STC SA420SW

Supplemental type certificate · Braniff Airways Inc

Holder
Braniff Airways Inc · United States
Status
Current · Reissued
Status date
June 26, 1969
Applied
August 13, 1964
Product
Aircraft · Large Airplane
Certification basis
Part 21
Data sheets
TCDS4A21TCDS4A28

From FAA DRS, with our copy of the certificate PDF. DRS record last changed December 5, 2025.

What it approves

Install Dual Collins FD-108 flight director system replacing Collins ID -105 Flight Director System having dual instrumentation with single steering computer

What the certificate says

From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.

ftirittd States of america Bepartmcnt of transportation— Jp'ederal 3toiation administration Supplemental t^uje Certificate BA4208W Braniff Airways, Inc. Pmipot vi64osw-SP. 0. BOX 35001 rrojecT, AJ.OHUDW o Dallas, Texas 75235 .1!^^^^1^^ 4b ^^iv CiVll Air iSltau£a/tvnfr.

4A21 and 4A28 : Boeing : 707-227, 720-027, 707-1388 Install dual coning JD-108 Flight Director System replacing Collins ID -105 Flight Director System having dual instrumentation with single steering computer according to Braniff Airways Engineering Change Release 15-6U dated 7/28/6U with Addenda 1 dated 8/6/6U, 2 dated 9/1/6U and 3 dated 9/3/6>j or replacing Bendix 300 Series according to EA Ho. 8-31-21, Rev. 1 dated 6/24/69, EA Ho. 8-31-218, Rev. 1 dated 6/2W69, SA Ho. 8-3^-6l, Rev. 1 dated 6/2U/69, EA Ho. 8-34-81 Section A dated 12/19/69, EA Ho. 8-3^-81 Section B dated 3/26/70.

1. FAA Approved Airplane Flight Manual Supplemental Revision Ho. 19 dated 10/20/64 required for Boeing 707-227"

2. FAA Approved Airplane Flight Manual Supplemental Revision Ho. 6 dated 9/16/64 required for Boeing 720-027*3. FAA Approved Airplane Flight Manual Supplemental Revision Ho. 1 dated 6/26/69 required for Boeing 707-138B.4. This equipment has not been evaluated for Category II performance.

ri& /w. August 13* 1964 £/•<,&.*,*&«,</: June 26, 1969 Revision 116, 1964 ^/a£e-atn*tu/t</:

(Signature) len V. Welsh Chief. Engineering and Manufacturing Branch(Title) ___

FAA Fout 81 10-2 (10-68)

ADs that name this STC · 0

An AD can apply because an STC is installed, or mention one in its text.

No AD in this release names this STC

Approved models · 4

MakeModelData sheet
The Boeing Company707-100B Long Body4A21
The Boeing Company707-100B Short Body4A21
The Boeing Company707-2004A21
The Boeing Company720 Series4A28