# STC SA1221SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Century Flight Systems Inc
- Description: Mitchell automatic flight system AK312 consisting of Century I with optional omni tracker.
- Status date: July 9, 1984
- Data sheets: 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12, 3A12
- Certificate PDF: https://openairdocs.org/files/sha256/10/54/10541f3ea79162c641b9461ed411456e99b81db471b2768e7fcaa2620f2403b5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2380A75C37AB04DD85256CC10080E03D.0001
- Page: https://openairdocs.org/stc/SA1221SW

## ADs that name it

None.

## Approved models (12)

- The Cessna Aircraft Company 172 (TCDS 3A12)
- The Cessna Aircraft Company 172A (TCDS 3A12)
- The Cessna Aircraft Company 172B (TCDS 3A12)
- The Cessna Aircraft Company 172C (TCDS 3A12)
- The Cessna Aircraft Company 172D (TCDS 3A12)
- The Cessna Aircraft Company 172E (TCDS 3A12)
- The Cessna Aircraft Company 172F (USAF T-41A) (TCDS 3A12)
- The Cessna Aircraft Company 172G (TCDS 3A12)
- The Cessna Aircraft Company 172H (USAF T-41A) (TCDS 3A12)
- The Cessna Aircraft Company 172I (TCDS 3A12)
- The Cessna Aircraft Company 172K (TCDS 3A12)
- The Cessna Aircraft Company 172L (TCDS 3A12)

## 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.

• SltaiJ*ti/jf> ^Department of tensportation —federal aoiation administration oipplemental l^gpe Certificate SA1221SW Century Flight Systems, Inc.

P.M. 1195 P. 0. RO-K 610 Mineral Wells, TX 76067 aj4ffefn^n.£^ ^,^0^ 3 *^J&t< Civil Air 3A12 Cessna 172, 172A, 172B, 172C, 172D, 172E, 172F, 172G, 172H, 1721, 172K, 172L .ri,a&.

Installation of Mitchell Automatic Flight System Model AK312 consisting of Century I with optional Omni Tracker System according to Bulletin No. 420 Revision (7) dated June 11, 1973 and Master Drawing List 87A319 Revision D dated June 11, 1973.

FAA Approved Mitchell Industries, Inc. Placard 13A634-312 is required for Models 172D, E, F, G. H. I, K, and L; Placard 13A681-312-1 is required for Models 172, A, B, and C.

Eligible on landplane only.

October 20, 1970 November 18, 1970 ^°F%> °ther Piously approved modifications ^ *•**»««/- 4-9-73; 7-24-73; 7-9-84, Revision 3 ,/1u-4/irfr/('i-ri «V trie •^f Manager, Aircraft Certification Division Southwest Region

TAu ttrttficatr may be transferred in accordance with f-AR 21.47.

Cn IONS' '['he Iran sf IT en dorse in cm hclovv may he used (o nuliK tin- appropriate h'A A (-'eg urn a I OfMtr ill" the Iransfrr of ihis Supplemental Typ< Crrtidt an- I'lu- I-'AA " ill TLISMH- liii- i;enifi< ale in the name ot th<- Iransferee and forward it 10 him.

TRANSFER ENDORSEMENT Transfer the ownership ni'Supplemental Type Certificate Number __ to (Name o/ (rans/erte) (Address of transferee) (Nvmbir and strttt) fCi/f, SlaU, OTirl ZIP codi) from (Name of grantor) (Print or typt) (Address oj grantor) (pfvmbti arid sfrret) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink).

## Every issue (1)

- July 9, 1984: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/10/54/10541f3ea79162c641b9461ed411456e99b81db471b2768e7fcaa2620f2403b5)

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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.