ST00921SE
Installation of Rockwell Collins Communications Management Unit (CMU) for Controller Pilot Data Link Communications and VHF voice and data operations in accordance with American Airlines document ECO C1940XX, revision new, or later FAA approved revision. Held by American Airlines INC, which holds 377 approved modifications in all. Last revised May 29, 2001. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company
- Models
- 767-300 Series
- Type certificate
- A1NM
- On this site
- Boeing 767 584 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 22, 2026.