COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES British Aerospace (Hawker Siddeley) HS 748 Series Aeroplanes AD/HS 748/18 Amdt 1 Elevator Outboard Hinge Structure 2/98 Applicability: All HS748 aircraft fitted with elevators P/N 1G3096 and 400G3096. Requirement: 1. (a). Visually inspect, both internally and externally, each elevator in the region of the outboard hinge for repairs or existing damage. Inspect in accordance with British Aerospace Mandatory Service Bulletin (MSB) 55/24, Part 2.A. 1. (b). For repaired elevators, before the initial inspection, incorporate access panel E11 in accordance with British Aerospace MSB 55/24, Part 2.B. Visually inspect, both internally and externally, each repaired elevator in the region of the outboard hinge for cracking, loose rivets and buckling. Inspect in accordance with British Aerospace MSB 55/24, Part 2.B. 2. For all elevators, perform a close visual internal inspection in accordance with British Aerospace MSB 55/24, Part 2.C. Note: CAA (UK) AD 003-04-87 refers. Compliance: 1. Initially inspect all elevators in accordance with Requirement 1.(a) and, if repaired, Requirement 1.(b) before 25 June 1995. 2. Initially inspect all elevators in accordance with Requirement 2 before 5000 hours time in service or 7000 landings, whichever occurs first. Repeat at intervals not to exceed 5000 hours time in service or 7000 landings, whichever occurs first. The compliance of the original issue is changed with respect to the initial and repeat inspection periods, to align with the CAA (UK) AD. This amendment becomes effective on 29 January 1998. Background: An incident has been reported in which an aircraft lost the outboard section of the elevator in flight. The failure originated from damage associated with an earlier incident. Examination of other undamaged elevators indicated loose rivets cracking and wear in the subject area. Amendment 1 is issued to correct an anomaly in the compliance initial and repetitive inspection periods. The original issue of this airworthiness directive became effective on 25 May 1995.