# STC SR04527AT

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Ace Aeronautics, LLC, United States
- Description: Installation of Robertson Fuel System 200 Gallon Internal Auxilliary Fuel Tank System (IAFTS
- Applied: September 18, 2018
- Status date: April 13, 2026
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS R00005RC](https://openairdocs.org/tcds/R00005RC), [TCDS R0012DE](https://openairdocs.org/tcds/R0012DE), [TCDS R00021LA](https://openairdocs.org/tcds/R00021LA), [TCDS R00020AT](https://openairdocs.org/tcds/R00020AT), [TCDS R00026LA](https://openairdocs.org/tcds/R00026LA), [TCDS R00019AT](https://openairdocs.org/tcds/R00019AT), [TCDS R00054SE](https://openairdocs.org/tcds/R00054SE), [TCDS R00058SE](https://openairdocs.org/tcds/R00058SE), [TCDS R00003AC](https://openairdocs.org/tcds/R00003AC), [TCDS R00020LA](https://openairdocs.org/tcds/R00020LA), [TCDS R00025LA](https://openairdocs.org/tcds/R00025LA), [TCDS R00022LA](https://openairdocs.org/tcds/R00022LA), [TCDS R00052SE](https://openairdocs.org/tcds/R00052SE), [TCDS R00023LA](https://openairdocs.org/tcds/R00023LA)
- Certificate PDF: https://openairdocs.org/files/sha256/04/c0/04c0f489e1023bc6f769a5ea61767b8806d52ad32fc6a22c5bc704d3ba7560d9
- Approved model list and other attachments: [SR04527AT AML.pdf](https://openairdocs.org/files/sha256/31/35/3135c26a7f4b23ec84db61f421d78524c70e5601558188465aac9887e3a08ddb)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID118149204520261002191823.0001
- DRS record last changed: October 2, 2026
- Page: https://openairdocs.org/stc/SR04527AT

## ADs that name it (0)

None.

## Approved models (17)

- ACE Aeronautics LLC UH-60A ([TCDS R00005RC](https://openairdocs.org/tcds/R00005RC))
- BHI H60 Helicopters LLC BHI H60 (UH-60A) ([TCDS R0012DE](https://openairdocs.org/tcds/R0012DE))
- Billings Flying Service Inc UH-60A ([TCDS R00021LA](https://openairdocs.org/tcds/R00021LA))
- CAPITOL HELICOPTERS INC HH-60L ([TCDS R00026LA](https://openairdocs.org/tcds/R00026LA))
- CAPITOL HELICOPTERS INC UH-60A ([TCDS R00026LA](https://openairdocs.org/tcds/R00026LA))
- Carson Helicopters Inc. UH-60A ([TCDS R00020AT](https://openairdocs.org/tcds/R00020AT))
- Delta Enterprise EH-60A ([TCDS R00019AT](https://openairdocs.org/tcds/R00019AT))
- Delta Enterprise UH-60A ([TCDS R00019AT](https://openairdocs.org/tcds/R00019AT))
- High Performance Helicopters Corp. UH-60A ([TCDS R00054SE](https://openairdocs.org/tcds/R00054SE))
- Northwest Rotorcraft LLC UH-60A ([TCDS R00058SE](https://openairdocs.org/tcds/R00058SE))
- PJ Helicopters Inc UH-60A ([TCDS R00020LA](https://openairdocs.org/tcds/R00020LA))
- Pickering Aviation Inc. UH-60A; EH-60A ([TCDS R00003AC](https://openairdocs.org/tcds/R00003AC))
- SIXTYHAWK TC LLC HH-60L ([TCDS R00025LA](https://openairdocs.org/tcds/R00025LA))
- SIXTYHAWK TC LLC UH-60A ([TCDS R00025LA](https://openairdocs.org/tcds/R00025LA))
- SKYDANCE BLACKHAWK OPERATIONS LLC UH-60A ([TCDS R00022LA](https://openairdocs.org/tcds/R00022LA))
- Timberline Helicopters Inc. UH-60A ([TCDS R00052SE](https://openairdocs.org/tcds/R00052SE))
- Unical Aviation Inc. UH-60A ([TCDS R00023LA](https://openairdocs.org/tcds/R00023LA))

## 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 8110-2 (10/24) Page 1 of 4 United States of America Department of Transportation Federal AviationAdministration Supplemental Type Certificate

This certificate issued to: Ace Aeronautics, LLC.

105 Buck Island Road Guntersville, AL 35976 SR04527AT

Part 21 of Federal Aviation Regulations .

*See attached AML

*See attached FAA Approved Model List Description of Type Design Change: Model: No. SR04572AT for make/models approved Installation of Robertson Fuel System 200 Gallon Internal Auxilliary Fuel Tank System (IAFTS) in accordance with the configuration and installation details defined in US Armed Forces approved Airworthiness Release (AWR) 1532 Appendix B, 2 - 5, dated Sept 17, 2008. Flight Manual Supplement XPS-TM-HM-026-200G-10-B Rev IR, dated July 21, 2021, or later FAA-approved revision, is required. Instructions for Continued Airworthiness XPS-IAFTS-ICA Rev IR, dated August 28, 2021, or later FAA-approved revision, are applicable.

1. Approval of this change in type design applies to model aircraft on AML SR04527AT only. A copy of this Certificate must be maintained as part of the permanent records for the modified aircraft.

