The U.S. aircraft register, updated daily
Special conditions

SPECIAL CONDITIONS; Gates Learjet Models 54, 55, and 56 Series Airplanes

Special conditions are rules the FAA writes for one design when the standard certification rules do not cover something new about it. These were for Learjet INC. System: other and general.

What it applies to

Applicant
Learjet INC
Makes
Learjet
Models
—
Effective
March 9, 1981
The FAA's document
On the FAA's site

The FAA's summary their words, unchanged

These special conditions are issued pursuant to § 21.16 and § 21.101 of the Federal Aviation Regulations (FAR) to Gates Learjet Corporation (Learjet) for the amended type certification of the Learjet Models 54, 55, and 56 series airplanes. These airplanes will have novel or unusual design features associated with the unusually high operating altitude (51,000 feet) for which the applicable airworthiness regulations do not contain adequate or appropriate safety standards. These special conditions are therefore necessary to establish a level of safety equivalent to that established in the regulations.

Source: FAA special conditions (final) from the Dynamic Regulatory System; the Federal Register carries the same notices.