# STC SA2993SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Purolator Facet, Inc, United States
- Description: Installation of a replacement coalescer filter P/N 23TD11.
- Applied: May 3, 1991
- Status date: November 20, 2017
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A23WE](https://openairdocs.org/tcds/A23WE)
- Certificate PDF: https://openairdocs.org/files/sha256/71/4f/714ff1d547a92806e55253e853494dc93b836b87628f5217aff7f75f30b32910
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/664D559745C23FBF86258211005F7A1A.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2993SO

## ADs that name it (0)

None.

## Approved models (4)

- Lockheed Martin Corporation L-1011-385-1 ([TCDS A23WE](https://openairdocs.org/tcds/A23WE))
- Lockheed Martin Corporation L-1011-385-1-14 ([TCDS A23WE](https://openairdocs.org/tcds/A23WE))
- Lockheed Martin Corporation L-1011-385-1-15 ([TCDS A23WE](https://openairdocs.org/tcds/A23WE))
- Lockheed Martin Corporation L-1011-385-3 ([TCDS A23WE](https://openairdocs.org/tcds/A23WE))

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

Part of the

Signature

Title SA2993SO Purolator Facet, Inc.

8439 Triad Drive Greensboro, NC 27409 25 Federal Aviation Regulations.

Lockheed L-1011 2 A23WE Installation of a replacement coalescer filter, Greentree Aerotech, Inc., (GAI) P/N 23TD11 as shown on GAI Drawing No.

23TD11, Original Issue, dated 5/16/91, or later FAA Approved revision, in Hamilton Standard Water Separator Assembly Numbers 733930-6 and 733930-8 of the air conditioning system in accordance with GAI Installation Drawing No.

CD-23TD11, Original Issue, dated 4/15/91, or later FAA Approved revision.

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 of those other previously approved modifications will produce no adverse effect upon the airworthiness of that airplane.

October 10, 1996, November 20, 2017 July 9, 1992 May 3, 1991 July 31, 1991 Tina Miller Manager, Program Management Section Wichita ACO Branch

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

To (Name and address of transferee)

From (Name and address of grantor)

2 SA2993SO

## Every issue (1)

- November 20, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/71/4f/714ff1d547a92806e55253e853494dc93b836b87628f5217aff7f75f30b32910)

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