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Aircraft STC directory

Boeing DC-8-21 STCs

The Jun 30, 2026 FAA DRS snapshot contains 28 selected supplemental type certificates with status Current whose public applicability data names the Boeing DC-8-21. Use it to identify modification scope and recorded holders—not to determine serial-number effectivity, compatibility, installation approval, or commercial availability.

28
listed Current at snapshot
7
holder directories
7
modification categories
Mar 6, 2026
latest recorded revision

Modification demand surface

Other aircraft modifications11Cabin and interiors10Safety and emergency equipment2Avionics2Electrical systems1Cargo and special mission1Landing gear and brakes1

Recorded holders

United Airlines Inc22Precise Flight Inc1Bruce Aerospace Inc.1Astronics Luminescent Systems Inc1Purolator Facet, Inc1Airborne Express Air Inc1DeVore Aviation Corporation of America, a New Mexico Corporation1

Recently revised DC-8-21 STCs

Showing the 28 most recently revised records. Each entry links to the FAA source and separates public approval data from private commercial claims.

SA1034WEAvionics

Installation control and annunciation circuitry to implement Flight Director "Go-Around" command modes in accordance with the UAL FAA approved drawing list dated August 11, 1965, revised August 16, 1965. UAL FAA approved Airplane Flight Manual Supplementary Log of pages as listed.\nType Manual Approved Dated Appendix\nDC-8-21, 31, 32, 33 SM 23889 1-19-60, 3-60, 2-1-60 and V\n 11-28-60 respectively\nDC-8-51, 52, 53 LB 30582 10-10-61, 4-28-61 and 4-28-61 resp. VII\nDC-8-51, 52, 53 LB 30757 1-26-62 IV\nDC-8F-54, 55 LB 31180 1-29-63, 6-19-64 respectively IV.

FAA holder: United Airlines Inc

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SA2827WE-DSafety and emergency equipment

Installation of Collins FPC-75 part number 622-2615-012 or 622-2615-212 Ground Proximity Warning System Computer in conformance with United Airlines DAS-1-WE Approved Master List of drawings and documents for STC No. SA2827WE-D dated February 26, 1979 or later approved revisions. An alternate approved configuration consists of part number 622-2615-011 Rev. N or part number 622-2615-211 GPWS computer and a part number 622-2668-011 Barometric Altitude Computer installed in conformance with DAS-1-WE Approved Master List of drawings and related documents or later FAA approved revision (Continued on page 3.).

FAA holder: United Airlines Inc

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SA305EAOther aircraft modifications

A) Inflight Motion Picture System provisions in accordance with Lockheed Report 2580, Rev. 7, dated October 1964 and Electro Magnetic Compatibility, Lockheed Report 2573, Rev. 2, dated October 1964. (Report 2580 Rev. 7 dated October 1963 is equivalent to EM 1800 Section Report 2580 Rev. 20 dated November 1964). (B) Inflight Motion Picture System provision in 3 Class DC-8 in accordance with EM 1801 Section of Lockheed Report 2580 Rev. 30, December 1964 and Electro Magnetic Compatibility Lockheed Report 2573, Rev. 9, dated November 1964. This installation must be accomplished on aircraft with STC SA759WE installed. (Report 2580 Rev. dated December 30, 1964, same as Rev. dated December 10, 1964, with E.O. 19472, 19473, 19474, 19475, 19487). ( See Continuation on Page 3).

FAA holder: United Airlines Inc

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SA4-918Landing gear and brakes

1. Aircraft wiring in accordance with Douglas Aircraft Co. Service Change #17 (UAL COA-0-1456) to provide an operational Aircraft Flight Data Rrecorder conforming to CAR Amendment 40-6, paragraph 40.208 with the following additions to assure recording of data during takeoff and landing roll: \na.\tRelay to provide automatic start of recording when nose landing gear reaches airborne condition on takeoff.\nb.\tTime delay relay to turn off recorder one minute after nose landing gear reaches "on ground" condition, on landing.\nc.\tInstallation of standard toggle switch on Systems Engineer's Console, to permit Second Officer to turn on recorder at start of takeoff run.\n2. Install Waste King Flight Data Recorder #5424, TSO-C51.

FAA holder: United Airlines Inc

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