# STC SR02129SE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Aerometals, United States
- Description: Either or both replacement Aerometals Tail Rotor Transmission Input and Output Gearshaft Assemblies
- Applied: December 22, 2009
- Status date: September 12, 2013
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/69/50/69500583c084baa71e4d7bf207a7ebd50005d910e749b2df3da6ccdaab314b3e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EC57356BDEE3C89A86257BE4006A0288.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR02129SE

## ADs that name it (0)

None.

## Approved models (3)

- MD Helicopter Inc. 369D ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369E ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369FF ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))

## 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 SR02129SE

This certificate, issued to Aerometals 3920 Sandstone Drive El Dorado Hills, CA 95762

Part 6 of the Civil Air Regulations.

Original ProductType Certificate Number: H3WE Make: MD Helicopter Inc.

Model: 369D/E/FF

Description of the Type Design Change: Either or both replacement Aerometals Tail Rotor Transmission Input and Output Gearshaft Assemblies in accordance with Aerometals Master Drawing List Aero-MDL-012, Revision A, dated April 6, 2011, or later FAA-approved revision. Installation and maintenance in accordance with MD Helicopter Inc. (MDHI) Maintenance Manual CSP-HMI-2, Revision 43, dated December 23, 2009, or later FAA- accepted revision, and Component Overhaul Manual CSP-COM-5, Revision 17, dated July 28, 2007, or later FAA-accepted revision, except as noted on the continuation sheet.

Limitations and Conditions: Approval of this change in type design applies to the rotorcraft listed above only.

This approval should not be extended to other rotorcraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the relationship between this change and any of the other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that rotorcraft.

A copy of this certificate must be maintained as part of the permanent record of the modified rotorcraft.

Date of application: December 22, 2009 Date reissued: September 12, 2013 Date of issuance: April 18, 2011 Date amended: May 11, 2011

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

Number SR02129SE

Aerometals Issued: April 18, 2011 Reissued: September 12, 2013 Amended: May 11, 2011

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.

The life limits for Aerometals replacement Tail Rotor Transmission Input and Output Gearshaft Assemblies are noted in the table below.

Any decrease in the mandatory replacement time specified in the MDHI Airworthiness Limitations Replacement Schedule for the MDHI parts must be adhered to by the operator of the Aerometals replacement parts.

Any increase in the mandatory replacement time specified in the MDHI Airworthiness Limitations Replacement Schedule for the MDHI parts does not apply to the Aerometals replacements parts.

Component Model Part Number Finite Life Hours Tail Rotor Transmission Input Gearshaft Assembly 369D/E AM369D25434 12000 369FF 3365 Tail Rotor Transmission Output Gearshaft Assembly 369D/E/FF AM369D25430 7290

- END -

## Every issue (3)

- September 12, 2013: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/69/50/69500583c084baa71e4d7bf207a7ebd50005d910e749b2df3da6ccdaab314b3e)
- May 11, 2011: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/3f/46/3f461dbd591a74785bf14c98f2aa9b26a4a46aac0acf842c9887f2d3dda3c4f8)
- April 18, 2011: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/8c/b5/8cb59b7969dc351eb6c52b9484f6616817eb0dc07a0b705646b265d47554df1e)

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