# STC SA660WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Pacific Scientific, United States
- Description: Installation of HRD-type fire extinguishing system. (AND STC SA111WE)
- Status date: February 4, 1987
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A21EU](https://openairdocs.org/tcds/A21EU), [TCDS 3A10](https://openairdocs.org/tcds/3A10), [TCDS 3A17](https://openairdocs.org/tcds/3A17), [TCDS 3A21](https://openairdocs.org/tcds/3A21), [TCDS 3A25](https://openairdocs.org/tcds/3A25), [TCDS A6CE](https://openairdocs.org/tcds/A6CE), [TCDS A7CE](https://openairdocs.org/tcds/A7CE), [TCDS A-806](https://openairdocs.org/tcds/A-806), [TCDS Miscellaneous](https://openairdocs.org/tcds/Miscellaneous), [TCDS 1A10](https://openairdocs.org/tcds/1A10), [TCDS 1A15](https://openairdocs.org/tcds/1A15), [TCDS A8EA](https://openairdocs.org/tcds/A8EA), [TCDS 3A15](https://openairdocs.org/tcds/3A15), [TCDS 3A16](https://openairdocs.org/tcds/3A16), [TCDS 3A20](https://openairdocs.org/tcds/3A20), [TCDS 5A4](https://openairdocs.org/tcds/5A4), [TCDS A-765](https://openairdocs.org/tcds/A-765), [TCDS A-777](https://openairdocs.org/tcds/A-777), [TCDS A12CE](https://openairdocs.org/tcds/A12CE), [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- Certificate PDF: https://openairdocs.org/files/sha256/ec/63/ec6315abe6ade9a992f7d2267dd680d605fcead31e01a1f6f8674ceca0ff6758
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F4EDE86BA9E1DA3C85256CC200569FC0.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA660WE

## ADs that name it (0)

None.

## Approved models (137, first 50)

- British Aerospace (Scotland) HP 137 Jetstream Mk. 1 ([TCDS A21EU](https://openairdocs.org/tcds/A21EU))
- Miscellaneous Miscellaneous ([TCDS Miscellaneous](https://openairdocs.org/tcds/Miscellaneous))
- Raytheon Aircraft Company 35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company 35-33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Raytheon Aircraft Company 35-A33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Raytheon Aircraft Company 35-B33 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Raytheon Aircraft Company 35R ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company 50 (L-23A) ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company 56TC ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company 60 ([TCDS A12CE](https://openairdocs.org/tcds/A12CE))
- Raytheon Aircraft Company 65 (L-23F) ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Raytheon Aircraft Company 65-80 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Raytheon Aircraft Company 65-A80 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Raytheon Aircraft Company 65-B80 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Raytheon Aircraft Company 70 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Raytheon Aircraft Company 95 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company 95-A55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company A35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company A56TC ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company A65 ([TCDS 3A20](https://openairdocs.org/tcds/3A20))
- Raytheon Aircraft Company B35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company B50 (L-23B) ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company B50 (L-23D) ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company B50 (RL-23D) ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company B95 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company C-45G ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company C-45H ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company C35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company C50 ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company D18C ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company D18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company D35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company D50 (L-23E) ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company D50A ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company D50B ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company D50C ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company D50E ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company D55 ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company D95A ([TCDS 3A16](https://openairdocs.org/tcds/3A16))
- Raytheon Aircraft Company E18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company E18S-9700 ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company E35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company E50 ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company F35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company F50 ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company G18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company G35 ([TCDS A-777](https://openairdocs.org/tcds/A-777))
- Raytheon Aircraft Company G50 ([TCDS 5A4](https://openairdocs.org/tcds/5A4))
- Raytheon Aircraft Company H18 ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Raytheon Aircraft Company H35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))

All 137: https://openairdocs.org/stc/SA660WE/models.md

## 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.

1510"3 " i;lnitld ;::;tlltt5of \lJGt11U Bcparrmcllrof'[:rallspomrioll-jcdcral g,lliariollg,dmillisrrarioll ~upplcmcntal1t~pc~crtifi(atc Akn~ SA660WE .:;],4 0 "/0'f-#,I,.,.-":J.J,,u~/4)0 HTLDivision-PacificScientific r .•.•,./0~;J,/hu/ /h~-..cfi«r~y~/,.,,"d .....~y/t,,'/,k~~y"/,. d,.,/~¥,.t":Y!IN"';:'''/' ".,'/h /h, ;;~'flhd,-'-",J ..."u/ r•..",h:;;-'-"'J 6/",...;:.,.,(.J/,.JIU'r'JfN/~,."""'''-,JlU'/.; Ih,,-...,,.,.,,.•.,,./h"",J.J,,""y,,,,-""'uu',,I.J'l-y~,./3 or 4a~/h". CivilAir .1/,y"t,I'/"NJ', J;o,,/.,,.

