AD/LEARJET/25 - Automatic Flight Control System - Deactivation and Modification (Cth)

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

Gates Learjet 24 & 25 Series Aeroplanes

AD/LEARJET/25 Automatic Flight Control System - Deactivation and Modification

Applicability: All models 24 with S/Nos. 24-100 and subsequent; All models 25 with S/Nos. 25-003 and subsequent; All models 28 with S/Nos. 28-001 and subsequent; All models 29 with S/Nos. 29-001 and subsequent.

4/81 Requirement: 1. Deactivate the pitch function of the FC-110 Automatic Flight Control System (AFCS) or Automatic Flight Control Stability System (AFC/SS), as indicated below, by pulling the AFCS Pitch DC Circuit Breaker to the off position, banding it to prevent use of this function and checking to assure this function is the only deactivated circuit or control.

SERIES SERIAL NUMBERS LOCATION 24 100 thru 139 (except 131, 132 Pilot's Sub Panel & 134) 131, 132 & 134 Pilot's circuit breaker panel 140 thru 229 Autopilot computer rack (under pilot's seat) 230 and up Pilot's circuit breaker panel. 25 003 thru 069 (except 032) Autopilot computer rack (under pilot's seat) 032 Pilot's Sub Panel 070 and up Pilot's circuit breaker panel 28 001 and up Pilot's circuit breaker panel 29 001 and up Pilot's circuit breaker panel

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES

2. Install a locally fabricated placard on or near the autopilot control head in clear view of the crew using letters at least 3/32 inch high, which reads: