ST03081AT
Installation of an Emergency Locator Transmitter (ELT) System. Held by Avionics Support Group INC, which holds 8 approved modifications in all. Last revised June 27, 2007. System: emergency equipment.
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; McDonnell Douglas Corporation; McDonnell Douglas Corporation
- Models
- 737-300 Series, 737-400 Series, 737-500 Series, 737-600 Series, 737-700 Series, 737-800 Series, 757-200 Series, 757-300 Series, DC-9-82, DC-9-83
- Type certificates
- A16WE, A16WE, A16WE, A16WE, A16WE, A16WE, A2NM, A2NM, A6WE, A6WE
- On this site
- Boeing 737 2,892 registered
Boeing 757 440 registered
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 20, 2026.