# STC SA636SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Apache Modification Aircraft Corporation, United States
- Description: Modified nose, gear doors, nacelle fairings, and wing tips.
- Applied: April 11, 1966
- Status date: October 10, 1997
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A10](https://openairdocs.org/tcds/1A10)
- Certificate PDF: https://openairdocs.org/files/sha256/bf/cf/bfcf23d37221bb66096ad17effac66b3dee623b89593839f4096b2abda8f5580
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/576A72B1D747165285256CC200569F33.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA636SW

## ADs that name it (0)

None.

## Approved models (4)

- Piper Aircraft Inc. PA-23 ([TCDS 1A10](https://openairdocs.org/tcds/1A10))
- Piper Aircraft Inc. PA-23-160 ([TCDS 1A10](https://openairdocs.org/tcds/1A10))
- Piper Aircraft Inc. PA-23-235 ([TCDS 1A10](https://openairdocs.org/tcds/1A10))
- Piper Aircraft Inc. PA-23-250 (Navy UO-1) ([TCDS 1A10](https://openairdocs.org/tcds/1A10))

## 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.

~tltittb ~tatu <l)f!,mrrica Jgepnrt1tt£n! of 'CIrrnnspor!ntion - Jlfehernl J\&intion J\:llminis!rn!ion ~uppl.emental W~pcQIcrtifil.:atc .A/~ SA636SW ,9;f~ ~~-t'«<A AJ.H,-/h Apache Modification Aircraft Corporation 1893 Airport Road Kalispell, MT 59901 """-?4•••dr./ a;, d,.o/~ u. a;,{y/'" ..w;-;4- a;,/~~.ud uW.,{' a;, k.«'<r./~ «Ad ~'/d~ ~ ,,0>~....,(A"~.........:.a;, .dN""'"".,{'u......~«~o> 0/"g'bA' 3o/"a;, Civil Air ~u&./,,,,,,,, &~/g>~ ~/'" ~&o,/l/...".4.' ...,Ita..&..' lAlO Piper PA-23, PA-23-lGO, PA-23-235, PA-23-250 ~,;". o/"~/'~ ~~.

Modified nose, gear doors, nacelle fairings, and wing tips according to Drawing List 700 dated 2/27/71, or later FAA approved revision .

..Z'U7w~n.l'~ «""a' ~d'Hw.J..' Compatibility of this design change with previously approved modifications must be determined by the installer.

(See continuation sheet 300) g?,l;:>"""-~<Y¥&o «Ad a;,~ aW'a ,.."C,..,{'.., a;, tf:,.~;4- ,,~/.;k4' ,"""",Uo u. ~ ad,/, .••~ .J«.Y'~'/-r. ~"". a ho7,v,u./,.;". -k...:...,,,a;..,~ ~ ~ a;,~~/~ o/"/A"..

~~/ ~;,../,.;". A./"",:.u:s/,,",,~ !'2f;,./~~~ ..1l/24/92; 10/10/97 Office (Title) (Signature) A.J. Merrill, Manager Special Certification Southwest Region Any .It ••roltlon of thl.s c.rtlf1c.te 1" pun1.sholble by. f1ne of not ••1(~edlnq $1.000. or Il11prlsonment not f>l(c~lnq J ye"rs, or both.

FAA FocllI 8110-2110-681 Pa'Je 1 of )

~lltitrb 5'tatu OPfJ\.mrriur ~epnrhnenl of '1ITrnnsporhtlion - Jlfe~erltI J\&inlion J\~tninislrltlion ~upplcmcnhtl WtlPC(([crtificatc (QIoutiuuatiou ~qcet) Date of Issuance:

SA636SW July 13, 1966 Z,-n•.«u/Uvw u..nd'~...u.l"~ (Continued):

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Any <IIlt~r<lltJon of thJ.f ~rt1EJcdt •• 1-, punJ.fhdb1e by <II rJn •• oE not exceeding $J,OOO, or 1IrlprJ-'on_nt not ~xc~ll1(/ 3 Y""<IIr.f, or both.

FAA For •• 8110~2~1110-691 Paga 3 of 3 This CE'rtJEJc<IIte IlldY be trdn!fferrf'd in <IIccord.tnce ",lth FAA 11.41.

## Every issue (1)

- October 10, 1997: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/bf/cf/bfcf23d37221bb66096ad17effac66b3dee623b89593839f4096b2abda8f5580)

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