# STC SA509SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: Installation of execulette side mounted lavatory.
- Applied: April 20, 1965
- Status date: August 31, 2000
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-723](https://openairdocs.org/tcds/A-723)
- Certificate PDF: https://openairdocs.org/files/sha256/bf/7c/bf7cebd869224eda05ef9ef43c57b7f5e7e23718b06b4c1bbe8bb30adfd14d00
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/06A96F3CDC5BAF8D86257E6C007A8226.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA509SW

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Martin Aeronautics Company 18 ([TCDS A-723](https://openairdocs.org/tcds/A-723))

## 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.

•Hmteb ^tates Of .America oi - (Sfeoeral (Antatt0n <A0mtniBtratt0n derttftcate SA509SW Signature Flight Support Corporation, a Delaware Corporation 7511 Leinmon Avenue, Hangar C Dallas, TX 75209 £&~%^ ^.yi^ijS^dem^/rH^ ^ Civil Air 723 Lockheed 18 Installation of Execulette side mounted lavatory in accordance with Drawing List SD506000-5 dated 4/15/65, or later FAA approved revision.

This STC is part of the basic Howard 250 and H250 Tri-Gear configuration and is covered by the flight manuals.

Compatibility of this modification with other previously approved modifications must be determined by the installer.

.-April 20, 1965 -April 23, 1965 -9/4/92; 12/21/98; 8/31/00 01, 1982 Rev. 7 ices Manage'r, S Southwest Region cation Office, (Title)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ^IP code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and ^1P code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- August 31, 2000: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/bf/7c/bf7cebd869224eda05ef9ef43c57b7f5e7e23718b06b4c1bbe8bb30adfd14d00)

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