SA603EA
Addition of a 32 inch high door on L.H. side of fuselage between fuselage stations 244 - 261 in accordance with drawings and instructions listed in: 1. Reading Aviation Service, Incorporated Drawing List No. 2276 Revision C dated April 10, 1970. 2. Reading Aviation Service, Incorporated Installation Instructions, Sheet No. N2276, Revision A dated June 27, 1968. Held by Black Cat Aviation INC., which holds 6 approved modifications in all. Last revised June 27, 2003. System: airframe structure.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The New Piper Aircraft Inc.; The New Piper Aircraft Inc.
- Models
- PA-31, PA-31-300
- Type certificates
- A20SO, A20SO
- On this site
- Piper PA-31 Navajo and Chieftain 935 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 22, 2026.