1 50 450 25 
Fuel Pump    0-290-D2B,  
-D2C 
C 1.000:1 25 450 25 
Propeller Governor  
or  
Fuel Pump 
 
 0-290-D2A C 
 
C 
.866:1 
 
.866:1 
125 
 
125 
825 
 
825 
25 
 
25 
*C - Clockwise, CC - Counter-Clockwise 
■ These accessories are optional, see latest revision of Lycoming Service Instruction 1154 for the approved alternates. 
 
NOTE 5. The above engines incorporate the following detailed differences: 
 
 (a) Includes Model 0-290-A engine, Serial No. 107-6, with ratings, temperature limits, compression ratio, 
carburetor, and ignition timing the same as for Model 0-290. 
 (b) Serial No. suffix "S" identifies engines incorporating No. 10 spline crankshaft.  0-290-C engines, Nos. 
568-6 to 597-6 inclusive, originally incorporated the 6 bolt propeller flange.  Propellers having at least a 4-
3/4 in. thick hub are required with these crankshafts. 
 (c) Models 0-290-AP and 0-290-CP, similar respectively to Models 0-290-A and 0-290-C, incorporate 
provisions for absorbing the propeller thrust in both tractor and pusher type aircraft. 
 (d) Military Models 0-290-1, 0-290-3 and 0-290-11 are identical respectively to 0-290-B, 0-290-C and 
  0-290-D.  When they are installed in certificated aircraft, the corresponding commercial model designation 
and Type Certificate No. 229 should be added to the engine nameplate.   
 (e) Model 0-290-D similar to Model 0-235-C1 except for 0-290-A cylinder, piston and connecting rod 
assemblies, reinforced crankcase and crankshaft and is eligible for both tractor and pusher type 
installations. 
 (f) Model 0-290-D2 similar to Model 0-290-D except crankcase, higher compression ratio, hydraulic tappets, 
camshaft, intake valves and associated parts. 
 (g) Model 0-290-D2A similar to Model 0-290-D2 except has provisions for controllable propeller and 
propeller governor or alternate fuel pump. 
 (h) Model 0-290-C Serial No. 1446-6 has been modified in accordance with C.E. Wilson Drawing #2 to 
incorporate revised generator and magneto drive gears.  With this modification, the engine is restricted to 
125 hp. at 2600 r.p.m. for takeoff and maximum continuous. 
 (i) Model 0-290-D2B similar to 0-290-D2 except for compression ratio, ignition timing and propeller 
governor provisions. 
 (j) Model 0-290-D2C similar to 0-290-D2B except has retard breaker magnetos S4LN-204, -200.

5 E-229 
NOTE 6. The approvals for the following models have expired.  No engines of these models manufactured after the 
indicated date or with a higher Serial No. are eligible is certificated aircraft: 
 
  Model Serial No. Date 
 
  0-290 872-6 2-25-44 
  0-290-B 1448-6 7-10-45 
  0-290, -A, -AP, -C, -CP 2070-6 3-10-50 
  0-290-D2A 5720-21 10-15-53 
 
NOTE 7. Model 0-290-D2 is approved for horizontal mounted helicopter application at the following ratings: 
 
  Maximum continuous hp., r.p.m., 
   sea level pressure altitude  135-2600-S.L. 
  Takeoff hp., r.p.m., full throttle 135-2600 
 
NOTE 8. Spark Plugs: See latest revision of Lycoming Service Instruction No. 1042 for approved equipment. 
 
