1AD/F28/78 - Lap Joint at Stringer 16/17 and 58/59

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/F28/78 Lap Joint at Stringer 16/17 and 58/59 11/96

Applicability: Models F28 Mk. 1000 through to 4000 Series, S/Nos. 11017 to 11241 that do not have SB F28/53-121 incorporated.

Requirement: Action in accordance with Fokker SB F28/53-144.

Note: RLD AD 1996-081(A) refers.

Compliance: Unless already accomplished; on aircraft that have accumulated between:

25 000 and 32 000 flight cycles at 01 July 1996 \- before 10 December 1996;

b. 20 000 and 25 000 flight cycles at 01 July 1996 \- before 10 January 1997; and

c. 15 000 and 20 000 flight cycles at 01 July 1996 \- before 10 February 1997\. This Directive has effect from 10 October 1996.

Background: Cracking has been discovered in these lap joints before the inspection threshold mandated in the Structural Integrity Programme, and before the cycles threshold of AD/F28/75. This Directive requires a one time inspection of the area using the existing LFEC technique and if cracking is found, installation of a terminating repair.