COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Embraer EMB-110 (Bandeirante) Series Aeroplanes
AD/EMB-110/44
Amdt 3
Elevator Trim Actuator Support 5/93
Model EMB-110 series aircraft.
1. Action IAW the Technical Requirements of Brazilian AD T91-07-02.
The trim actuator shall be removed to facilitate this inspection.
2. Install a P/N 110-3210-25 actuator support fitting.
Cracks have also been found in the elevator spar adjacent to the mounting attachment holes, and in the lugs of the elevator trim tab support bracket.
CTA AD 93-02-01 and Embraer ASB 110-027-A090 refer.
1. Within 300 hours time in service after the last compliance with the previous issue of this Directive, and thereafter at intervals not to exceed 300 hours time in service; until compliance with Requirement 2.
2. Unless already accomplished, within 1200 hours TIS after 29 April 1993.
As the result of an in-flight flutter incident in Australia, checks were instituted and a number of aircraft were found to have significant damage. In-flight failure could lead to loss of the aircraft. Amendment 1 was issued to reflect the requirements of the Country of Origin AD which had been issued in response to cracking around the actuator support. Amendment 2 was issued following a review of the calendar time compliance requirement. Calendar time was not considered to be relevant to crack growth in this instance, and the Directive is therefore amended. Amendment 3 is issued in response to a new Brazil CTA AD which requires installation of an improved support fitting and thereby constitutes terminating action of the ongoing repetitive inspections.