COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Fokker F100 (F28 Mk 100) Series Aeroplanes AD/F100/36 Fire Extinguisher Electrical Connectors 1/2000 Applicability: Model F.28 Mk.0070 and Mk.0100 aeroplanes. Requirement: 1. Perform a resistance check on engine and auxiliary power unit (APU) fire extinguisher electrical connectors in accordance with Part A of the Accomplishment Instructions of Fokker Service Bulletin (SB) F100-26-015 dated 15 August 1999. 2. If a short circuit is detected during the Requirement 1 check, inspect and, if necessary, modify the affected connectors in accordance with Part B (paragraphs C through H) of the Accomplishment Instructions of SB F100-26-015. 3. If a short circuit is not detected during the Requirement 1 check inspect and, if necessary, modify the affected connectors in accordance with Part B (paragraphs C through H) of the Accomplishment Instructions of SB F100-26-015. Note: Netherlands RLD AD 1999-110 (A) refers. Compliance: 1. Within 12 calendar months from the effective date of this Directive. 2. Before further flight. 3. At the next scheduled weight check of the fire extinguisher bottle or within two years after the Requirement 1 check, whichever occurs first. This Airworthiness Directive becomes effective on 31 December 1999. Background: Fokker has advised of reports that APU and engine fire extinguisher electrical connectors were found shorted. Investigation revealed that solder connectors were not insulated by a grommet or shrink sleeves. Additionally, a short circuit cannot be detected by the current Aircraft Maintenance Manual resistance checks. This condition, if not corrected, may result in disabling of the affected fire extinguisher system.