(See Continuation Sheet 3 of 4 pages)

Date of Application: 09/18/2018 Date Reissued: 02/28/2022 04/13/2026 Date of Issuance: 10/22/2021 Date Amended:

Michael Linegang Manager, East Certification Branch

Compliance & Airworthiness Division Aircraft Certification Service

FAA 8110-2 (10/24) Page 2 of 4 United States of America Department of Transportation Federal AviationAdministration Supplemental Type Certificate

Number: SR04527AT Effective Date: 04/13/2026

Page 3_ of 4_ FAA 8110-2 (10/24) Add Page

United States of America Department of Transportation Federal AviationAdministration Supplemental Type Certificate

(Continuation Sheet) Number: SR04527AT Effective Date:

Limitations and Conditions (continued) 04/13/2026

2. This STC is applicable only to the Models listed that were manufactured prior to April 5, 2020 due to the the 2018 Congressional Mandate for Crash Resistant Fuel Systems. Removal of this limitation may require compliance to 14 CFR §29.952, §29.963, and §29.975.

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

4. 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.

5. Only articles for the Accumulator Hand Pump and Handle relocation portion of the installation can be produced through a Part 145 Repair Facility in accordance with 14 CFR §21.9(a). All other articles can be acquired from the military; new-production articles from the OEM supplier to the military; or through sellers of articles for military surplus aircraft. The original OEM supplier to the military may produce articles for installation under their military production system with a §21.9(c) exemption. If a new PMA is sought for articles produced for this installation, additional design approvals will be required.

(See Continuation Sheet 4 of 4 pages)

Page 4_ of 4_ FAA 8110-2 (10/24) Add Page

United States of America Department of Transportation Federal AviationAdministration Supplemental Type Certificate

(Continuation Sheet) Number: SR04527AT Effective Date: 04/13/2026 Certification Basis

Title 14 CFR Part 21 § 21.25(a)(2) effective February 1, 1965, including Amendments 21-1 through 21-42

1. This STC is approved in accordance with Order 8110.56B, paragraph 4-15e, "Modifications Previously Qualified by the U.S. Armed Forces". The required military installation instructions are referenced in the Description of the Type Design Change.

2. Any subsequent modifications to the military approved installation instructions for this STC are to have the certification basis for that modification established under 14 CFR part 21 § 21.101 published June 7, 2000 which became effective June 10, 2003.

Otherwise non-significant modifications are to meet the requirements of 14 CFR 29 airworthiness standards, transport category, Amendment 1 through Amendment 17, effective December 1, 1978, and 14 CFR part 29 § 29.1529, Instructions for Continued Airworthiness, Amendment 20, effective September 11, 1980.

------------------------------------------------------END--------------------------------------------------------

### SR04527AT AML.pdf

APPROVED MODEL LIST NO. SR04527AT Revision IR 27 October 2021 Rotorcraft Make and Model Rotorcraft Type Certificate No. and Certification Basis Rotorcraft Specification No. and Revision Level Pickering Aviation, Inc.

EH-60A R00003AC 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00003AC Rev 1 ACE Aeronautics, LLC UH-60A R00005RC 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00005RC Rev 2 BHI H60 Helicopters, LLC UH-60A R0012DE 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R0012DE Rev 1 Delta Enterprise EH-60A, UH-60A R00019AT 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00019AT Rev 2 Carson Helicopters, Inc.

UH-60A R00020AT 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00020AT Rev 2 PJ Helicopters, Inc.

UH-60A R00020LA 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00020LA Rev 0 Billings Flying Service, Inc.

UH-60A R00021LA 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00021LA Rev 0 SkyDance Blackhawk Operations, LLC UH-60A R00022LA 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00022LA Rev 0 Unical Aviation, Inc.

UH-60A R00023LA 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00023LA Rev 0 SixtyHawk TC, LLC EH-60A, HH-60L R00025LA 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00025LA Rev 1 Capitol Helicopters, Inc.

UH-60A, HH-60L R00026LA 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00026LA Rev 0 Timberline Helicopters, Inc.

UH-60A R00052SE 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00052SE Rev 2 Page 1 of 2

High Performance Helicopters Corp.

UH-60A R00054SE 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00054SE Rev 0 Northwest Rotorcraft, LLC UH-60A R00058SE 14 CFR 21.25(a)(2), 1 Feb 65, Incl Amdt 21-1 thru 21-42 R00058SE Rev 0 This installation has been found to be compliant with 14 CFR 21.25(a)(2), October 24, 1964, as amended by Amdt. 21-42.

FAA Approved:

Manager, Aircraft Certification Office Federal Aviation Administration Atlanta, Georgia Page 2 of 2

## Every issue (3)

- April 13, 2026: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/04/c0/04c0f489e1023bc6f769a5ea61767b8806d52ad32fc6a22c5bc704d3ba7560d9), [SR04527AT AML.pdf](https://openairdocs.org/files/sha256/31/35/3135c26a7f4b23ec84db61f421d78524c70e5601558188465aac9887e3a08ddb)
- February 28, 2022: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/e2/d0/e2d04747427e70d17dff621390ca6d6340982b5a689220f074f03adbc92f81a1), [SR04527AT AML.pdf](https://openairdocs.org/files/sha256/31/35/3135c26a7f4b23ec84db61f421d78524c70e5601558188465aac9887e3a08ddb)
- October 22, 2021: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/a9/ff/a9ff1f8d5b9dbb482b515b7fe5937797aba5dbdf9aed3783e7c9dc50f7ad58d1), [SR04527AT AML.pdf](https://openairdocs.org/files/sha256/ae/08/ae085a76ec4329adebef79416033aa36107cab95917378436a4fc4b076a12a67)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.