# TCDS ATC 111: 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/sha256/1d/7b/1d7be6ec873cba759a0bd54331b7f36470e78c1de78ed67b30a5c564201bb851
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FB894DECAB1DE9348525670E004E81A0.0001
- Page: https://openairdocs.org/tcds/ATC%20111

## Models (2)

As the data sheet lists them.

- R-680-B6
- R-680-6

## What the data sheet says

This is OCR from the scanned FAA data sheet. OCR can misread letters and numbers.

```text
MODELS: Avco Lycoming R-600-6, -B6
1-C. NUMBER:  ATC 111
Model  R-680-6, -B6
Tyre  9RA
Rating:
Maximum continuous,
hf, крт.  at S.I.
press.  alt.  225-2100-S.L.
Take-off  (one minute).
nE. Ipm. at full
throttle  245-2300
Fuel (minimum octane
aviation gasoline)  65
Bore and stroke, in.  4.625 x 4-500
Lisplacement, cu.  in.  680-4
Comfression ratio  5.5:1
weight  (dry)•  1bs-  471
Frofeller shaft.
SAE NO.  20
Carburetion  Stromberg NA-RTA carburetor with 2.0625 in. venturi
Ignition, dual  Scintilla SC-A or SC-AZ magneto
certification basis  Approved Type Certificate No. 111 (Exfired 3/14/39)
NOIEratio and 58  netanse fuel. numbers 6-1033 and 6-1182 eligitle with rating of 235 hp at 2300 rpm, 5.3:1 compression.
NOTE 2.  The R-680-B6 model engine may be converted to the R-680-B4 ty properly providing for the use of an
adjustable or fixed pitch propeller and by including the -B4 designation and ratings on the nam plate.
```

## ADs (5, 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 95-26-02](https://openairdocs.org/ad/95-26-02): Aviation Gasoline · Lycoming Engines IO-320-B1A, IO-320-B1B, IO-320-B1C and 182 more. Effective Jan 24, 1996
- [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 R-680-6](https://openairdocs.org/engine/lycoming-r-680-6): 0 aircraft (registry code 42374)
- [Lycoming R-680-B6](https://openairdocs.org/engine/lycoming-r-680-b6): 0 aircraft (registry code 42375)

## STCs approved under this data sheet (3)

- [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 SE2409CE](https://openairdocs.org/stc/SE2409CE): Add the following approved fuel: unleaded automotive gas, 87 minimum antiknock index and leaded automotive gas, 88 minimum antiknock index, (RON+MON)/2.. Petersen Aviation Inc
- [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

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