# STC SA845NW

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Tramco Inc, United States
- Description: Installation of a single Canadian Marconi CMA-771 Omega Navigation System consisting of the P/N 473-157-001 receiver processor unit, the P/N 412-490-004 control display unit, and the P/N 418-334-001 Omega/ADF antenna coupler.
- Applied: August 7, 1979
- Status date: February 10, 2009
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/00/14/0014b36ed0ab32dbe328f13a4ae17d1f4eaf0d729f40d052161959d9cbdaecc0
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DC2ECBF7B2F9CF188625760E007163E8.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA845NW

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 727-200 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))

## 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.

1ilniud,stattlloramerica Bepartmentofl:mnspormtion-federal 2l11iation2ldministration ~upplcmcntal1[~pc(icrtificatc /4 SA845NW .~..?ub/~Pn.j;

&""ju~na/f//v-rhu:/-~",,'-~'/0'~~/u'J/~n/.e,.-:

vlt,h" vlt,/,-// A3WE Boeing 727-200 SURRENDERED9hi<N;;4,>n'~%YI",g'<J:Yn'Gha':r" Installationof a singleCanadianMarconiCMA-771Omega NavigationSystemconsistingof the piN 473-157-001receiverprocessorunit, the piN 412-490-004 controldisplayunit, and the piN 418-334-001Omega/ADFantennacouplerin accordancewith FAA sealedTramcoMasterDocumentList No. D79004RevisionD dated October10, 1979. FAA approvedAirplaneFlightManual Supplement dated October10, 1979,is requiredas part of this installation.

The approvalof this changein type designappliesbasicallyto the above model aircraftonly. This approvalshouldnot be extendedto otheraircraft of this model on which other previouslyapprovedmodificationsare incorporatedunlessit is determinedthat interrelationshipbetweenthis changeand any of those other previouslyapprovedmodificationswill introduceno adverseeffectsupon the airworthinessof that aircraft.

October10, 1979 / (Signlltu" ) Chief,Engineeringand ManufacturingBranch (Till,) A ny alteration of this certificate is punishable ~)! a .fine of not excuding SI ,000, or imprisonment nol exceeding 3 )'ears, or both.

This uTtificat, rna.>'b, tmnsfnud in Qao,danu with FAR 21.47.

FAA fOlM 8110-2 (10-68)

## Every issue (1)

- February 10, 2009: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/00/14/0014b36ed0ab32dbe328f13a4ae17d1f4eaf0d729f40d052161959d9cbdaecc0)

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