Commonwealth legislation

AD/F27/139 - Outer Wing Rib-to-Stringer Connections

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

3/10 complexity

This Airworthiness Directive orders operators of Fokker F27 aircraft S/N 10653–10692 (unless they’ve already incorporated specified Fokker service bulletins) to inspect wing rib-to-stringer connections for loose or missing rivets and to replace lower-strength MS20600AD4W2 rivets with CR3553P4 rivets (Requirements 1–2). Operators pay for inspections, parts and work, must follow Fokker SB F27/57-74 Parts 1–2, and meet the flight-count or calendar deadlines in the AD (Applicability; Compliance; Background).

JSON API

Deep dive

Want the full deep dive?

Zoe can write the in-depth analysis on top of the summary above: how it works, who it affects and what each part actually does.

Current sections

Direct links to the current provisions in AD/F27/139 - Outer Wing Rib-to-Stringer Connections.

AD/F27/139 - Outer Wing Rib-to-Stringer Connections

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
Fokker F27 Series Aeroplanes

AD/F27/139 Outer Wing Rib-to-Stringer Connections 3/95

Applicability: F27 aircraft, S/N 10653 to 10692 inclusive, without Service Bulletins F27/57-68 Part 1 and F27/57-70 Part 1 incorporated.

Requirement: 1. Visually inspect the wing upper and lower skin rib-to-stringer connections at wing stations 11260, 11860, 12660 and 13460 for loose and missing rivets. Inspect in accordance with Fokker Service Bulletin (SB) F27/57-74 Part 2.

Replace P/N MS20600AD4W2 rivets at the wing upper and lower skin rib-to- stringer connections with P/N CR3553P4 rivets. Replace rivets at wing stations 11260, 11860, 12660 and 13460 in accordance with Fokker SB F27/57-74 Part 1.

Note: Netherlands RLD AD BLA94-148(A) refers.

Compliance: 1. Inspect before 10 000 flights or before 2 May 1995, whichever occurs later.

Replace rivets before 10 000 flights or before 1 December 1995, whichever occurs later.

Background: Several F27 operators have reported missing rivets at the rib-to-stringer connections. Investigation revealed that lower strength MS2060AD4W2 rivets had been installed in production on certain serial number aircraft.

Source text

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

1 AD/F27/139 - Outer Wing Rib-to-Stringer Connections