AD/ERJ-170/9 Low Stage Engine Bleed Check Valve (Cth)

AIRWORTHINESS DIRECTIVE

For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (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 ERJ-170 Series Aeroplanes

AD/ERJ-170/9 Low Stage Engine Bleed Check Valve 6/2007

Applicability:

Embraer ERJ-170 aircraft.

Requirement:

Replace the low stage engine bleed check valve Part Number (P/N) 1001447-3 with a new valve or one of the same P/N in accordance with Embraer Service Bulletin (SB) No. 170-36-0004 original issue or later CTA approved revisions.

Note:  Brazilian airworthiness directive 2005-09-03R1 dated 23 May 2006 refers.

Compliance:

-      For aircraft having logged 3000 or more flight hours at the effective date of this AD:

For Valves positioned in the Right Hand (RH) position, within 100 flight hours after the effective date of this AD.

For Valves positioned in the Left Hand (LH) position, within 300 flight hours after the effective date of this AD.

Thereafter at intervals not to exceed 3000 flight hours for both positions.

-      For engines that will be installed in either the RH or LH positions:

Before installing those engines on the aircraft after the effective date of this AD.

This Airworthiness Directive becomes effective on 7 June 2007.

Background:

An in-flight shutdown occurred due to the low stage bleed check valve failing to close due to excessive wear.  This AD requires the replacement of the low stage bleed check valve to preclude excessive wear and the failure of the valve.

David Punshon
Delegate of the Civil Aviation Safety Authority

24 April 2007