# TCDS TC 5E-12: Textron Lycoming AVCO Corporation

- Type: Type certificate data sheet
- Status: Current
- Holder: Textron Lycoming AVCO Corporation
- Revision: 0
- Product: Engine
- Data sheet PDF: https://openairdocs.org/files/sha256/5e/b4/5eb48336994e405cf0c05a1f666b134bfb069444a386f4fd96a41677a2f6a6f6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/88A3C7D6485BC4FA8625681D006A3381.0001
- Page: https://openairdocs.org/tcds/TC%205E-12

## Models (1)

As the data sheet lists them.

- Military O-435-2-M1

## 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 Military O-435-2-M1
T.C. NUMBER:  5E-12
Model O-435-2-M1
Type 6HOA
Reduction gear ratio -642: 1
Rating:
   Maximum continuous,
   hp, rpm, in. Hg.,
   S.I. press. alt. 185-2800-24.8-S.L.
   Take-off, hp, rpm,
    at full throttle 235-3200
Fuel (minimum octane
   aviation gasoline) 91/98
Bore and stroke, in. 4.875 x 3.875
Displacement, cu. in. 434
Compression ratio 7.5: 1
Weight (dry), lbs. 405
C.G. location (dry)
   Forward of rear
   mounting face, in. 12.9
   Below propeller
   shaft C.L., in. 0.7
Propeller shaft,
   SAE No. 20
Carburetion Bendix PS-5C carburetor with 380123-1 setting
Ignition, dual Scintilla SF6LN-8 magneto
Ignition timing,
   deg. BTC 25
Spark plugs BG-RB-485S
Oil sump capacity,
   quarts 12
NOTE 1.    Maximum permissible cylinder head, barrel, and oil inlet temperature, 525 degrees
   F., and 220 degrees F., respectively.
NOTE 2.    Fuel pressure limits (psi) 9.0-15.0, oil pressure limits (psi) 60-80.
NOTE 3.    The following accessory drives are provided:
Drive Drive Ratio
Generator 1.25: 1
Starter 1: 1
Fuel Pump 1: 1
Vacuum or hydraulic pump 1.33: 1
NOTE 4.    Military O-435-2 engines bearing only serial numbers L00849-11 through L-1117-
   11, have six damper crankshafts and are eligible for this modification.  Other O-435-2 engines
   have four damper crankshafts and consequently are not eligible for this modification or
   approval.

NOTE 5.    When the modifications to Associated Aircraft Modification Company’s Drawing No.
   30350C is completed on eligible O-435-2 engines, (1) the designation “M1” is to be stamped
   after the model designation on the nameplate to read “O-435-2-M1” and (2) “CAA
   Specifications No. 5E-12” is to be stamped on the nameplate or on another plate permanently
   attached to the engine.
```

## 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

## 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 SA4005NM](https://openairdocs.org/stc/SA4005NM): Precise Flight Inc. Pulselite Control System. Precise Flight Inc

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