# TCDS TC 199: Textron Lycoming AVCO Corporation

- Type: Type certificate data sheet
- Status: Current
- Holder: Textron Lycoming AVCO Corporation
- Revision: 0
- Product: Engine
- Registered aircraft: 30, by the registry models matched to it (OpenAirDocs)
- Data sheet PDF: https://openairdocs.org/files/sha256/82/b2/82b2213a3e24496390f6c0be86b75d58e6aa567b0aa5c2800989de8c3334781f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BFF25C9BD83E1BD08525670E004CC0E4.0001
- Page: https://openairdocs.org/tcds/TC%20199

## Models (2)

As the data sheet lists them.

- O-145-A1
- O-145-A2

## 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-145-A1, -A2
T.C. NUMBER:  T.C. 199
Model O-145-A1 O-145-A2
Type 4HOA - - - -
Rating:
   Maximum continuous,
   hp, rpm, S.L.
   press. alt. 50-2300-S.L. 55-2300-S.L.
   Take-off, hp, rpm,
   at full throttle 50-2300 55-2300
Fuel (minimum octane
   aviation gasoline) 80 - - - -
Bore and stroke, in. 3.625 x 3.500 - - - -
Displacement, cu. in. 161.3 - - - -
Compression ratio 5.65: 1 - - - -
Weight (dry, lbs.) 150, 147 (with SF4LN-20 103, 157 (with SF4LN-20
   or -21 magneto)    or -21 magneto)
C.G. location (dry)
   Forward of rear
   mount C.L., in. 4.9 4.5
   Below shaft S.L., in. 1.5 1.6
Propeller shaft Integral flange, 6-3/8 in. - - - -
   circle
Carburetion Stromberg NA-S2 or - - - -
   NA-S2A with 1-1/8 in. venturi
   or Marvel MA-2, MA-2A or MA-3-A
   with 1.141 in. venturi
Ignition Single Dual
Magneto Scintilla SF-4 or Edison- - - - -
   Splitdorf RMA-6
Ignition timing,
   deg. BTC 28 20
Spark plugs PG 4B2, S; 417, 3; Champion - - - -
   AY4; LM-31, S; Edison-
   Splitdorf HC-83
Oil sump capacity,
   quarts 5 - - - -
Certification basis Type Certificate No. 199 (See NOTE 2)
NOTE 1.    Maximum permissible cylinder head, barrel and oil inlet temperatures, 525 degrees
   F., 325 degrees F., and 200 degrees F., respectively.
NOTE 2.    Approval expired 11/2/50.  No engines of these models manufactured after the dates
   shown below or with serial numbers of those indicated, are eligible for use in certificated
   aircraft:
   Model O-145-A1; Serial No. 4253 except 3532, 3552 and 3553; 8/1/41.
   Model O-145-A2; Serial No. 5915-2; 8/24/49.
NOTE 3.    The following accessories are eligible for use on the specified engine models at the
   indicated additional weights:

Fuel pump, AC Diaphragm type 3 lbs.
   AC Air Cleaner, Chevrolet Part No. 1529265 - - - -
```

## ADs (3, 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 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 0-145A series](https://openairdocs.org/engine/lycoming-0-145a-series): 30 aircraft (registry code 41501)
- [Lycoming O-145-A1](https://openairdocs.org/engine/lycoming-o-145-a1): 0 aircraft (registry code 42380)
- [Lycoming O-145-A2](https://openairdocs.org/engine/lycoming-o-145-a2): 0 aircraft (registry code 42381)

## 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 SE03232CH](https://openairdocs.org/stc/SE03232CH): Installation of Engine Preheat Kit p/n TA2925-1 for 115 volt application. Hartzell Propeller Inc.

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