# STC SA00481DE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Quiet Flight LLC, United States
- Description: Installation of an Aircraft Noise Control (ANC) System.
- Applied: March 5, 2002
- Status date: September 25, 2002
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- Certificate PDF: https://openairdocs.org/files/sha256/6b/f0/6bf05895345cbc0d38305a84fc5b25d96029b9c0fe06aac3a9beb7121fc28db1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/349C8D416B99310F86256E55006035AF.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA00481DE

## ADs that name it (0)

None.

## Approved models (20)

- Twin Commander Aircraft LLC 560-F ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 680 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 680-E ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 680-F ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 680-FL ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 680-FL(P) ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 680-T ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 680-V ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 680-W ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 681 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 685 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 690 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 690A ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 690B ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 690C ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 690D ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 695 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 695A ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 695B ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft LLC 720 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

## 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: SA00481DE This certificate issued to: Quiet Flight LLC 11740 Airport Way, Hanger 36E Broomfield, CO 80021 Part 23 of the Federal Aviation Regulations.

Original Product - Type Certificate Number: 2A4 Make: Twin Commander Model: Model: 560-F, 680, 680-E, 680-F, 720, 680FL, 680FL(P), 680T, 680V, 680W, 681, 685, 690, 690A, 690B, 690C, 690D, 695, 695A, 695B Description of Type Design Change:

Installation of an Aircraft Noise Control (ANC) System in accordance with Master Data List for Twin 2002, or later FAA approved revision. Commander 690, Document No. 142401257, revision C, dated July 01, 2002, FAA approved September 24, Limitations and Conditions:

1. Compatibility of this design change with previously approved modifications must be determined by installer.

2. A copy of this certificate and FAA approved Airplane Flight Manual Supplement, Document No. 142401269, Revision A, dated September 24, 2002, or later FAA approved revision must be maintained as part of the permanent records of the modified aircraft.

3. Instructions for Continued Airworthiness, Document No. 900000003, entitled, SRC360 Active Noise Cancellation System", Revision E, dated May 29, 2002, or later FAA accepted revision is required for this installation.

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.

Date of Application: March 5, 2002 Date Reissued:

Date of Issuance: September 25, 2002 Date Amended:

FEDER By Direction of the Administrator Melissa Sandow (Signature) Small Airplane Program Manager Melissa findow OMINIST RATION Northwest Mountain Region Denver Aircraft Certification Office (Title)

## Every issue (1)

- September 25, 2002: Issued, Current. [certificate](https://openairdocs.org/files/sha256/6b/f0/6bf05895345cbc0d38305a84fc5b25d96029b9c0fe06aac3a9beb7121fc28db1)

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