Commonwealth legislation

AD/F100/9 - Forward Partial Pressure Bulkhead

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Commonwealth

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legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive orders operators of listed Fokker F100 (F.28 Mk.0100) aircraft to fit doubler assemblies at two forward partial-pressure bulkhead valve fittings, following the specified Fokker Service Bulletin. CASA set an effective date (22 April 1999) and requires compliance before the aircraft reach 15,000 flight cycles if not already done. The stated aim is to prevent cracks and raise the bulkhead fatigue life above 45,000 cycles; aircraft operators pay for and schedule the modification.

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AD/F100/9 - Forward Partial Pressure Bulkhead

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Fokker F100 (F28 Mk 100) Series Aeroplanes

AD/F100/9 Forward Partial Pressure Bulkhead 4/99

Applicability: F.28 Mk.0100 aircraft, serial numbers 11244 through 11286, 11289, 11291 through

11293, 11295, 11297, 11300, 11303, 11306 and 11308.

Requirement: Install new doubler assemblies at the avionics cooling outlet valve fitting on the LH forward partial pressure bulkhead, in accordance with Part 1 of the Accomplishment Instructions of Fokker Service Bulletin (SB) F100-53-052 dated 17 January 1992 and at the cargo bay outlet valve fitting on the RH forward partial pressure bulkhead, in accordance with Part 2 of the Accomplishment Instructions of Fokker SB F100-53- 052 Revision 1 dated 7 June 1993.

Note: RLD BLA 92-029/2(A) refers.

Compliance: Unless previously accomplished, before accumulating 15,000 flight cycles since new.

This Airworthiness Directive becomes effective on 22 April 1999.

Background: During fatigue tests on the F.28 Mk.0100, cracks were found in the area of the avionics cooling outlet valve fitting. This AD requires a modification to prevent cracks developing in service and to improve the fatigue life of the affected structure to above 45,000 flight cycles.

Source text

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

1 AD/F100/9 - Forward Partial Pressure Bulkhead