Commonwealth legislation

AD/EMB-110/44 Amdt 3 - Elevator Trim Actuator Support

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This Airworthiness Directive requires operators of Embraer EMB‑110 aeroplanes to remove the elevator trim actuator for inspection every 300 flight hours until an improved actuator support fitting (P/N 110‑3210‑25) is installed. The retrofit must be completed within 1,200 hours to terminate the recurring inspections. It responds to in‑flight flutter and detected cracking and cross‑references a Brazilian AD and Embraer service information. Operators pay for inspections and the retrofit; the regulator enforces the stated compliance intervals (Requirement; Compliance; Background).

JSON API

Deep dive

Want the full deep dive?

Zoe can write the in-depth analysis on top of the summary above: how it works, who it affects and what each part actually does.

Current sections

Direct links to the current provisions in AD/EMB-110/44 Amdt 3 - Elevator Trim Actuator Support.

AD/EMB-110/44 Amdt 3 - Elevator Trim Actuator Support

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source
Embraer EMB-110 (Bandeirante) Series Aeroplanes

AD/EMB-110/44

Amdt 3

Elevator Trim Actuator Support 5/93

Applicability: Model EMB-110 series aircraft.

Requirement: 1. Action IAW the Technical Requirements of Brazilian AD T91-07-02.

The trim actuator shall be removed to facilitate this inspection.

Install a P/N 110-3210-25 actuator support fitting.

Note 1: 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.

Note 2: CTA AD 93-02-01 and Embraer ASB 110-027-A090 refer.

Compliance: 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.

Unless already accomplished, within 1200 hours TIS after 29 April 1993.

Background: 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.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.

1 AD/EMB-110/44 Amdt 3 - Elevator Trim Actuator Support