SA1672GL

Installation of Bendix/King EFS-10 electronic flight info sys(EFIS) comprised of 4 display units P/N 3614309-1006, 3 symbol generators P/N 3614335-2015, 3 Navigation concentrators P/N 3614331-2003, 2 EFIS control panels P/N 3614277-1060, 1CRS/HDG/CRS control panel setting control P/N 3605867-0501 and P/N 3614330-1002, and 1 RADALT/DH Collins FGS-80 flight guidance sys. Held by Abx Air Incorporated, which holds 64 approved modifications in all. Last revised March 31, 1994. System: instruments and avionics.

What it applies to

Kind of product: Aircraft
Design holder: McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation; McDonnell Douglas Corporation
Models: DC-9-31, DC-9-41, DC-9-34F, DC-9-34, DC-9-33F, DC-9-32, DC-9-51, DC-9-21, DC-9-15, DC-9-14, DC-9-13, DC-9-12, DC-9-11, DC-9-32F
Type certificates: A6WE, A6WE, A6WE, A6WE, A6WE, A6WE, A6WE, A6WE, A6WE, A6WE, A6WE, A6WE, A6WE, A6WE
On this site: Douglas DC-9 7 registered
Mcdonnell Douglas DC-9 93 registered
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 8, 2026.