# STC ST04464AT - Type: Supplemental type certificate - Status: Current, Issued - Holder: Quiet Technology Aerospace, United States - Description: Replacement of the inner aluminum barrel of the engine inlet cowl - Applied: September 27, 2019 - Status date: October 9, 2019 - Product: Aircraft, Large Airplane - Certification basis: Part 21, Part 25 - Data sheets: [TCDS TC00062IB](https://openairdocs.org/tcds/TC00062IB) - Certificate PDF: https://openairdocs.org/files/sha256/85/7d/857d5401e23b166cd279e8ad16757f9c047c2d891ab829be1a894ffd45fa0b2b - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5D6BE3ACC92E66FF862585D2004C6740.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/ST04464AT ## ADs that name it (0) None. ## Approved models (2) - Embraer S.A. EMB-545 ([TCDS TC00062IB](https://openairdocs.org/tcds/TC00062IB)) - Embraer S.A. EMB-550 ([TCDS TC00062IB](https://openairdocs.org/tcds/TC00062IB)) ## 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. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Possession of this Su pplemental Type Certificate (STC) document by persons other than the STC holder does not constitute rights to the design data nor to alter an aircraft, aircraft engine, or propeller. The STC’s supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is th e property of the STC holder. FAA Form 8110-2 (5/14) Page 1 of 3 Number: ST04464AT This certificate issued to: Quiet Technology Aerospace 4100 N 29th Terrace Hollywood, FL 33020 Part 25 of the Federal Aviation Regulations. Original Product – Type Certificate Number: TC00062IB Make: Embraer S.A. Model: EMB-545 (Legacy 450, Praetor 500) EMB-550 (Legacy 500, Praetor 600) Description of Type Design Change: Replacement of the inner aluminum barrel of the engine inlet cowl with a Quiet Technology Aerospace inlet barrel of carbon graphite sandwich construction in accordance with Quiet Technology Aerospace document “Bombardier Challenger 300/350, Gulfstream G280 and Embraer Legacy 450-500 Inlet Cowl Inner Barrel Replacement Master Drawing List,” Report No. QTA 6301, Rev. B, dated September 18, 2019, and “Bombardier Challenger 300/350, Gulfstream G280 and Embraer Legacy 450/500 Inlet Cowl Inner Barrel Replacement Assemble Procedure,” Report No. QTA 6305, Rev. B, dated September 20, 2019, or later FAA approved revisions. The following Quiet Technology Aerospace documents are required with this installation: “Embraer EMB545 - Legacy 450/Praetor 500 EMB550 - Legacy 500/Praetor 600 Inlet Cowl Inner Barrel Replacement Instructions for Continued Airworthiness,” QTA Ref. No. QTA 6503, Rev. IR, dated October 4, 2019, and “Structural Repair Manual for the Embraer EMB 545 (Legacy 450 and Praetor 500) and EMB 500 (Legacy 500 and Praetor 600) Modified Nose Cowl Part Number CH3-NC- 6300,” Report No. QTA-6504, Rev. IR, dated August 16, 2019, or later FAA approved revisions. This modification has been determined by the FAA to be no acoustical change per 14 CFR §21.93(b). 1. The installer must determine whether this design change is compatible with previously approved modifications. (Limitations and Conditions continued on Page 3 of 3) Date of Application: September 27, 2019 Date Reissued: Date of Issuance: October 9, 2019 Date Amended: Signature Title Christina M. Underwood, Manager Atlanta Aircraft Certification Office Branch United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate The STC’s supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is th e property of the STC holder. FAA Form 8110-2 (5/14) Page 2 of 3 Transfer the ownership of Supplemental Type Certificate Number: ST04464AT To (Name and address of transferee) From (Name and address of grantor) United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: ST04464AT The STC’s supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is th e property of the STC holder. FAA Form 8110-2 (5/14) Page 3 of 3 Date of Issuance: October 9, 2019 Date Amended: 2. A copy of this certificate must be maintained as part of the permanent records for the modified aircraft. 3. 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. Certification Basis: Based on 14 CFR § 21.115 and § 21.101, and the FAA policy for changes that are not significant in FAA Order 8110.48, the certification basis for this modification are as follows: a. The type certification basis for the Embraer S.A. models EMB-545 and EMB-550 aircraft is shown on TCDS No. TC00062IB for parts not changed or not affected by the change. b. The type certification basis for the Embraer S.A. models EMB-545 and EMB-550 aircraft is shown on TCDS No. TC00062IB for parts changed or affected by the change. ---------END-------- ## Every issue (1) - October 9, 2019: Issued, Current. [certificate](https://openairdocs.org/files/sha256/85/7d/857d5401e23b166cd279e8ad16757f9c047c2d891ab829be1a894ffd45fa0b2b) --- 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.