# STC SR00465SE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Mechanical Specialties Inc, United States
- Description: Installation of a Mechanical Specialties Model 611 cargo hook
- Applied: April 4, 1997
- Status date: April 19, 2012
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 1H15](https://openairdocs.org/tcds/1H15)
- Certificate PDF: https://openairdocs.org/files/sha256/77/1f/771f734ad928aab00aa5f9160e204c53a611959f55d0d2e3a68af628a787645d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1E0BF405BDC5FAE5862579F200768971.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR00465SE

## ADs that name it (0)

None.

## Approved models (1)

- Sikorsky Aircraft Corporation S-61N ([TCDS 1H15](https://openairdocs.org/tcds/1H15))

## 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.

Number SR00465SE

This certificate, issued to Mechanical Specialties, LLC 1000 85th Avenue SE Olympia, WA 98501

Part 7 of the Civil Air Regulations, dated August 1, 1956, including Amendments 7-1 through 7-4. See Type Certificate Data Sheet 1H15 for other certification bases.

Original ProductType Certificate Number: 1H15 Make: Sikorsky Model: S-61N (Transport Category Only)

Description of the Type Design Change: Installation of a Mechanical Specialties, LLC Model 6111 cargo hook in accordance with a Federal Aviation Administration (FAA) approved copy of Mechanical Specialties, LLC Master Drawing List (MDL) No. 6111 MDL, Revision A, dated June 24, 1997, or later FAA-approved revision.

Limitations and Conditions: Approval of this change in type design applies to either the basic Sikorsky Model S-61N rotorcraft or to the “Shortsky” version with the fuselage shortened per Supplemental Type Certificate (STC) SR00283SE, previously equipped with a Helipro Model H9661N01-01 or H9661N01-03 logging utility system installed in accordance with STC SR00427SE, only. This approval should not be extended to rotorcraft of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that rotorcraft.

Rotorcraft altered to install these cargo sling systems must be operated in accordance with Helipro Rotorcraft Flight Manual Supplement (RFMS) Number 1, dated April 9, 1997, or later FAA-approved revision. The modified rotorcraft must be maintained in accordance with Mechanical Specialties, LLC Cargo Hook Maintenance Manual MSI-MNL002, Revision A, dated August 8, 1997, or latter FAA-approved revision. A copy of this certificate, FAA-approved Helipro RFMS, and Mechanical Specialties, LLC Maintenance Manual MSI-MNL002, must be maintained as part of the permanent records for the modified rotorcraft.

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.

Date of application: April 4, 1997 Date reissued: April 19, 2012 Date of issuance: August 13, 1997 Date amended:

(Signature)

Acting Manager, Seattle Aircraft Certification Office (Title)

## Every issue (2)

- April 19, 2012: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/77/1f/771f734ad928aab00aa5f9160e204c53a611959f55d0d2e3a68af628a787645d)
- August 13, 1997: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/6f/3c/6f3c509c3f5de146635e2aa778ed67192970f1cbc6bf857d31064c0864029aef)

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