# STC SA3989SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: American Airlines Inc, United States
- Description: Modify landing gear and wheels on the F28 Mark 0100 aircraft by removing the Nitrogen servicing placards
- Applied: March 27, 1997
- Status date: April 11, 1997
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A20EU](https://openairdocs.org/tcds/A20EU)
- Certificate PDF: https://openairdocs.org/files/sha256/fa/21/fa219357fefd80f56f31ee712a6c0418ec7192c44855725268da610d4d8ac011
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/586A386BB5AAF22F85256CC2000C5C4E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3989SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Fokker Services B.V. F.28 Mark 0100 ([TCDS A20EU](https://openairdocs.org/tcds/A20EU))

## 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.

tinted 3tatt» of amrrica Btpartment of ^transportation— federal 2toiation administration Supplemental t:gpe Certificate <sl<aMta/to SA 3989 SW-D American Airlines, Inc.

P. O. Box 582809 MD208 Tulsa, Oklahoma 74158-2809 ^ 25 Federal Aviation A20EU Fokker F28 Mark 0100 Modify the landing gear and wheels on the F28 Mark 0100 Aircraft by removing the Nitrogen servicing placards in accordance with ECO S0439XX dated 4/1/97.

This approval should not be incorporated in any aircraft of this specific model until compatibility of this modification with previously approved modifications has been determined by the installer.

Nitrogen servicing of the landing gear tires must be accomplished in accordance with an approved maintenance program procedure. (Ref. AD 87-08-09) 3/27/97 4/11/97 ^.

d-w ,jtu, E. J. Grewe (SignatutJ) DAS 1SW Coordinator (Title )_

FAA Fow 8II0-2 (10-6S)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) {Number and street) (City, Stale, and ^IP code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and <?/> code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- April 11, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/fa/21/fa219357fefd80f56f31ee712a6c0418ec7192c44855725268da610d4d8ac011)

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