Commonwealth legislation

AD/GROB 115/4 - Firewall Bonding Lead

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Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This airworthiness directive requires owners/operators of certain Grob G115A aircraft (S/N 8091–8109, except 8097, 8100, 8102) to replace the firewall bonding bolt plate with a modified part (P/No 115-9006) in accordance with GROB Service Bulletin TM 1078-18. The replacement must be completed within 25 hours time-in-service after 14 November 1991 to prevent possible reverse current that could damage wiring and other components.

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AD/GROB 115/4 - Firewall Bonding Lead

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source Grob G115 Series Aeroplanes

AD/GROB 115/4 Firewall Bonding Lead 11/91

Applicability: All G115A series aircraft S/No 8091 through 8109 inclusive, except S/Nos 8097, 8100 and 8102.

Requirement: Action in accordance with the technical requirements of GROB G115 Service Bulletin TM 1078-18.

Compliance: Within 25 hours Time in Service after 14 November 1991.

Background: 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).

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.