# TCDS TC 172: 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/sha256/7c/fd/7cfd17bdf487963e91f7a9838e24edfcf309e04cf476d6a0c1ecb9bad477c7e1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/ECAB4D5FF661294E8525670E004E9BFE.0001
- Page: https://openairdocs.org/tcds/TC%20172

## Models (1)

As the data sheet lists them.

- R-680-D5

## 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-680-D5
I.C. NUMPER: I.C. 172
Model  R-680-D5
туре  9RA
kating:
Maximum continuous,
Df. Ipm.  at S.L.
Fress.  alt.  245-2100-S.L.
Take-off (one minute).
rEm, at full
throttle  260-2300
Fuel (minimum octane
aviation gasoline)  80
Fore and stroke, in.  4.625 × 4.5
Cisplacenent, cu. in.  680-4
Corfression ratio  6-5:1
weight (dry) .  Ibs.  516
Fropeller shaft,
SAE NO.
Carturetion  Stromberg NA-F7A carburetor with 2-1/16 in. venturi
Ignition,  dual  Scintilla  SC-A2 magneto
Certification tasis  Type Certificate No. 172 (See NOTE 3)
NOTE 1. Eligible with constant speed propeller drive with increase in weight of 2 Ibs-
NOTE 2.  Maximum permissible cylinder head, barrel and oil inlet temperatures, 525 degrees F.. 300 legrees F.. ard
200 degrees F., respectively.
NOTE 3.  Approval expired 11/2/50.  No engines manufactured after 12/15/40 or with serial number above 1475 eligitle
for use  in certificated  aircraft.
```

## 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-D5](https://openairdocs.org/engine/lycoming-r-680-d5): 0 aircraft (registry code 42376)

## STCs approved under this data sheet (1)

- [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

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