SA4839NM
Installation of provisions for wiring and hardware for Honeywell Traffic Alert and Collision Avoidance System (TCAS II). Held by Acss (Aviation Communication and Surveillance Syst, which holds 33 approved modifications in all. Last revised February 28, 2002. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company; The Boeing Company; The Boeing Company
- Models
- 757-200PF Series, 757-200CB Series, 757-200
- Type certificates
- A2NM, A2NM, A2NM
- On this site
- Boeing 757 440 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.