# TCDS ATC 31 Jacobs: Jacobs Aircraft Engine Co.

- Type: Type certificate data sheet
- Status: Current
- Holder: Jacobs Aircraft Engine Co.
- Revision: 0
- Product: Engine
- Data sheet PDF: https://openairdocs.org/files/sha256/5d/a9/5da91f9b27595ff8fc84f1db9f2fcb2ada53f3ca0808df5011be8c2cd14e38dd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7E613D13C8EED1A9862572C0006DEFD9.0001
- Page: https://openairdocs.org/tcds/ATC%2031%20Jacobs

## Models (1)

As the data sheet lists them.

- LA-1

## What the data sheet says

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

```text
JACOES AIRCRAFT ENGINE COMPANY
MCDEIS: JacoLs IA-1
I.C. NUMBER: AIC 31
Model  LA-1
туре  TRA
Fating:
Maximum continuous, hp,
ipm.  at 5.1. fressure
altitude  170-2125-5-1.
lake-cif (one minute).
Ipm, at full
thrcttle  170-2125
Fuel (minimum octane
aviation gasoline)  72
Fore and stroke, in.  4.50 × 4.75
Lisplacement, cu. in.  528.7
compression ratio  4.7:1
height (dry), 1bs.  389.25
Crankshaft  gearing  Direct drive
Supercharging  None
Carburetion  Stromberg NA-R=5
Ignition,  dual  Scintilla MN7-D magnetos
Certification basis  Approved Type Certificate No. 31
NOTE 1. weight (dry) does not include propeller hub.
NOTE 2.  AFFrovaL  expired 12/1/35.  No engines of this model manufactured after this date or with serial rumbers
atove  60 eligible  for use in certificated aircraft.
```

## ADs

None name its models.

## Registered aircraft by registry model (OpenAirDocs)

- [Jacobs LA1](https://openairdocs.org/engine/jacobs-la1): 0 aircraft (registry code 35001)

## 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

## PMA parts (OpenAirDocs) (1)

Current parts manufacturer approvals (PMA): parts the FAA has approved companies to make as replacements or modifications. Each record lists its models as free text; OpenAirDocs matched them to this data sheet's models, so check the FAA record before relying on it. Newest first.

- [No part number](https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID185216448520260722204350.0001): Swift Fuels, LLC · PMA PQ04423CE · For LA-1 · Jul 17, 2026

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