# STC SR12474NY

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Tech-Tool Plastics, Inc., United States
- Description: Installation of replacement windows
- Applied: May 13, 2024
- Status date: September 8, 2026
- Product: Aircraft, Rotorcraft
- Certification basis: Part 27
- Data sheets: [TCDS H88EU](https://openairdocs.org/tcds/H88EU)
- Certificate PDF: https://openairdocs.org/files/sha256/f2/2c/f22c56935ce5aec61c916fce8ab600be2f289b912c9267f7f11301b61044547a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID196019784220260917192743.0001
- DRS record last changed: September 17, 2026
- Page: https://openairdocs.org/stc/SR12474NY

## ADs that name it (0)

None.

## Approved models (8)

- Airbus Helicopters Deutschland GmbH (AHD) EC135P1 ([TCDS H88EU](https://openairdocs.org/tcds/H88EU))
- Airbus Helicopters Deutschland GmbH (AHD) EC135P2 ([TCDS H88EU](https://openairdocs.org/tcds/H88EU))
- Airbus Helicopters Deutschland GmbH (AHD) EC135P2+ ([TCDS H88EU](https://openairdocs.org/tcds/H88EU))
- Airbus Helicopters Deutschland GmbH (AHD) EC135P3 ([TCDS H88EU](https://openairdocs.org/tcds/H88EU))
- Airbus Helicopters Deutschland GmbH (AHD) EC135T1 ([TCDS H88EU](https://openairdocs.org/tcds/H88EU))
- Airbus Helicopters Deutschland GmbH (AHD) EC135T2 ([TCDS H88EU](https://openairdocs.org/tcds/H88EU))
- Airbus Helicopters Deutschland GmbH (AHD) EC135T2+ ([TCDS H88EU](https://openairdocs.org/tcds/H88EU))
- Airbus Helicopters Deutschland GmbH (AHD) EC135T3 ([TCDS H88EU](https://openairdocs.org/tcds/H88EU))

## 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.

SR12474NY Tech-Tool Plastics, Inc.

3315 Kensington Ave.

Richmond, VA 23221 27 Title 14, Code of Federal Regulations H88EU AIRBUS HELICOPTERS DEUTSCHLAND GmbH (AHD) EC135P1, EC135T1, EC135P2, EC135T2, EC135P2+, EC135T2+, EC135P3, EC135T3

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

2) 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.

3) This STC is applicable to all serial numbers for the make and models listed above.

05/13/2024 09/08/2026 For Michael Linegang Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service 2 Installation of replacement windows in accordance with Tech-Tool Plastics, Inc. Master Drawing list No. EC135-1000-100, Revision B, dated September 22, 2025, or later FAA-approved revision.

SR12474NY 2

## Every issue (1)

- September 8, 2026: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f2/2c/f22c56935ce5aec61c916fce8ab600be2f289b912c9267f7f11301b61044547a)

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