# STC SA4-497

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries, Inc, United States
- Description: Increase in flight speed - flaps extended.
- Applied: April 1, 1958
- Status date: December 1, 1999
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS LTC AL-13](https://openairdocs.org/tcds/LTC%20AL-13)
- Certificate PDF: https://openairdocs.org/files/sha256/43/4e/434e7e025cb0a8e0084f68b56911f261cca31b359cdcf58b5b4eaf049867362a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D5F9A7CD0D7EC21085256CC2000C5EC8.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4-497

## ADs that name it (0)

None.

## Approved models (1)

- Air Trading Corporation Navy PV-1 ([TCDS LTC AL-13](https://openairdocs.org/tcds/LTC%20AL-13))

## 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 5A1-497 This certificate issued to: Sierra Industries, Inc., a Texas Corporation Garner Field Road Uvalde, TX 78801 Part 9 of the Civil Aix Pegulations.

Original Product Type Cortificate Number: LTC-13 Make: Lockheed Aircraft Corp.

Model: PV-1 Description of Type Design Change:

Increase in flight speed - flaps extended.

1. Approval of this change applies basically to Lockheed PV-1 airplanes only.

2. Approval should be extended to other specific airplanes of this model on which other previously approved modifications are incorporated only after it is determined that the interrelationship between this change and any of those previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane.

3. Howard Aero, Inc. FAA Approved Airplane Flight Manual Supplement dated 1/25/60 required for Lockheed Super Ventura.

4. Supplement to Army Tech Order must be submitted to FAA Engineering for approval.

Date of Application: Apri1 01, 1958 Date Reissued: December 1, 1999 Date of Issuance: May 21, 1958 Date Amended: August 7, 1967 Revision 5 FEDERAL AVIATION By Direction of the Administrator Michela Maudley (Signature) Michele M. Owsley, Manager TOMINISTRATO Airplane Certification Office, Southwest Region (Title) 47

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ZIP code )

• from (Name of grantor) (Print or type) - (Address of grantor) (Number and streel) ( City, State, and ZIP code ) Extent of Authority (if licensing agreement):

Date of Transfer: _ Signature of grantor (In ink): _

## Every issue (1)

- December 1, 1999: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/43/4e/434e7e025cb0a8e0084f68b56911f261cca31b359cdcf58b5b4eaf049867362a)

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