# STC SA4-642

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Luscombe Aircraft Corporation, United States
- Description: Lycoming O-290-D2 engine and Sensenich M76AM-2 propeller.
- Applied: October 29, 1958
- Status date: February 26, 2021
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-694](https://openairdocs.org/tcds/A-694)
- Certificate PDF: https://openairdocs.org/files/sha256/3b/98/3b981aafb8ba9d4c50c164099c028d9b4daa86b627dd8e923bbd0a8763a0782f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/681B08E93A3370E9862587180050EF27.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-642

## ADs that name it (1)

- [AD 62-24-03](https://openairdocs.org/ad/62-24-03): Cabin Heat System · Lycoming O-235-C1, O-235-C2C, O-290-D, O-290-D2, O-320 engine (Luscombe STC SA4-173 or 5 others). Effective Nov 21, 1962. Named in the applicability

## Approved models (1)

- Luscombe Aircraft Corporation 8E ([TCDS A-694](https://openairdocs.org/tcds/A-694))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Number SA4-642

This certificate issued to: Luscombe Aircraft Corporation 3301 Turner Road Jamestown, New York 14701

4a of the Civil Air Regulations..

Original Product – Type Certificate Number: A-694 Make: Luscombe Model: 8E

Description of Type Design Change: Installation of a Lycoming O-290-D2 engine and Sensenich M76AM-2 propeller. (In accordance with McKenzie Aircraft Repair Installation Instructions as revised November 6, 1979, or later FAA approved revision).

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only.

This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this STC must be maintained as part of the permanent records of the modified aircraft. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of Application: October 29, 1958 Date Reissued: February 29, 1996;

(Continued on page 3)

Date of Issuance: October 29, 1956 Date Amended: October 15, 1962; March 27, 1969 By Direction of the Administrator

Title: Manager, Technical & Administrative Support Section Aviation Safety Los Angeles ACO Branch

Number: SA4-642

(Continuation Sheet) Number: SA4-642 (Continued from Page 1)

Date Reissued: August 2, 2001; November 14, 2019; February 26, 2021

POWER PLANT LIMITATIONS:

Engine: Lycoming O-290-D2 (for all operations) -2600 RPM (135 H.P.)

Fuel: 80/87 Minimum Octane Aviation Gasoline

Propeller:

Sensenich M76AM-2 Diameter: Maximum 74 inches; Minimum 72.5 inches Static RPM: Maximum 2250; Minimum 2050

Power Plant Instruments:

Tachometer: 2600 RPM (Red Line) Oil Temperature: 245 F (Red Line) Oil Pressure:

Minimum idle: 25 psi (Red Line); 25-60 psi (Yellow Arc); 60-85 psi (Green Arc) Normal Operating Range: 85 psi (Red Line Max)

------END-----

## Every issue (3)

- February 26, 2021: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/3b/98/3b981aafb8ba9d4c50c164099c028d9b4daa86b627dd8e923bbd0a8763a0782f)
- November 14, 2019: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/65/b8/65b825481e13de177017d3757f959365a44f1d6a43e545e6b6185410134021fd)
- August 2, 2001: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/1e/14/1e147e3642c4ee835e45703ce11457e6ddefb0450179b71f03453ddefa2679a0)

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