# STC SR11869SE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Mechanical Specialties LLC, United States
- Description: Installation of Mechanical Specialties, LLC Human External Cargo (HEC) and non-HEC Hook System
- Applied: February 9, 2023
- Status date: March 5, 2025
- Product: Aircraft, Rotorcraft
- Certification basis: Part 27
- Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW)
- Certificate PDF: https://openairdocs.org/files/sha256/32/c5/32c5238c4d434c623dc63e21fc8d66e0cc0c315016d22d97cf490e7f26f99c81
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID146370848220250307183034.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR11869SE

## ADs that name it (0)

None.

## Approved models (1)

- Bell Helicopter Textron Canada Limited 407 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))

## 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.

SR11869SE Mechanical Specialties, LLC 1000 85th Ave SE Olympia, WA 98501 Part 27 Title 14 CFR H2SW Bell 407 Approval of this change in type design applies only to the rotorcraft listed above. The installation should not be incorporated on any aircraft unless it is determined that the interrelationship between this installation and any previously approved configuration of the aircraft will not introduce any adverse effect the airworthiness of the aircraft. (Continued on page 3.)

02/09/2023 03/05/2025 Installation of Mechanical Specialties, LLC Human External Cargo (HEC) and non-HEC Hook System in accordance with the Master Drawing List (MDL), Report No. 407-430-107, Revision 4, dated January 2, 2025, or a later approved revision. (Continued on Page 3)

SR11869SE

SR11869SE Description of Design Change (Continued from Page 1):

1. Maintained in accordance with the Instructions for Continued Airworthiness (ICA), document number 407-430-105, Revision 2, dated February 5, 2025 or later accepted revision.

2. Operated in accordance with Rotorcraft Flight Manual Supplement (RFMS), document number 407-430-110, Revision IR, dated December 31, 2024, or a later approved revision.

Limitations and Conditions (Continued from Page 1):

1. A copy of this certificate, the ICA, and the RFMS, must be maintained as part of the permanent records for the modified aircraft.

2. Operational approval for external load operations must be granted by the local Aviation Authority.

3. If the holder permits another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

-------------------------------------------------End--------------------------------------------------------------

## Every issue (1)

- March 5, 2025: Issued, Current. [certificate](https://openairdocs.org/files/sha256/32/c5/32c5238c4d434c623dc63e21fc8d66e0cc0c315016d22d97cf490e7f26f99c81)

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