# STC SA3007SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK504 consisting of Piper altimatic IIIC autopilot with optional command/automatic electronic pitch trim, radio coupler and glide slope coupler.
- Applied: June 27, 1974
- Status date: June 20, 1984
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 1A10](https://openairdocs.org/tcds/1A10)
- Certificate PDF: https://openairdocs.org/files/sha256/e1/d1/e1d10e299acd0506f19870470f0eb17609062b6d68b3d97cab4b1ab8a52f499d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A0F581AAEDE4522186257D810060A899.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3007SW-D

## ADs that name it (0)

None.

## Approved models (2)

- Piper Aircraft Inc. PA-23-160 ([TCDS 1A10](https://openairdocs.org/tcds/1A10))
- Piper Aircraft Inc. PA-E23-250 ([TCDS 1A10](https://openairdocs.org/tcds/1A10))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA30075W-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Part 3 of the CIVI1 Air Regulations Original Product - Type bertificate Numben: 1A10 Make: Piper Model: PA-23-150, PA-E23-250 Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK504 consisting of Piper Altimatic IIIC Autopilot with Optional Command/Automatic Electronic Pitch Trim, Radio Coupler and Glide Slope Coupler according to Bulletin No. 627, Revision 4, dated 4-4-79 and Master Drawing List No. 87A723, Revision D, dated 4-4-79 (28 Volt System) and/or later FAA Approved revisions of the above data.

Eligible on Piper Models PA-23-250, S/N 27-3944 and Up and PA-E23-250, S/N 27-3944 thru 27-7554181 and PA-23-250, S/N 27-3944 and Up and PA-E23-250, S/N 27-3944 through 27-7554181 when modified in accordance with STC SA909WE (Turbo Charged Engine).

See Continuation Sheet, Page 2, a part of this STC This se bleedetermined porting Last alich is the basis for appre val shall remain in effel until sur- Compatibility of this moditication with other previously approved modifications vendered, suspended, vevoked, or a termination date is sherwise established by the Advinis brater of the Federal Aviation Administration .

Date of Application: 6-27-74 Jule wisdered: 4-22-75; 8-8-75; 8-31-77, 4-5-79; 6-20-84, Revision 5 Date of Issuance: 7-22-74 I ale unended:

FEDERAL AVIATION By distin of the Advinistrates Garin Don P. Watson (Signature ) TO MINISTRATIO Manager, Aircraft Certification Division Southwest Region (Title)

47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA3007SW-D, Revision 5, dated 6-20-84 Limitations and Conditions: continued:

FAA/DAS Approved Airplane Flight Manual Supplement, P/N 68S180-2, dated 7-30-75 for Piper PA-23-250 and PA-E23-250, S/N 27-3944 through 27-7554181 and the above models modified in accordance with STC SA909WE (Turbo Charged Engines). FAA/DAS Approved Pilot's Operating Handbook Supplement, P/N 68S232-2, dated 4-5-79, for PA-23-250, S/N 27-7654001 and Up and when modified in accordance with STC SA909WE (Turbo Charged Engines). A Placard statingConduct trim check prior to flight (See POH)" is required for owners with a Pilot's Operating Handbook. A Placard stating "Conduct trim check prior to flight (See AFM)" is required for owners with an Airplane Flight Manual.

47.

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

Signature of grantor (In ink):

## Every issue (1)

- June 20, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e1/d1/e1d10e299acd0506f19870470f0eb17609062b6d68b3d97cab4b1ab8a52f499d)

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