. 11.,/./ SeeMasterEligibilityListNo.660 SeeMasterEligibilityListNo.660 SeeMasterEligibilityListNo.660 ,,, ./"T" /' I.J 'Jo,/';"'" '/. ~Y/"_/''''Y'' r';/,d"Y' . nstallationof HRD-tyoefireextinguishingsystem inaccordancewith AmericanSt'.mdardAdvanceTechnologyLaboratoriesRMC InstrumentsSealedDrawingListNumbersas listedon sealedFAAApprovedMaster EligibilityListNo.660.

I..~iy""o/. ~n;:,rl __ .~#,,./j~,.lf,r,•./,.

P • i.../"",'/";',.,,.,.,,,,,/6N"/.;"'''J'' Theapprovalof thischangein typedesignapples basicallytotheaircraftmodelslistedon FAAApprovedMasterEligibilityList No.660andshouldnotbe extendedtootherspecificairplanesof thismodelon whichotherpreviouslyapprovedmodificationsareincorporated,unlessit is determinedthattheinterrelationshipbetweenthischangeandanyof thoseother previouslyapprovedmodificationswillintroduceno adverseeffectuponthe airworthinessof thatairplane.AmericanStandardAdvancedTechnology LaboratoriesRMCInstrumentsFAAApprovedAFMSupplementpersealedMaster .Wg.!~-lt4' ..LLs't.( •.1.&~j.9~/.1 u~,r;/, •.J /h;.A.L1(j/,. "':/0I'V"~IIJ;{""// J'Y?" ••"n in 'l/a/""I:t/J",.- ",.",/",..,...{ ';"'Vun,t ..{ ",.;(,.,( ....,.'" /"'uu"u/,",',, •.~,/, .•.4 ,/A",.,•.-iJ,-. ,oJ/,,/..!,;;h•.•.I,(y /h,- .,:1/,,,(,,,:;/h'/'.,. .-/ /h..

.'1,--'£.,...,/.(;/,.,-~,/,;,,,.r£/'"..."iJ/,..,,/'~'II.

27 April19611 ::1;,4'/;'1:1'/'",/"", 20 March1964 y~,/..-/..:J.uM""":

:;:,10~•.",,,,,I 15December1969;30Dec.19"11;

f . February4, 1987J#,/' d ••"''' ••/.. •• / '---" .(':IiY f'~.,...r/',." #//h",,ri/,,,,,,,.)/h'/,'" , . '1-~ (. \LV ...k (SIK1/flfun ) 7'~ Manager,WesternAircraft CertificationOffice (., Itlt ) An}' altnl'JtlOfl of tnu (ot,jimtt' IJ /'wliJhflbJ, !If II Jill' oj 110t nrutii"K Sf ,O()(),VI Im/uuull11ltni nut ,x{Hdl1lg 3 rmrs. 0' bllih.

FAA foo.•• 8110-2110-08) 11m fOII/""" nUl) h, 1'(JIujnr,d '" nu",dmUt 1I'lih ,.....1H 2/ .47.

( ~FAA APPROVED'-

MASTER ELIGIBILITY LIST NUMBER 660 \. . Sheet No. 3 -----t ." ~.

1 l. Beech 65; 65/80; 65/A80; A65 3A20 23404 23404 E 12/18/72 5/26/64 5/16/74 I , I 2. Beech 95; B95; B95A; D95A; 3A16 60-001 60-001 D 12/18/72 12/19/631 95-55; 95-A55 I "I 3. Cessna 175; 175A; 175B; 175C; 3A17 60-002 60-002 B 12/18/72 4/27/64I Pl72DI I 4. Piper PA-23; PA-23-160; lA10 60-003 60-003 C 12/18/72 4/27/64I .PA-23-235; PA-23-250 , '- • ."

5. Beech A35; B35; C35; D35; E35; A777 60-004 60-004 D 2/22/74 5/9/68 6/25/74 I F35; G35; 35RI -I I 6. Deleted I .7. Beech 50; B50; C50; D50; D50A; 5A4 & 23404. 23404 E 12/18/72 5/26/64 5/16/74D50B; D50C; D50E; E50; STC -F50; G50; H50; J50 SA76SW

8. Cessna 310; 310A; 310B; 31OC; 3A10 60-005 60-005 B 12/18/72 5/26/64 310D; 310F; 31OG; 310H;

E310H

9. Beech 65/A80; 65/80; 65; F50; 3A20 60-006 60-006 C 12/18/72 9/29/64 50; C50; 050A; D50B; & SA4 050C; 050E; E50; G50; L _ .• HSO; J50; B50; 050 . .-,'I' ,.

