# TCDS TC 227: Textron Lycoming AVCO Corporation

- Type: Type certificate data sheet
- Status: Current
- Holder: Textron Lycoming AVCO Corporation
- Revision: 0
- Product: Engine
- Registered aircraft: 18, by the registry models matched to it (OpenAirDocs)
- Data sheet PDF: https://openairdocs.org/files/sha256/b4/24/b4240f4ebb3e8200a6a9ee6355850c587694c471ca03941c75cc64a71a2c63f3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4D248C7E4E9D9DC48525670E004EDCC3.0001
- Page: https://openairdocs.org/tcds/TC%20227

## Models (2)

As the data sheet lists them.

- O-350-A
- O-350

## What the data sheet says

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

```text
AVCO CORPORATION, LYCOMING DIVISION
MODELS:  Avco Lycoming O-350, 0-350-A
T.C. NUMBER:  T.C. 227
Model Lycoming O-350, -A
Type 6HOA
Rating:
   Maximum continuous,
   hp, rpm, S.L.
   press. alt. 150-2500-S.L.
   Take-off, hp, rpm,
   at full throttle 150-2500
Fuel (minimum octane
   aviation gasoline) 73
Bore and stroke, in. 4.375 to 3.875
Displacement, cu. in. 350
Compression ratio 6.25: 1
Weight (dry), lbs. 341, 347
Propeller shaft,
   SAE No. 20
Carburetion Marvel MA-3 carburetor with 1-5/8 in. venturi
Ignition, dual Scintilla SF6L-8, or Edison-Splitdorf Type RMA with
    impulse coupling
Ignition timing,
   deg. BTC 25
Oil sump capacity,
   quarts 12
Certification basis Type Certificate No. 227 (Expired 5/11/45)
NOTE 1.    Maximum permissible cylinder head, barrel and oil inlet temperatures, 545 degrees
F., 310 degrees F., and 230 degrees F., respectively.
NOTE 2.    Model  O-350-A, essentially similar to model O-350, incorporates a modified
accessories case which includes generator and starter drives.
NOTE 3.    The following accessories are eligible for use on the specified engine models at the
indicated additional weights:
Optional Accessories Weight (lbs.) (Drives Engine Models
   included except where noted) O-350   O-350-A
Generator:
   Eclipse Type 307, Model 8 16 Yes
   Delco-Remy Model 1106704
   (not including drive weight) 10 Yes
Starter:
   Eclipse Type 397, Model 54 18 Yes
   Delco-Remy starter Model 1109652
   (not including drive weight) 16 Yes
Fuel Pump:
   Pesco Model 227-C  2 Yes
   A-C Model GP-8897, Type AH  3 Yes
Vacuum Pump:
   Pesco Type B-2A, Model 194  4 Yes Yes
   Radio Shielding  3 Yes Yes
```

## ADs (4, in force first)

- [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 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 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

## Registered aircraft by registry model (OpenAirDocs)

- [Lycoming 0-350 series](https://openairdocs.org/engine/lycoming-0-350-series): 17 aircraft (registry code 41512)
- [Lycoming O-350](https://openairdocs.org/engine/lycoming-o-350): 1 aircraft (registry code 42387)
- [Lycoming O-350-A](https://openairdocs.org/engine/lycoming-o-350-a): 0 aircraft (registry code 42388)

## STCs approved under this data sheet (2)

- [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 SE1779NM](https://openairdocs.org/stc/SE1779NM): Installation of Precise Flight, Inc. Standby Vacuum System SVS III. Precise Flight Inc

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