Commonwealth legislation

AD/F28/63 Amdt 1 - Horizontal Stabiliser Attach Fitting

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Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This AD requires owners/operators of specified Fokker F28 serials to replace aluminium AL7079 horizontal‑stabiliser attach fittings with AL7075‑T73 fittings per RLD AD 92‑119 by the compliance date. It responds to stress‑corrosion cracking that could cause lug fracture and hazardous stabiliser movement.

Affected parties (operators, maintenance organisations and parts suppliers) bear replacement costs and scheduling burdens; the rule shifts risk mitigation from inspection to mandated material replacement.

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Current sections

Direct links to the current provisions in AD/F28/63 Amdt 1 - Horizontal Stabiliser Attach Fitting.

AD/F28/63 Amdt 1 - Horizontal Stabiliser Attach Fitting

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Fokker F28 Series Aeroplanes

AD/F28/63

Amdt 1

Horizontal Stabiliser Attach Fitting 5/93

Applicability: Model F28 series with serial numbers 11003 through 11151, and 11991 and 11992. Requirement: Action in accordance with the technical requirements of RLD AD 92-119.

Note: Fokker SB F28/55-29 refers.

Compliance: Prior to 1 November 1995.

Background: A report was received of a major crack in the RH upper lug of the horizontal stabilizer attach fitting. Investigation revealed that it was caused by stress corrosion, to which aluminium AL7079 is known to be sensitive. A crack could cause lug fracture and hazardous movement of the horizontal stabiliser.

Amendment 1 is issued to align this Directive with a new RLD AD which requires replacement of all aluminium AL7079 fittings with units made from AL7075-T73, which is less sensitive to stress corrosion.

Source text

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

1 AD/F28/63 Amdt 1 - Horizontal Stabiliser Attach Fitting