**FAA APPROVED**

MASTER ELIGIBILITY LIST NUMBER 660 Sheet No. 4 NO. MAKE MODEL TC NO. NO. DI\'G.NO. REV. DATE DATE REVISED

10. Beech D18C; D18S; E18S; 765 60-009 60-009 B 12/18/72 1/13/65 E18S-9700: G18S; Hl8;

C45G; TC45G; C45H; TC45H:

TC45J; JRB-6; SNB-5;

STC-SA111WE II. Cessna 421 A7CE 60-012 60-012 D 12/18/72 3/7/69;

i 12. Piper PA31 A8EA 60-014 60-014 C 12/18/72 8/15/69 11/19/71

13. Beech 56TC (Baron) . 3A16 60-013 60-013 B 12/18/72 4/24/70. -

14. Beech Model 60 Duke A12CE 30180002 30180002 C 12/18/72 9/3/70

15. Cessna T310P; T310Q - 3A10 30180005 30180005 D 12/18/72 9/15/70 10/26/70

16. Cessna 401; 401A; 401B; 402; A7CE 30180005_- 30180005 D 12/18/72 9/15/70 10/26/70402A; 402B .

I ,I 17. Cessna 310; 310A; 310B; 310C; 3A10 30180007 30180007 D 12/18/72 10/2/70 310D; 310F; 31OG; 310B; .3101; 310J; 31OJ-1: -E310J; 310K; 310L; 310N; . -,.

310P; 310Q . -..

18. Cessna nOD; 320E: 320F 3A25 30180005 30180005 D 12/18/72 9/15/70 10/26/70- ~ -19. Cessna 414 .> A7CE 30180008 30180008 D 10/25/75 11/9/70 12/12/75

- -20. Cessna 421; 421A; 421B , A7CE 30180006 30180006 G' 09/15/76 11/19/70 .' . .- - . .•..-. ' - '.. ,

**FAA APPROVED**

MASTER ELIGIBILITY LIST NUMBER 660 Sheet No. 5 ,',

**AIRCRAFT SEALED DRAWING LIST AFM SUPPLEMENT**

ITEM KIT NO. MAKE MODEL TC NO. NO. DWG. NO. REV. DATE DATE REVISED 2l. Beech Baron Model D55 3A16 30180009 30180009 £ 3.:~(1,~9 5/25/71

22. piper PA-31P (Pressurized) A8EA 30180015 30180015 C 12/18/72 7/1/71 ,

23. Cessna 340; 340A 3A25 30180008 30180008 D 10/25/75 11/9/70 12/12/75 I24. Beech 65; A65; 65/80; 65/A80; 3A20 30180021 30180021 B 2/21/74 9/22/7265/BBO

25. Beech Model 60 Duke A12CE 30180026 30180026 A 10/24/72 1/12/73

26. Beech 65; A65; 70; 65-80; 3A20 30180022 30180022 C 3/20/74 5/16/73 65-A80; 65-B80

27. Beech 50; B50; C50; D50; D50A; SA4 30180030 30180030 - 3/7/73 5/16/73 D50B; D50C; D50E; E50;

t F50; G50; HSO; J50.

28. 3A15 30180046 30180046 2/25/74 6/25/74Beech V-35 -

29. Beech H-35; J-35;K-35; M-35; 3A15 30180047 30180047 - 3/12/74 6/25/74 N-35; P-35; 35-33;

35-A33; 35-B33; V-35A ~'

30. Piper PA-24; PA-24-250; lA15 30180049 30180049 B 8/23/74 11/19/74• PA-24-400; PA-24-260 .- .',- 3l. Aero Cdr. 680; 68GE; 720 2A4 30180028 30180028 B 6/11/74 7/31/74 "",..--, , p'. •••.

Sheet No. 6

**FAA APPROVED**

MASTER ELIGIBILITY LIST NUliffiER 660 -

**AIRCRAFT SEALED DRAWING LIST AFM SUPPLEMENT**

**ITEM KIT NO. IIIAKE MODEL TC NO. NO. DWG. NO. REV. DATE DATE REVISED**

32. Cessna 337; 337A; 3378 ;1113378;T3378; A6CE 30180020 30180020 C 1/15/75 8/28/75 337C; T337C ;3370 ;T 3370; 337E;

T337E; T337F; 337G; T337G : 33. Cessna 310R 3AI0 30180051 30180051 _ C 81;UJJ8. 11/11/74, I 34. Deleted

35. Deleted , 36. Deleted

37. Deleted

38. DeHavilland DHC-2 806 30180072 30180072 0 lfJ/xa/77 5/17/76 , 39. Deleted.

40. Tetstream HP137. STC SA2293SW A2IEU 30180067 30180067 B 11/22/76 1/18/77

41. Cessna T210F. T210G. T210H ,T21OJ, 3A21 30180044 30180044 C 11/05/76 6/07/77 T210K, T210L, T210M Piper .-42. PA-23-250C, -250D. -250E, lAI0 30180060 30180060 C 8/02/77 7/28/78 -250F ,. .

DeHavilland ,

43. DHC:-2 806 30180072-1 30180072-1 B 12/07/79 12/07/79 .

## Every issue (1)

- February 4, 1987: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ec/63/ec6315abe6ade9a992f7d2267dd680d605fcead31e01a1f6f8674ceca0ff6758)

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