# STC SR11409DS

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Airbus Helicopters Inc., United States
- Description: Installation of a TDFM Communication System
- Applied: February 23, 2026
- Status date: September 17, 2026
- Product: Aircraft, Rotorcraft
- Certification basis: Part 29
- Data sheets: [TCDS H13EU](https://openairdocs.org/tcds/H13EU)
- Certificate PDF: https://openairdocs.org/files/sha256/1d/92/1d92c663593b5103f22122b2e29ca0cca379563436db1b767783a16db5bf1a43
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID133775013420260918150449.0001
- DRS record last changed: September 18, 2026
- Page: https://openairdocs.org/stc/SR11409DS

## ADs that name it (0)

None.

## Approved models (1)

- Airbus Helicopters Deutschland GmbH (AHD) MBB-BK 117 B-2 ([TCDS H13EU](https://openairdocs.org/tcds/H13EU))

## 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.

SR11409DS Airbus Helicopters, Inc.

2701 N. Forum Drive Grand Prairie, TX 75052 29 Code of Federal Regulations H13EU Airbus Helicopters Deutschland GmbH MBB-BK 117 C-2

1. This STC is applicable to all serial numbers for this Make/Model.

2. Additional limitations may be detailed in the Rotorcraft Flight Manual Supplement.

---See continuation sheet 3 2/23/26 9/17/26 Michael R. Giambrocco, ODA-700097-SW ODA Lead administrator 3 Installation of a TDFM Communication System in accordance with Airbus Helicopters, Inc.

Master Drawing List B430U0386500 Rev. C dated 9/10/2026 or later ODA approved revision.

SR11409DS 09/17/26 3

SR11409DS 09/17/26 Description of Type Design Change (continued from sheet 1):

Rotorcraft Flight Manual Supplement B150U0386670 Rev. A dated 9/17/2026 or later ODA approved revision and Instructions for Continued Airworthiness B150U0386680 Rev. A dated 9/17/2026 or later ODA or AED accepted revision are required.

Certification Basis Based on 14 CFR §§ 21.115 and 21.101 and the FAA policy for significant changes in FAA Order 8110.48A, the certification basis is the same as TCDS H13EU, Rev 25 dated 6/6/2025, with the following exception: 29.773 at Amdt 57.

Limitations and Conditions (continued from sheet 1):

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

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

---END--- 3 3 Add Page

## Every issue (1)

- September 17, 2026: Issued, Current. [certificate](https://openairdocs.org/files/sha256/1d/92/1d92c663593b5103f22122b2e29ca0cca379563436db1b767783a16db5bf1a43)

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