Document ID: chunk:federal_register_of_legislation:F2006B09705:body:0
Version: federal_register_of_legislation:F2006B09705
Segment Type: other
Provision Reference: 
Character Range: 0–1391

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

 Fokker F27 Series Aeroplanes

AD/F27/138 Wing Lower Skin at Stringers 4 to 7 2/95

Applicability: All F27 aircraft (except Mk 050).

             Requirement: 1. Perform an X-ray inspection of the wing lower surface stringers 4 to 7 at Wing Stations (WS) 11260, 11860, 12660, and 13460. Inspect in accordance with Fokker Service Bulletin (SB) F27/57-70 paragraph 2 part 2.

             2. Modify the wing lower surface rib to stringer connections where stringers 4 to 7 join to the ribs at WS 11260, 11860, 12660, and 13460. Modify in accordance with Fokker SB F27/57-70 paragraph 2 part 1.

Note: RLD AD 93-094(A) refers.

             Compliance: 1. Inspect in accordance with Requirement 1 before 30000 flights or within 2000 flights after 2 February 1995 whichever is the later. Re-inspect at intervals not to exceed 4000 flights until modified in accordance with Requirement 2.

             2. Modify in accordance with Requirement 2 before 30000 flights or before 31 July 1996 whichever occurs later.

            Background: When incorporating SB F27/57-68 (cracking of wing upper surface stringers) some operators discovered cracking in the lower surface stringers. Inspection and modification are required to resolve the problem.