SA1553NM
Installation of one or two 90 US gallons fuselage auxiliary fuel tank(s), in accordance with Branson List of Drawings and Documents, No. 61A000, Revision B, FAA approved May 16, 1983, or later FAA approved revision. Held by Avcon Industries INC, which holds 121 approved modifications in all. Last revised June 3, 2010. System: fuel system.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Learjet Inc.; Learjet Inc.; Learjet Inc.
- Models
- Learjet 55C, Learjet 55B, Learjet 55
- Type certificates
- A10CE, A10CE, A10CE
- 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.