# STC SA621SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc
- Description: Installation of Mitchell automatic flight system Model AK198, consisting of Century III autopilot with optional automatic pitch trim, automatic aileron stabilizer and radio coupler.
- Status date: June 25, 1984
- Data sheets: 3A10, 3A10, 3A10, 3A10, 3A25, 3A25
- Certificate PDF: https://openairdocs.org/files/sha256/2d/20/2d201c69e8f42118b329bc8561baa86f79b2e38f4aa75db2b07e66a4d3cb7c76
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/24B6B152AD63196385256CC200569EE4.0001
- Page: https://openairdocs.org/stc/SA621SW

## ADs that name it

- [AD 70-15-18](https://openairdocs.org/ad/70-15-18): Automatic Pilot and Automatic Aileron Stabilizer Instruments · Mitchell Industries Auto Pilot Systems Instruments. Effective Aug 31, 1970

## Approved models (6)

- Textron Aviation Inc. 310K (TCDS 3A10)
- Textron Aviation Inc. 310L (TCDS 3A10)
- Textron Aviation Inc. 310N (TCDS 3A10)
- Textron Aviation Inc. 310P (TCDS 3A10)
- Textron Aviation Inc. 320E (TCDS 3A25)
- Textron Aviation Inc. 320F (TCDS 3A25)

## 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.

Bepartment of ^transportation -federal atnation administration Supplemental 'Cgpe Certificate SA621SW Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 ^wjA&^<>&c>tvw Civil Air 3A10, 3A25 Cessna 310K, 310L, 310N, 310P, 320E, 320F ^e^n^i&^^^C/^t^-l'^k^n^tAa^nM: Installation of Mitchell Automatic Flight System Model AK198, consisting of Century III Autopilot with Optional Automatic Pitch Trim, Automatic Aileron Stabilizer and Radio Coupler according to Bulletin No. 314, Revision 4 dated 6-16-69. Installation of Glide Slope Coupler according to Bulletin No. 366, dated 7-16-68, installation of Mitchell Radio Coupler 1C388-3 per Bulletin No. 611, Revision 1, dated 4-16-74 and Master Drawing List No. 87A708, Revision A, dated 4-16-74.

1. Mitchell Industries, Inc. FAA Approved Placard 13A329-198 required with Century III installation

2. Mitchell Industries, Inc. FAA Approved Placard 13A343-198 required with Stabilizer installation.

3. FAA Approved Autopilot Flight Manual Supplement, *P/N 68S168, dated 4-16-74 is Mitchell Radio Coupler Model 1C388-3.

<>revl0usly aPP-ved modifications < March 14, 1966 March 23, 1966 10-12-66; 1-9-67; 12-27-67;

7-14-69; 4-16-74; 6-25-84, Revision 6 Don P. Watson Manager, Aircraft Certification Division Southwest Region (Title)

This certificate may bt transferred in accordance with t-AR 21.17.

FAA FO«M SUO-2 (10-61)

1 0 notify the appropriate FAA Regional Office of the transfer of thu Supplemental Type Certificate.

The FAA will reissue the certificate in the name of the transferee and forward it 10 him.

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

(Address of transferee). ( ..Vumfcrr from (Name of grantor) (Print or type).

(Address of grantor) Extent of Authority (if licensing agreement):

(Citr. Sun.

Signature of grantor (In ink):

## Every issue (1)

- June 25, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2d/20/2d201c69e8f42118b329bc8561baa86f79b2e38f4aa75db2b07e66a4d3cb7c76)

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From OpenAirDocs.org, an independent open copy of FAA data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.