# STC SR04644CH

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Airwolf Aerospace LLC, United States
- Description: Replacement of existing main ship battery with Lithium Ion Battery and installation of Battery System Annunciator
- Applied: February 25, 2022
- Status date: July 29, 2025
- Product: Aircraft, Rotorcraft
- Certification basis: Part 27
- Data sheets: [TCDS H9EU](https://openairdocs.org/tcds/H9EU), [TCDS H11EU](https://openairdocs.org/tcds/H11EU)
- Certificate PDF: https://openairdocs.org/files/sha256/9f/24/9f24e815f97bb2d70d5b7d1f59b305f994560146bfeafe3d91609d26bd8c39bd
- Approved model list and other attachments: [SR04644CH_AML.pdf](https://openairdocs.org/files/sha256/f2/fc/f2fc44496d4f7622f95991183608e591354961bc432c0ad8357839d55f5f2f1c)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID134770946020250729181337.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR04644CH

## ADs that name it (0)

None.

## Approved models (13)

- Airbus Helicopters AS350B ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS350B1 ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS350B2 ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS350B3 ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS350BA ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS350C ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS350D ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS350D1 ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))
- Airbus Helicopters AS355E ([TCDS H11EU](https://openairdocs.org/tcds/H11EU))
- Airbus Helicopters AS355F ([TCDS H11EU](https://openairdocs.org/tcds/H11EU))
- Airbus Helicopters AS355F1 ([TCDS H11EU](https://openairdocs.org/tcds/H11EU))
- Airbus Helicopters AS355F2 ([TCDS H11EU](https://openairdocs.org/tcds/H11EU))
- Airbus Helicopters AS355N ([TCDS H11EU](https://openairdocs.org/tcds/H11EU))

## 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 (03/21) Page 1 of ___ SR04644CH Airwolf Aerospace LLC 15369 Madison Rd Middlefield, OH 44062 Title14 Code of Federal Regulations Part 27 See AML See AML See AML Replacement of existing main ship battery with Lithium Ion Battery and installation of Battery System Annunciator in accordance with Master Drawing List listed on AML SR04644CH; Instructions for Continued Airworthiness, Document No. ICA-STC-AA20-100 Rev IR, dated January 30, 2023 or later FAA accepted revision; Rotorcraft Flight Manual Supplement as listed on AML No. SR04644CH is required with this installation.

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

2. A copy of this Certificate and FAA Approved Model List (AML) No. SR04644CH must be maintained as part of the permanent records for the modified aircraft.

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.

May 25, 2022 February 14, 2024 Paul (Vu) Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 2 FOR

### SR04644CH_AML.pdf

**FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) STC SR04644CH FOR**

REPLACEMENT OF EXISTING SHIP BATTERY WITH LITHIUM ION BATTERY AND BATTERY SYSTEM ANNUNCIATOR ISSUE DATE: February 14, 2024

**ITEM AIRCRAFT MAKE**

**AIRCRAFT MODEL**

**ORIGINAL TC NUMBER**

**CERTIFICATION BASIS FOR**

**ALTERATION**

**FAA APPROVED**

**FLIGHT MANUAL**

**SUPPLEMENT**

**FAA APPROVED**

MASTER DATA LIST AML REV DATE Number Revision* Number Revision*

5. Airbus Helicopters AS350C, AS350D, H9EU See Note 1 FMS AS350.20 IR, dated 1/22/2024

MDL-STC- AA20-100 IR, dated 11/28/2023 7/29/2025 AS350D1, AS350B, AS350B1, AS350B2, AS350BA, AS350B3

7. Airbus AS355E, H11EU See Note 1 FMS IR, dated MDL-STC- IR, dated Helicopters AS355F, AS355.20 1/22/2024 AA20-100 11/28/2023 AS355F1, AS355F2, AS355N

*Or later FAA Approved Revision

Note 1: Certification Basis for Alteration is Part 27, Amendment 27‐1 thru 27‐20, Amendment thru 27‐40 for the following regulations: 27.301, 27.303, 27.305, 27.307,

27.337, 27.1301, 27.1501, 27.1529, 27.1581; 27.1583, 27.1585

FAA Approved:

For Paul Nguyen

Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service AMENDED:

REISSUE: 7/29/2025

Page 1 of 1

## Every issue (1)

- July 29, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/9f/24/9f24e815f97bb2d70d5b7d1f59b305f994560146bfeafe3d91609d26bd8c39bd), [SR04644CH_AML.pdf](https://openairdocs.org/files/sha256/f2/fc/f2fc44496d4f7622f95991183608e591354961bc432c0ad8357839d55f5f2f1c)

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