SA1633GL
Installation of Norton Radome P/N 4812X. Held by Norton Company, which holds 39 approved modifications in all. Last revised August 6, 1991. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Aerospatiale (Societe Nationale Industrielle Aerospatiale); Aerospatiale (Societe Nationale Industrielle Aerospatiale); Aerospatiale (Societe Nationale Industrielle Aerospatiale); Aerospatiale (Societe Nationale Industrielle Aerospatiale); Aerospatiale (Societe Nationale Industrielle Aerospatiale)
- Models
- ATR42-300, ATR72-201, ATR72-101, ATR42-320, ATR42-200
- Type certificates
- A53EU, A53EU, A53EU, A53EU, A53EU
- On this site
- Aerospatiale/Aeritalia ATR 42 16 registered
Aerospatiale ATR 72 9 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.