AD/EMB-110/8 Amdt 6 - Flap Actuators (Cth)

AIRWORTHINESS DIRECTIVE On the effective date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below revokes Airworthiness Directive (AD) AD/EMB-110/8 Amdt 5 and issues the following AD under subregulation 39.001(1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Embraer EMB-110 (Bandeirante) Series Aeroplanes AD/EMB-110/8 Amdt 6 Flap Actuators 15/2011

Applicability: Model EMB-110, equipped with flap linear actuators EEMCO P/N D-2246-3, D-2246-4, D-2246-5, D-2246-6, D-2246-31 and D-2246-41.

Requirement: Inspect and lubricate in accordance with Part I and Part II of Brazil SAR AD 82-07-04 R3 Amdt 39-691.

Compliance: For Part I of Requirement Document:

At intervals not to exceed 1500 landings or 12 months after 3 February 1992; whichever occurs first.

For Part II of Requirement Document:

At intervals not to exceed 4500 landings or 36 months after 3 February 1992; whichever occurs first.

No flap linear actuators EEMCO P/N D-2246-3 and D-2246-4 shall be installed on any aircraft after 3 February 1992.

The compliance times of the previous issue of this Directive are as stated.

This Amendment becomes effective on 25 July 2011.

Background: An incident occurred where a flap retracted under aerodynamic loads due to the failure of the flap linear actuator ball return tube, which was caused by the ingress of moisture. This resulted in a flap asymmetry situation which affected the safety of the flight.