# STC SA3180SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Purlator Facet, Inc, United States
- Description: Installation of a replacement coalescer filter, Greentree Aerotech Inc, (GAI) P/N 23TD47 or P/N 23TD47-1.
- Applied: May 1, 1991
- Status date: November 20, 2017
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/c6/40/c640c2287603f04b5f6c5e4d8a1c4cf0aae4c605947aeb5e0f70f037c95692d6
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4D856E2F1123B45A862581E70056EA84.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3180SO

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747 ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

## 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.

FAA Form 8110-2 (5/14) Page 1 of 2

Number: SA3180SO

This certificate issued to: Purolator Facet, Inc.

8439 Triad Drive Greensboro, NC 27409

Part 25 of the Federal Aviation Regulations.

Original Product – Type Certificate Number: A20WE Make: Boeing Model: 747

Description of Type Design Change: Installation of a replacement coalesce filter, Greentree Aerotech, Inc., (GAI) P/N 23TD47 or P/N 23TD47-1, as shown on GAI Drawing No. 23TD47, or 23TD47-1 respectively, Rev. “B”, dated 01/17-92, or later FAA Approved revision in a Hamilton Standard Separator Assembly (P/N 719226-3 only) of the air conditioning system in accordance with GAI Installation Drawing No. CD-23TD47 or CD-23TD47-1 respectively, Rev A. dated 01/10/92, or later FAA Approved Revision.

Limitations and Conditions: This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated, unless it is determined by the installer that the interrelationship between this change and any other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane.

Date of Application: May 03, 1991 Date Reissued: March 27, November 20, 2017 Date of Issuance: March 16, 1992 Date Amended:

Signature Title (for) Christina M. Underwood Manager, Atlanta ACO Branch

FAA Form 8110-2 (5/14) Page 2 of 2

Transfer the ownership of Supplemental Type Certificate Number: SA3180SO

To (Name and address of transferee)

From (Name and address of grantor)

## Every issue (2)

- November 20, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/c6/40/c640c2287603f04b5f6c5e4d8a1c4cf0aae4c605947aeb5e0f70f037c95692d6)
- March 27, 1996: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/f2/27/f22753d2f8ef162461f718b494777f39cf777386d539fef5acdd1a119476bca8)

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