 
....END....
```

## ADs (11, in force first)

- [AD 2026-04-11](https://openairdocs.org/ad/2026-04-11): Engine (Reciprocating) · Lycoming Engines AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 605 more. Effective Apr 8, 2026
- [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 98-17-11](https://openairdocs.org/ad/98-17-11): Crankshafts · Continental Motors A-65-3, A-65-8, A75-8 and 90 more. Effective Oct 19, 1998
- [AD 98-01-06](https://openairdocs.org/ad/98-01-06): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Feb 13, 1998
- [AD 93-19-04](https://openairdocs.org/ad/93-19-04): Carburetors · Continental Motors A-65-1, A-65-12, A-65-12F and 184 more. Effective Oct 18, 1993
- [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
- [AD 75-08-09](https://openairdocs.org/ad/75-08-09): Oil Pump Drive Shaft · Lycoming Engines AEIO-360-A1B, AEIO-360-A1B6, AEIO-360-A1C and 365 more. Effective Aug 18, 1977
- [AD 66-06-03](https://openairdocs.org/ad/66-06-03): Connecting Rod Assemblies · Lycoming Engines GO-435-C2 (O-435-17), GO-435-C2A, GO-435-C2A2 and 317 more. Effective Jan 16, 1969
- [AD 54-02-01](https://openairdocs.org/ad/54-02-01): Magneto Timing · Textron Lycoming, AVCO O-290-D2
- [AD 81-18-04 R2](https://openairdocs.org/ad/81-18-04-R2) (historical): Engine Oil Pump Driven Impeller and Shaft · Textron Lycoming, AVCO AEIO-320-D1B, AEIO-320-D2B, AEIO-320-E1A and 376 more. Effective Jun 7, 1982

## Registered aircraft by registry model (OpenAirDocs)

- [Lycoming 0-290 series](https://openairdocs.org/engine/lycoming-0-290-series): 2,126 aircraft (registry code 41506)
- [Lycoming O-290-D2](https://openairdocs.org/engine/lycoming-o-290-d2): 58 aircraft (registry code 42090)
- [Lycoming O-290](https://openairdocs.org/engine/lycoming-o-290-series): 46 aircraft (registry code 42083)
- [Lycoming O-290-D](https://openairdocs.org/engine/lycoming-o-290-d): 45 aircraft (registry code 42089)
- [Lycoming O-290-D2B](https://openairdocs.org/engine/lycoming-o-290-d2b): 6 aircraft (registry code 42092)
- [Lycoming O-290-C](https://openairdocs.org/engine/lycoming-o-290-c): 1 aircraft (registry code 42087)
- [Lycoming O-290-A](https://openairdocs.org/engine/lycoming-o-290-a): 0 aircraft (registry code 42084)
- [Lycoming O-290-AP](https://openairdocs.org/engine/lycoming-o-290-ap): 0 aircraft (registry code 42085)
- [Lycoming O-290-B](https://openairdocs.org/engine/lycoming-o-290-b): 0 aircraft (registry code 42086)
- [Lycoming O-290-CP](https://openairdocs.org/engine/lycoming-o-290-cp): 0 aircraft (registry code 42088)
- [Lycoming O-290-D2A](https://openairdocs.org/engine/lycoming-o-290-d2a): 0 aircraft (registry code 42091)
- [Lycoming O-290-D2C](https://openairdocs.org/engine/lycoming-o-290-d2c): 0 aircraft (registry code 42093)

## STCs approved under this data sheet (34)

- [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 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
- [STC SE208SO](https://openairdocs.org/stc/SE208SO): Installation of ice indicator in the carburetor.. LegacySTC.com
- [STC SE04349CH](https://openairdocs.org/stc/SE04349CH): Installation of SureFly electronic ignition. SureFly Partners Ltd.
- [STC SE01954SE](https://openairdocs.org/stc/SE01954SE): Installation of engine crankcase seal.. Ly-Con Rebuilding Company
- [STC SE00939WI](https://openairdocs.org/stc/SE00939WI): Installation of B&C Specialty Products Model BC 315-( ) Starter on Lycoming engines.. B & C Specialty Products Inc.
- [STC SE2392CE](https://openairdocs.org/stc/SE2392CE): Installation of B&C Speciality Products lightweight (10.2 pounds) engine starter, part number BC-315-100-1 (12 volts)
or part number BC-315-100-3 (24 volts). B & C Specialty Products Inc.
- [STC SE03232CH](https://openairdocs.org/stc/SE03232CH): Installation of Engine Preheat Kit p/n TA2925-1 for 115 volt application. Hartzell Propeller Inc.
- [STC SE04577CH](https://openairdocs.org/stc/SE04577CH): Install an electronic engine ignition system. Electroair Acquisition Corp
- [STC SE8628SW](https://openairdocs.org/stc/SE8628SW): Installation of oil nozzles for lubrication of cam and filters.. Cygnet Aerospace Corp
- [STC SE8776SW](https://openairdocs.org/stc/SE8776SW): Installation of coated cylinders and piston rings.. Continental Motors, Inc.
- [STC SE00218NY](https://openairdocs.org/stc/SE00218NY): Replacement of Lycoming starter with SKY-TEC 12 volt starter installed.. Hartzell Engine Technologies, LLC
- [STC SE00226NY](https://openairdocs.org/stc/SE00226NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter Models 149-24HT and 122-24HT. Approval limited to 24-volt DC source available to the starter.. Hartzell Engine Technologies, LLC
- [STC SE00357NY](https://openairdocs.org/stc/SE00357NY): Replacement of Lycoming starter with SKY-TEC 24-volt starter installed.. Hartzell Engine Technologies, LLC
- [STC SE2901NM](https://openairdocs.org/stc/SE2901NM): Lycoming valve cover gasket. Real Gaskets Tennessee
- [STC SE01930NY](https://openairdocs.org/stc/SE01930NY): Installation of Casper Labs 90 degree oil filter housing adapter.. Casper Labs Inc
- [STC SE01943CH](https://openairdocs.org/stc/SE01943CH): Add the following approved fuels:  unleaded automotive gasoline 87 minimum antiknock index, per ASTM Specification D-439 or D-4814 of any volatility class, A through E, or 82UL AVGAS per ASTM D-6227.. Experimental Aircraft Association Inc.
- [STC SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc
- [STC SE5743NM](https://openairdocs.org/stc/SE5743NM): Intallation of adapter for externally mounted oil filter.. Aviation Development Corporation
- [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 SE5173NM](https://openairdocs.org/stc/SE5173NM): Installation of a replacement oil cooler adaptor, P/N ADC-310.. Aviation Development Corporation
- [STC SE8023SW](https://openairdocs.org/stc/SE8023SW): Installation and usage of AEROSHELL. Shell Development Co
- [STC SA2392CE](https://openairdocs.org/stc/SA2392CE): Installation of B & C Specialty Products.. Bainbridge William C III
- [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 SE2036CE](https://openairdocs.org/stc/SE2036CE): Add the following approved fuel: unleaded automotive gasoline, 87 minimum antiknock index, and leaded automotive gasoline, 88 minimum antiknock index(RON+MON)/2. Intermixing with aviation gasoline also approved.. Petersen Aviation Inc
- [STC SE80NE](https://openairdocs.org/stc/SE80NE): Installation and usage of Bel-Ray synthetic aviation oil, Bel-Ray Aero 1, (nonsupercharged), horizontally opposed direct drive, aircraft engines of 350 hp. or less.. Bel-Ray Company, Inc
- [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 SE5CE](https://openairdocs.org/stc/SE5CE): Prestolite ALK-5001 alternator.. Larsen Industries

---
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