Applicability: CFM International CFM56-2 series, -3 series, -5 series, and -7B series engines with fuel filters, Western Filter part numbers (P/Ns) WF337661 and WF337017 and PTI Technologies P/Ns 7595983-101 and 7588133, installed.

Requirement:

1. CFM56-7B engines: Replace fuel filter, Western Filter P/Ns WF337661 or WF337017 and PTI Technologies P/Ns 7595983-101 or 7588133, with a filter that has a P/N not listed in this AD.

2. CFM56-2 series, -3 series, and -5 series engines: Replace fuel filter, Western Filter P/Ns WF337661 or WF337017 and PTI Technologies P/Ns 7595983- 101 or 7588133, with a filter that has a P/N not listed in this AD.

3. Do not install any fuel filter, Western Filter P/Ns WF337661 or WF337017 or PTI Technologies P/Ns 7595983-101 or 7588133.

Note: FAA Airworthiness Directive 2006-26-01 Amendment 39-14859 refers.

Compliance:

1. Within 600 flight hours or 60 days after the effective date of this AD, whichever occurs first,

2. At the next filter change or 4,000 flight hours, whichever occurs first, after the effective date of this AD,

3. After the effective date of this AD.

This Airworthiness Directive becomes effective on 3 January 2007.

Background: This AD results from 12 reports of failed fuel filters. Failure of fuel filters may result in loss of engine thrust, which in turn, may result in loss of aircraft control during takeoff or landing.

FMI: www.casa.gov.au