ST01394NY
Installation of a TCAS II Upgrade to Software Version 7. Approved for 747-230B serial numbers 21588, 21590, 21591, 21643, 22670, 23407, 23509, 23622, 22363, 22671, 23286, 23287, 23393, and 747-230F serial numbers 21592, 22668, 23348, 23621, and 24138. Held by Lufthansa Technik AG (Germany), which holds 110 approved modifications in all. Last revised September 26, 2001. System: instruments and avionics.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Boeing Company
- Models
- 747-200 Series
- Type certificate
- A20WE
- On this site
- Boeing 747 192 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 21, 2026.