SA4-1510
Substitution of rectangular windows in place of round windows in cabin. (3TM CAR 3). Held by Aerospace Products, INC, which holds 37 approved modifications in all. Last revised February 14, 1969. System: cabin, seats and restraints.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company
- Models
- C18S (Navy JRB-3), C18S (Navy JRB-4), C18S (Navy JRB-2), C18S (Army C-45), C18S (Navy SNB-2), C18S (Navy JRB-1), C-45G, D18S, TC-45G, C-45H, TC-45H, 3TM, UC-45J (SNB-5), JRB-6, 3N, 3NM
- Type certificates
- A-757, A-757, A-757, A-757, A-757, A-757, A-765, A-765, A-765, A-765, A-765, A-765, A-765, A-765, A-765, A-765
- On this site
- Beechcraft TC-45 7 registered
Beechcraft UC-45 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 20, 2026.