# STC SA3213SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc, United States
- Description: Installation of Mitchell automatic flight system model AK688 consisting of a Piper altimatic X autopilot or model AK688FD consisting of a Piper altimatic X flight director autopilot with optional remote annunciator.
- Applied: April 27, 1977
- Status date: December 7, 1983
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A8EA](https://openairdocs.org/tcds/A8EA)
- Certificate PDF: https://openairdocs.org/files/sha256/ab/f0/abf0f2ffb5b819dc934a29b5e3295cb9197a0e7d364583189b43ba60cbeba797
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6C8ABF4DDF198E7985256CC2000A9557.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3213SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-31P ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))

## 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.

United grata of anrrica Bepartment of transportation-federal atriation administration Supplemental 'Cpe Certificate 8A3213SW-D \ Century Flight Systems, Inc.

P.M. 1195 P. 0. Box 610 Mineral Wells, TX 76067 !\ v*lin&>f!^i&*cleA&gbWfi>r->4?i&f(>ttc>t4>4n&Jw*0(iu^M>tJ& \ 3 ^J&v Civil AlT isf&ati&a&O'nA'.

A8EA / •> y- fl/ A. • - /-/s^Awi/i/<u>n/ty^/M/ie'-^s€AA42#i' wt/ux/ruie' :

Installation of Mitthll Auttmmtlc Flight Sy»t«a Model AK688 consisting of * Pip«r Altimatic X Autopilot or Modal AK6887D contSMting of a Pipar Altimtie X Flight Diractor Autopilot with Optional Raaota Annunciator according to Bulletin Mo. 817. Revision 1, datad 10-25-77 and Mastar Drawing List No. 87A927, Ravi.ion A, datad 10-25-77 (28 Volt Syatam) and/or later FAA approved revision.

Eligible on Fiper Model PA-31P, 8/N 31P-7730001 and Up.

FAA/DAS Approved Pilot's Operating Handbook Supplement , P/N 688548, datad 5-26-77, revised 11-9-77, is required for Piper Model PA-31P, 8/N SIP-7730001 and Op and/ or later FAA approved revisions.

A Placard stating, "Conduct trim cheek prior to flight (See POH)" is required.

Compatibility of thia modification with other previously approved modifications must be determined by the installer.^A^JM^i/tC '^ 4-27-77 IX^^W, 11-9-77; 4-B6-78j 12-7-83 Revision 3 ' v&4 Don P. WatSOn Manager, Aircraft Certification Division Southwest Region (Title)

FAA Fout 81 10-2(10-68)

INSTRUCTIONS: The tranrfcr endowment below m.y be used 10 n<xify .he approve FAA Kegion.1 Office of the transfer of thii Supplemental Type Certificate.

The FAA will reiisue the certificate in the name of the traniferee and forward it to him.

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

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

(Address of grantor) , tmt ^IP f^'umter tnt artel) (Cit?, St*U.

Signature of grantor (In ink):

4i « <-. o n

## Every issue (1)

- December 7, 1983: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ab/f0/abf0f2ffb5b819dc934a29b5e3295cb9197a0e7d364583189b43ba60cbeba797)

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