AD/BR700/8 High Pressure Compressor (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.

Rolls Royce Germany Turbine Engines - BR700 Series

AD/BR700/8 High Pressure Compressor 4/2007 TX

Applicability:

BR700-715A1-30, BR700-715B1-30 and BR700-715C1 engines.

Note 1:  These engines are installed in but not limited to Boeing 717 aircraft.

Requirement:

Amend the Time Limits Manual (TLM) T-715-3BR by adding specific CAUTION notes to the subtasks listed below in order to include the mandatory reduced lives.

Subtask 05-10-01-860-004

Subtask 05-10-01-860-018

Subtask 05-10-01-860-033

Subtask 05-10-01-860-052

Alert Non-Modification Service Bulletin SB-BR700-72-A900437 initial issue or later approved revisions provides a list of the affected serial numbers and their reduced lives.

Note 2:  EASA Emergency AD 2007-0050-E dated 26 February 2007 refers.

Compliance:

Before further flight following the incorporation of repair BRG3086 Issue 1.

This Airworthiness Directive becomes effective on 2 March 2007.

Background:

Repair scheme BRG3086 Issue 1 instructs the repair of the High Pressure (HP) Compressor Front Drum Assembly Damping Grooves.  This repair has an impact on the life of the HP Compressor Front Drum Assembly.  This AD requires the incorporation of caution notes to the TLM instructing a reduced life limit for certain serial number HP Compressor Front Drum Assemblies.

David Punshon
Delegate of the Civil Aviation Safety Authority

27 February 2007