AD/CF34/13 Uncontained Fan Disk Failure (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.

General Electric Turbine Engines - CF34 Series

AD/CF34/13 Uncontained Fan Disk Failure 4/2007 TX

Applicability:

General Electric Aircraft Engines (GE) CF34-3A1/-3B/-3B1 turbofan engines that have fan disks with serial numbers (SNs) listed in Table 1 of this AD.  Affected regional jet fan disk part numbers (P/Ns) are 5922T01G04, 5922T01G05, 6078T57G01, 6078T57G02, 6078T57G03, 6078T57G04, 6078T57G05, and 6078T57G06.  Affected business jet fan disk P/Ns are 5921T18G01, 5921T18G09, 5921T18G10, 5921T54G01, 5922T01G02, 5922T01G04, 5922T01G05, 6020T62G04, 6020T62G05, 6078T00G01, 6078T57G01, 6078T57G02, 6078T57G03, 6078T57G04, 6078T57G05, and 6078T57G06.

Note 1:  These engines are installed on, but not limited to, Bombardier, Inc.
CL-600-2B16 (CL-601-3R Variant), CL-600-2B16 (CL-604 Variant), and
CL-600-2B19 (Regional Jet Series 100 and 440) model aeroplanes.

Table 1 - Fan Disk SNs and Last Known
Associated Engine Serial Number (ESN).

SN (Fan Disk)	ESN (Current)
GEE148JH	872787
GEE01629	807168
GEE01888	807188
GEE147MF	807620
GEE147NA	807622
GEE147V5	807624
GEE147VC	807625
GEE148JG	807633
GEE145LL	872526
GEE145NK	872545
GEE1466F	872563

GEE1466L	872568
GEE146H3	872599
GEE146KD	872604
GEE146N7	872634
GEE147N7	872705
GEE147N8	872709
GEE14818	872727
GEE14815	872730
GEE1480J	872731
GEE1485J	872745
GEE1480F	872750
GEE14885	872763
GEE148EJ	872780
GEE148FT	872785
GEE148ER	872790
GEE148PN	872804
GEE148RN	872811
GEE148TW	872817
GEE03675	SPARE
GEE148R0	SPARE

Requirement:

Perform a onetime visual and tactile inspection of the bore area on the 31 fan disks listed in Table 1 of this AD, that have not had a shop-level inspection.

-      For regional jet engine models CF34-3A1/-3B1, use paragraphs 3.A through 3.B.(2)(g) of the Accomplishment Instructions of GE Alert Service Bulletin No. CF34-AL S/B 72-A0232, dated 15 February 2007, to do the inspections.

-      For business jet engine models CF34-3A1/-3B, use paragraphs 3.A through 3.B.(2)(g) of the Accomplishment Instructions of GE Alert Service Bulletin No. CF34-BJ S/B 72-A0213, dated 15 February 2007, to do the inspections.

Note 2:  FAA Emergency AD 2007-04-51 dated16 February 2007 refers.
Compliance:	Within 20 engine flight hours after the effective date of this AD, unless the actions have already been done.
This Airworthiness Directive becomes effective on 2 March 2007.
Background:	This AD results from a report that a GE CF34-3B1 turbofan engine experienced an uncontained fan disk failure during flight operation.  The issuing of this AD to detect electrical arc-out defects on fan disks, which could result in uncontained fan disk failure and aeroplane damage.

David Punshon
Delegate of the Civil Aviation Safety Authority

27 February 2007