# STC SA1529SW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: A D Howard Jr, United States
- Description: Modification of hydraulic system and air conditioning pressurization system.
- Applied: August 23, 1972
- Status date: July 25, 1973
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- Certificate PDF: https://openairdocs.org/files/sha256/40/b8/40b8d6f30a7ea79471386e984c74b4d3c490fad4a3fd366e973065424dcdf24a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1AAEC17AECCB02E485256CC1008212B5.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1529SW

## ADs that name it (0)

None.

## Approved models (2)

- Twin Commander Aircraft LLC 680-V ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 680-W ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

## 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.

United Stares of amtrica ©epartment of Transportation — federal 2toiation administration upplemental t^pe Certificate tyutmV€W SA1529SW A. D. Hovard Jr.

6817 NW 43rd St.

Bethany, Oklahoma 73008 Project A2423SW-S JDL-213 Civil Air

•slea<tta/it>-n&.

2A4 . 680V, 680 W : Hodification of hydraulic system and air conditioning pressurization system per Ali-lAR Engineering Company Drawing Li at MDL61600 Revision E dated 7/25/73.

FM Approved Airplane Flight Manual Supplement dated October 27, 1972, is required for Rock^ell Model 680V and Supplement dated October 27, 1972, for Model 680W.

STC 3A15303W is required with this modification.

August 23, 1972 July 25, 1973 a: -d far (Signature I Glen W. Welsh Chief, Engineering and Manufacturing Branch ~ ... (T'tltJ'

This certificate rnaj> bt tiamferred in accordance with FAR 21,47.

**FAAFOIMBI 10-2(10-48)**

X^ ji I NS I RljC'I IONS '['he iriinsfi-r endorsement below may he used lo notify ihe appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

Thr FAA will reissue ihr certificate m the name of the transferee and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transffree ) (Address of transferee) '. •' •• - » umbei and stiett) (Citji.Statt, and QP cuib) from (Name of grantor) (Print or type) (Address of grantor) (Nuirtbtr and ftiftt} ity, Stale, and Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

\ C FAA AC 69-5336

## Every issue (1)

- July 25, 1973: Issued, Current. [certificate](https://openairdocs.org/files/sha256/40/b8/40b8d6f30a7ea79471386e984c74b4d3c490fad4a3fd366e973065424dcdf24a)

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