# STC SR04501CH

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: CHI Aviation, United States
- Description: The certification of various configurations of cockpit side windows
- Applied: September 13, 2021
- Status date: February 27, 2023
- Product: Aircraft
- Data sheets: [TCDS 1H15](https://openairdocs.org/tcds/1H15)
- Certificate PDF: https://openairdocs.org/files/sha256/9a/0a/9a0a3620d35466e7edabbe21842c7ced70d097be0cda92df4fcc299f858663cf
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID158951584020230228202738.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SR04501CH

## ADs that name it (0)

None.

## Approved models (3)

- Sikorsky Aircraft Corporation S-61L ([TCDS 1H15](https://openairdocs.org/tcds/1H15))
- Sikorsky Aircraft Corporation S-61N ([TCDS 1H15](https://openairdocs.org/tcds/1H15))
- Sikorsky Aircraft Corporation S-61NM ([TCDS 1H15](https://openairdocs.org/tcds/1H15))

## 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.

SR04501CH CHI Aviation 3679 Bowen Road Howell, MI 48855 7 Civil Aviation Regulations 1H15 Sikorsky Aircraft S61N, S61NM, S-61L The certification of various configurations of cockpit side windows, in accordance with CHI Aviation drawing list CHI-201901-110, Revision C, or later FAA approved revisions.

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

(see page 3 for additional limitations and conditions) September 13, 2021 February 5, 2021 January 26, 2021 February 27, 2023 Monica L. Nemecek Manager, Airframe & Administrative Section Chicago ACO Branch 3

SR04501CH 3

SR04501CH Date Amended: February 27, 2023

Certification Basis (continued):

See Type Certificate Data Sheet No. 1H15 for complete certification basis.

2) 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.

3) FAA approved Rotorcraft Flight Manual Supplement, CHI-201901-400, Revision A, FAA approved December 9, 2022, or later FAA approved revision, is required for this modification.

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## Every issue (2)

- February 27, 2023: Amended, Current. [certificate](https://openairdocs.org/files/sha256/9a/0a/9a0a3620d35466e7edabbe21842c7ced70d097be0cda92df4fcc299f858663cf)
- February 5, 2021: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/30/3a/303afb290bf2d645d57c4bd73ffd879e9de55d08cc198506fa6ee6943d02df34)

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