SA2778NM-D
Activation of full TCAS provisions previously installed by United Air Lines Change Order Authorization COA 7-3289 and certified under Supplemental Type Certificate STC SA2775NM-D in accordance with United Air Lines DAS-1-WE Approved Master Drawing List No. 2778, dated December 13, 1990, or later FAA approved revision. United Air Lines AFM Supplement to FAA Approved Flight Manual D6-8728-222 dated December 13, 1990, or later approved revision, is required as part of this installation. Held by United Airlines INC, which holds 520 approved modifications in all. Last revised November 30, 2011. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company
- Models
- 727-200 Series
- Type certificate
- A3WE
- On this site
- Boeing 727 37 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.