# STC SR00427SE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Croman Corporation, United States
- Description: Fabrication and installation of a Helipro Model H9661N01-01, -03, -05, -07, -51, -53, -55, -57, -59 or -61 logging utility system
- Applied: January 26, 1997
- Status date: March 21, 2024
- Product: Aircraft, Rotorcraft
- Data sheets: [TCDS 1H15](https://openairdocs.org/tcds/1H15)
- Certificate PDF: https://openairdocs.org/files/sha256/03/2e/032e4c7de085f812fff4f269b47fd3717de1ba67df3b96614198a1b9477025be
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID195674166420240411135837.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SR00427SE

## 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.

SR00427SE Croman Corporation 801 Avenue C White City, Oregon 97501 7 the Civil Air Regulations 1H15 Sikorsky S-61N (Transport Category Only) Fabrication and installation of a Helipro model H9661N01-01, -03, -05, -07, -51, -53, -55, -57, -59 or -61 logging utility system in accordance with a FAA approved copy of McClenahan Engineering Master Drawing List No. DM9701-3, Revision C, dated November 30, 1998, or later FAA approved revision.

NOTE: The H9661N01-51, -53, -55, -57, -59 or -61 kit options may be installed in an aircraft separate from a cargo sling system, as a stand-alone installation.

Approval of this change in type design applies to either the basic Sikorsky Model S-61 N rotorcraft or to the "Shortsky" verison with the fuselage shortened per STC No. SR00283SE, only.

(See continunation sheet 3) January 26, 1997 March 21, 2024 April 9, 1997 December 4, 1998 for Christina Underwood Manager, East Certification Branch 3

SR00427SE 3

SR00427SE Limitation and Conditions: (continued) 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 other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that rotorcraft.

Rotorcraft altered to install the Helipro Model H9661N01-01, -03, -05, -07 cargo sling systems, must be operated in accordance with Helipro Rotorcraft Flight Manual Supplement (RFMS) No. 1, dated April 9, 1997, or later FAA approved revision.

NOTE: When a H9661N01-51, -53, -55, -57, -59, or -61 kit is installed as a stand-alone option, no RFMS is required. The modified rotorcraft must be maintained in accordance with Helipro Cargo Sling Maintenance Manual Report No. H6125-02, Revision A, dated November 23, 1998, or later FAA approved revision. A copy of this Certificate, FAA approved Helipro RFMS, and Maintenance Manual must be maintained as part of the permanent records for the modified rotorcraft.

Date Reissued: (continued) September 10, 2005 February 3, 2016 March 7, 2016

Date Amended: (continued) May 14, 1997

--------------------------------------- END -----------------------------------------

## Every issue (4)

- March 21, 2024: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/03/2e/032e4c7de085f812fff4f269b47fd3717de1ba67df3b96614198a1b9477025be)
- March 7, 2016: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/46/97/469704c87ba9cd7647becf51c5a060cf8c59ada2b6b512f319049549d23b017b)
- February 3, 2016: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/bc/9b/bc9bfd6238cbaa429cb355a8b71d5d4756e1b814066d5d0349a3965aa786afc9)
- December 4, 1998: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/9c/58/9c5817ce36df4d6ecfaaeb328044bc90e96a78895151d5fed7099df1a2c4ffa7)

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