# STC SH5729NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Grogan Don, United States
- Description: Full flow oil filter system
- Applied: January 17, 1991
- Status date: July 15, 1992
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 4H11](https://openairdocs.org/tcds/4H11)
- Certificate PDF: https://openairdocs.org/files/sha256/97/33/97331510a77ad8fad8ff7c3a49b918f372e3d08d13f61c2afb06b8a41f3afab1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B302B898491EB7C885256CC2005C3342.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH5729NM

## ADs that name it (0)

None.

## Approved models (2)

- Siam Hiller Holdings Inc. UH-12E ([TCDS 4H11](https://openairdocs.org/tcds/4H11))
- Siam Hiller Holdings Inc. UH-12E-L ([TCDS 4H11](https://openairdocs.org/tcds/4H11))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SH5729NM This certificate issued to: Don Grogan Certifies that the change in the type design for the following product with the limitations and conditions therefor as specified hereon meets the airworthiness reguirements of Pust 6 of the CiVil Air Regulations Original Product -Typebertificate Numben: 4H11 Make: Hiller Model:

UH-12E and UH-12E-L(Army OH-23G, H-23F) Marion an an at DE 100, revision, date mary 18,182 and Kit Parts List DG 102, revision A, dated June 16, 1992, and installed in accordance with Don Grogan Installation Instructions DG 101, dated June 16, 1992, or later FAA approved revisions.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate must be maintained as part of the permanent records for the modified aircraft.

Date of Application: January 17, 1991 Sale weissued:

Date of Issuance: July 15, 1992 Sale umended:

FEDERAL MIATION · the Jidministrater (Signature) TAHINIST RAND Manager, Special Certification Branch Seattle Aircraft Certification Office (Title)

47.

## Every issue (1)

- July 15, 1992: Issued, Current. [certificate](https://openairdocs.org/files/sha256/97/33/97331510a77ad8fad8ff7c3a49b918f372e3d08d13f61c2afb06b8a41f3afab1)

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