COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Beechcraft 55, 58 and 95-55 (Baron) Series Aeroplanes
AD/BEECH 55/71 Hawker De Havilland Restraint System 11/88
Applicability: All models fitted with a restraint system installed in accordance with Hawker De Havilland Drawing 05-F-670.
Requirement: Inspect for corrosion damage occurring in the structure at the upper torso restraint attachment under the bolt head AN 970-3 washer. Repair as necessary in accordance with a scheme approved by the Authority.
Compliance: At the next inspection for Maintenance Release issue after 3 November 1988.
Background: Three consecutively inspected aircraft modified in accordance with the De Havilland drawing have been found with corrosion under the steel AN 970-3 ‘penny’ washer. In all cases the corrosion would have allowed separation of the upper attachment under load.