The U.S. aircraft register, updated daily
Approved modifications · supplemental type certificate · current · reissued

SA1034WE

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. Held by United Airlines INC, which holds 520 approved modifications in all. Last revised November 30, 2011. System: other and general.

What it applies to

Kind of product
Aircraft
Design holder
The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company; The Boeing Company
Models
DC-8-21, DC-8-31, DC-8-32, DC-8-33, DC-8-51, DC-8-52, DC-8-53, DC-8-55, DC-8F-54
Type certificates
4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25, 4A25
The FAA's record
On the FAA's site

What an approved modification is

A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.

Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 20, 2026.