# STC SA1490NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aerobase Inc, United States
- Description: Installation of two Wright R1820-76B engines (per Aircraft Specification A-723, Note 12) on an aircraft previously modified by STC SA4-69
- Applied: March 30, 1982
- Status date: April 2, 1982
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-723](https://openairdocs.org/tcds/A-723)
- Certificate PDF: https://openairdocs.org/files/sha256/15/cc/15ccdc9f53ea080dd102018c243c1839ca6c58a5919acf9eeed88afeeba04932
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/37CC88C199CA1C2D86257A140071B807.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1490NM

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Aircraft Corporation 18 ([TCDS A-723](https://openairdocs.org/tcds/A-723))

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA1490NM This certificate issued to: Aerobase InC.

Purt 4a s/ the CiVil Air Ruyulations, and SR-407.

Original Product -TypebertificateNumber: A-723, Including Note 12 Make: Lockheed "Learstar" Model: 18 Description of Type Design Change: Installation of two Wright R1820-76B engines (per Aircraft Specification A-723, Note 12) on an aircraft previously modified by STC SA4-69. Installation done in accordance with Aerobase Photographs 1 through 4.

Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Lockheed "Learstar", Serial Number 2472 only. A copy of this Certificate, CAA Approved Learstar Airplane Flight Manual dated January 21, 1955, and FAA Approved Airplane Flight Manual Supplement dated April 2, 1982 must be maintained as part of the permanent records for the modified aircraft.

This certificate and the supporting data which is the basis for approval shall remain in effect until sur rendered, suspended, rovked, or a termination date is thorwise istablished by the Sidministrator of the Federal Aviation Administration Date of Application: March 30, 1982 Date Reissued:

Date of Issuance: April 2, 1982 Late amendul:

By directing of the Ilmenistraler (Signature) TOMINIS TRANSI Chief, Seattle Area Aircraft Certification Office (Title )

## Every issue (1)

- April 2, 1982: Issued, Current. [certificate](https://openairdocs.org/files/sha256/15/cc/15ccdc9f53ea080dd102018c243c1839ca6c58a5919acf9eeed88afeeba04932)

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