# STC SA4-589

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Texas Transland LLC, United States
- Description: Installation of Swathmaster dispensing unit.
- Applied: July 1, 1958
- Status date: March 19, 2025
- Product: Aircraft, Small Airplane
- Data sheets: [TCDS A-743](https://openairdocs.org/tcds/A-743)
- Certificate PDF: https://openairdocs.org/files/sha256/2b/c9/2bc98b107f8797710b247b1ad889412c13c9b77b1eb409f43ad3fd2e775bcd38
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID125813704520260112163108.0001
- DRS record last changed: January 12, 2026
- Page: https://openairdocs.org/stc/SA4-589

## ADs that name it (0)

None.

## Approved models (12)

- The Boeing Company 75 (Army PT-13) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company A75 (Army PT-13A; -13B; -13C) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company A75J1 (Army PT-18) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company A75L3 ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company A75L300 ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company A75N1 (Army PT-17; -17A; Navy N2S-1; -4) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company B75 (Navy N2S-5) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company B75N1 (Navy N2S-3) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company D75N1 (Army PT-27) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company E75 (Army PT-13D; Navy N2S-5; PT-13D/N2S-5) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company E75N1 (Army PT-13D; Navy N2S-5; PT-13D/N2S-5) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- The Boeing Company IB75A ([TCDS A-743](https://openairdocs.org/tcds/A-743))

## 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.

This approval should not be extended to other specific airplanes of this model on which other previously approved modifications are incorporated unless it is determined the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane.

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.

dated October 11, 1950 SA4-589 Texas Transland, LLC 1206 Hatton Road Wichita Falls, TX 76302 Part 8 Civil Air Regulations A-743 Boeing 75 Series (Restricted Category Only) Installation of Swathmaster Dispensing Unit in accordance with Transland FAA Sealed Drawing List Number 103.

July 1, 1958 October 31, 1974; March 19, 2025 August 29, 1958 January 3, 1964; December 30, 1971 for Manager, West Certification Branch

Page 2 of 2 FAA Form 8110-2 (03/21) SA4-589

## Every issue (1)

- March 19, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2b/c9/2bc98b107f8797710b247b1ad889412c13c9b77b1eb409f43ad3fd2e775bcd38)

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