# STC SR02254LA

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of stability augmentation system and autopilot
- Applied: October 14, 2002
- Status date: April 15, 2021
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21, Part 27
- Data sheets: [TCDS H11NM](https://openairdocs.org/tcds/H11NM)
- Certificate PDF: https://openairdocs.org/files/sha256/67/dd/67dda027880a490bc842eee0616ee3be06f1404885cc22d735cdf3b0c1a48d32
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A9535A8A5C87C9F4862586C6006E46A5.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SR02254LA

## ADs that name it (0)

None.

## Approved models (2)

- Robinson Helicopter Company R44 ([TCDS H11NM](https://openairdocs.org/tcds/H11NM))
- Robinson Helicopter Company R44 II ([TCDS H11NM](https://openairdocs.org/tcds/H11NM))

## 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.

SR02254LA S-TEC Corporation One S-TEC Way Mineral Wells, TX 76067-9236 27 Code of Federal Regulations H11NM Robinson Helicopter Company R44 and R44 II

1. Installation of a HeliSAS Stability Augmentation System / Autopilot, in accordance with Master Data List HeliSAS-026, Revision P, dated 4-12-21 or later FAA approved revision.

2. Rotorcraft Flight Manual Supplement ST-931-RFMS-0002, Rev. -, dated 4-15-21, or later FAA approved revision is required.

3. Instructions for Continued Airworthiness ST-931-ICA-0001, Rev. B dated 1-21-16, or later FAA approved revision is required.

1. This STC is applicable to all serial numbers for Robinson Helicopter models R44 and R44 II.

2. The installer must determine whether this design change is compatible with previously approved modification. (See continuation sheet 3) October 14, 2002 July 24, 1014; December 19, 2016 October 30, 2009 November 12, 2014; October 27, 2016, April 15, 2021 Lead ODA administrator 3

SR02254LA 3

SR02254LA

3. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

4. Certification Basis: Compliance determination used for this STC.

FAR 27.141 Amdt 27-21 FAR 27.601 Amdt 27-0 FAR 27.143(a) Amdt 27-21 FAR 27.603 Amdt 27-16 FAR 27.131(a)(b) Amdt 27-21 FAR 27.605(a) Amdt 27-16 FAR 27.161 Amdt 27-21 FAR 27.609(a)(b) Amdt 27-0 FAR 27.171 Amdt 27-0 FAR 27.613 Amdt 27-16 FAR 27.301 Amdt 27-0 FAR 27.671 Amdt 27-0 FAR 27.303 Amdt 27-0 FAR 27.1301 Amdt 27-0 FAR 27.305(a)(b) Amdt 27-0 FAR 27.1322(c)(d) Amdt 27-11 FAR 27.307 Amdt 27-0 FAR 27.1329 Amdt 27-21 FAR 27.561 Amdt 27-0 FAR 27.1629 Amdt 27-0 Special Condition 27-033-SC

END

4-15-21 3 3

## Every issue (5)

- April 15, 2021: Amended, Current. [certificate](https://openairdocs.org/files/sha256/67/dd/67dda027880a490bc842eee0616ee3be06f1404885cc22d735cdf3b0c1a48d32)
- October 27, 2016: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/1b/40/1b4096fedc3225f402fba2d8462766893cd455ef443f948cfd9113df8aa4005d)
- November 12, 2014: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/72/57/7257b7b7ee3c97f2ecf76eb6fdc80bd90e7bbe76473fb7f048395649460509b4)
- July 24, 2014: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/e4/2d/e42d2bc25145561e2a1bf68aa1989241f0e305ea368254a25ed2e79a0a897f13)
- October 30, 2009: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/61/b6/61b62e87ee862df9dc9b241a580102d1a1648f6afa91f868c6b4072305a1f616)

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