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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Grob G115 Series Aeroplanes
AD/GROB 115/4 Firewall Bonding Lead 11/91
All G115A series aircraft S/No 8091 through 8109 inclusive, except S/Nos 8097, 8100 and 8102.
Action in accordance with the technical requirements of GROB G115 Service Bulletin TM 1078-18.
Within 25 hours Time in Service after 14 November 1991.
Grob have advised that during engine start, there is a possibility that a high resistance may occur at the bonding lead assembly mounted at the firewall.
This may cause a reverse current to occur which may damage wiring and other aircraft components. To prevent this, the existing bonding bolt plate must be replaced with a modified bonding bolt plate (P/No 115-9006).