SA2421WE
Installation of 600 gallon extended range fuel tankage in forward freight hold. Held by Qualitron INC, which holds 2 approved modifications in all. Last revised September 17, 1971. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- British Aerospace Airbus Limited; British Aerospace Airbus Limited
- Models
- BAC 1-11 200 Series, BAC 1-11 400 Series
- Type certificates
- A5EU, A5EU
- 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.