# STC SA521WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Texas Transland LLC, United States
- Description: Swathmaster dust and spray attachment.
- Applied: September 9, 1963
- Status date: March 19, 2025
- Product: Aircraft, Small Airplane
- Data sheets: [TCDS 2A8](https://openairdocs.org/tcds/2A8), [TCDS 2A10](https://openairdocs.org/tcds/2A10)
- Certificate PDF: https://openairdocs.org/files/sha256/5f/98/5f98f8ea3cade39a5d9875f208d8834af68a0f9cab0612a96f76bf8a607946fa
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID191906903020260113144610.0001
- DRS record last changed: January 13, 2026
- Page: https://openairdocs.org/stc/SA521WE

## ADs that name it (0)

None.

## Approved models (2)

- Lavia Argentina S.A. (Laviasa) PA-25-235 ([TCDS 2A10](https://openairdocs.org/tcds/2A10))
- Lavia Argentina S.A. (Laviasa) PA-25-235 ([TCDS 2A8](https://openairdocs.org/tcds/2A8))

## 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. Never exceed speed Vne is 132 MPH.

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.

SA521WE Texas Transland, LLC 1206 Hatton Road Wichita Falls, TX 76302 Part 8 Civil Air Regulations 2A8 LAVIA S.A.

PA-25-235 Installation of Swathmaster (dust and spray attachment) per drawings listed on FAA sealed Drawing List Number 101.

September 9, 1963 January 16, 1975; March 19, 2025 September 27, 1963 January 3, 1964; February 28, 1966 for Manager, West Certification Branch

Page 2 of 2 FAA Form 8110-2 (03/21) SA521WE

## Every issue (1)

- March 19, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/5f/98/5f98f8ea3cade39a5d9875f208d8834af68a0f9cab0612a96f76bf8a607946fa)

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