# STC SH586EA

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Schweizer RSG LLC, United States
- Description: Installation of Hartzell Anti-Overspeed kits (D-3520-1 and D-3520-2)
- Applied: December 6, 1967
- Status date: January 25, 2018
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 4H12](https://openairdocs.org/tcds/4H12)
- Certificate PDF: https://openairdocs.org/files/sha256/0b/3d/0b3d8bf9d3a45a5b1afa6f75b065bafcda24867c1bef9ee547da73550cb8f710
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/88EF6FB2ADF9B7A386258249005E771A.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH586EA

## ADs that name it (0)

None.

## Approved models (4)

- Sikorsky Aircraft Corporation 269A ([TCDS 4H12](https://openairdocs.org/tcds/4H12))
- Sikorsky Aircraft Corporation 269A-1 ([TCDS 4H12](https://openairdocs.org/tcds/4H12))
- Sikorsky Aircraft Corporation 269B ([TCDS 4H12](https://openairdocs.org/tcds/4H12))
- Sikorsky Aircraft Corporation 269C ([TCDS 4H12](https://openairdocs.org/tcds/4H12))

## 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.

FAA Form 8110-2 (5/14) Page 1 of 2

Number: SH586EA

Part 6 of the Civil Air Regulations.

Original Product – Type Certificate Number: 4H12 Make: Sikorsky Aircraft Corporation Model: 269A, 269A-1, 269A-2, 269B, 269C

Installation of Hartzell Anti-Overspeed kits (D-3520-1and D-3520-2) in accordance with drawing No. D-3520, Revision M, dated September 25, 1972, or drawing No. C-3560 dated November 6, 1969 (Model 269A modified per Hughes Notice No. N-70 only), or later FAA approved revisions.

1. Applicable to Schweizer (“Hughes”) 269 Model helicopters equipped with Textron Lycoming HIO-360-A1A, HIO-360-B1B, or HIO-360-D1A engines. Aircraft Flight Manual Supplement dated February 8, 1968, revised January 27, 1969 and December 15, 1969, for Schweizer (“Hughes”) Models 269A and 269B, or Rotorcraft Flight Manual Supplement dated December 19, 1972 or later FAA approved revisions, for Schweizer (“Hughes”) Model 269C are required.

2. The installer must determine whether this design change is compatible with previously approved modifications.

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.

Date of Application: December 6, 1967 Date Reissued: July 22, 1998; June 28, 2001; March 24, 2014;

January 25, 2018 Date of Issuance: February 8, 1968 Date Amended: December 15, 1969; December 19, 1972

Signature

Title Kevin Dickert Manager, Boston ACO Branch, Compliance & Airworthiness Division Schweizer RSG LLC 3901 N. Main St.

Fort Worth, TX 76106

FAA Form 8110-2 (5/14) Page 2 of 2

Transfer the ownership of Supplemental Type Certificate Number: SH586EA

To (Name and address of transferee)

From (Name and address of grantor)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SH586EA

FAA Form 8110-2 (5/14) Page 3 of 3

## Every issue (3)

- January 25, 2018: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/0b/3d/0b3d8bf9d3a45a5b1afa6f75b065bafcda24867c1bef9ee547da73550cb8f710)
- March 24, 2014: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/01/94/0194ff83dec78e25ab6c3bf22639594d1c558b012363507c3a4a95876e7e5a7e)
- June 28, 2001: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/2b/71/2b715dd48df923b927b9cfa79fd349f4d3c3ef996dabd137333fe039d40eaf32)

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