# STC SA623SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: Installation of low oil pressure warning switch.
- Applied: January 25, 1966
- Status date: August 31, 2000
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A15](https://openairdocs.org/tcds/2A15)
- Certificate PDF: https://openairdocs.org/files/sha256/e6/69/e669e5165de2e537a67026dc6cd5ffb2bf9a8c1b714c2369f5084abbf5c4de68
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AE8E46BF3EAE931686257F540064CA0E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA623SW

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Aircraft Corporation 1329 Series ([TCDS 2A15](https://openairdocs.org/tcds/2A15))

## 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.

JBmteh gtatet ©f .America oi tEranspmrlatum - Jijcoeral (A6tatt0n ^Airmtnfslraium (Certificate SA623SW Signature Flight Support Corporation, a Delaware Corporation 7511 Lemmon Avenue, Hangar C Dallas, TX 75209 Civil Air 2A15 Lockheed 1329 Installation of low oil pressure warning switch as shown on EAS Drawing 344258 dated 1/22/66, or later FAA approved revision.

Note: Restrictor must always be installed before switch is installed on engine.

To be used on Lockheed 1329 aircraft with Pratt & Whitney JT12A-6 and JT12A-6A engines only per EAS Drawing 344258. Minimum operative oil pressure per Engine Specification 35 PSI.

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

25, 1966 January 31, 1966 . 9/4/92; 12/21/98; 8/31/00 01, 1982 Rev. 1 (Signature) S. Frances Cox Manager, Special Certification Office, Southwest Region __

INSTRUCTIONS: The transfer endowment below m.y be used to notify the appropriate FAA Kepon.l Office of the transfer of thu Supplemental Type Certificate.

The FAA will reissue the certificate in the name of the transferee and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee).

(Address of transferee).

(Cit>, Stale.

from (Name of grantor) (Print or type).

(Address of grantor) Extent of Authority (if licensing agreement): — Date of Transfer:.

Signature of grantor (In ink):

## Every issue (1)

- August 31, 2000: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e6/69/e669e5165de2e537a67026dc6cd5ffb2bf9a8c1b714c2369f5084abbf5c4de68)

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