Transport Transports 

Canada Canada

TP 7245E

 

AIRWORTHINESS DIRECTIVE The following airworthiness directive (AD) may be applicable to an aircraft which our records indicate is registered in your name. ADs are i suant to Canadian 

Aviation Regulation (CAR) 593. Pursuant to CAR 605.84 and the further details of CAR Standard 625, Appendix H, the continuing airworthi a Canadian registered aircraft is contingent upon compliance with all applicable ADs. Failure to comply with the requirements of an AD may invalidate the flight authorizati the aircraft. Alternative means of compliance shall be applied for in accordance with CAR 605.84 and the above-referenced Standard. 

This AD has been issued by the Continuing Airworthiness Division (AARDG), Aircraft Certification Branch, Transport Canada, Ottawa, telephone 613 952-4357.

 

ssued pur

ness of

on of

Pursuant to CAR 202.51 the registered owner of a Canadian aircraft shall, within seven days, notify the Minister in writing of any change of his or her name or address. 

To request a change of address, contact the Civil Aviation Communications Centre (AARC) at Place de Ville, Ottawa, Ontario K1A 0N8, or 1-800-305-2059, or www.tc.gc.ca/civilaviation/communications/centre/ address.asp 

24-0022 (01-2005)

1/2 No.

CF-2007-24R1

Issue Date 

21 December 2007 

Number: CF-2007-24R1 

Subject: PW 200 Compressor Turbine Disk Inspection and Retaining Nut Replacement 

Effective: 10 January 2008 

Revision: Supersedes Airworthiness Directive (AD) CF-2007-24 dated 25 October 2007 

Applicability:

PW206A Serial No. PCE-BA0031 and earlier 

PW206B Serial No. PCE-BB00126 and earlier 

PW206B2 Serial No. PCE-BJ0369 and earlier 

PW206C Serial No. PCE-BC0605 and earlier 

PW206E Serial No. PCE-BE0048 and earlier 

PW207C Serial No. PCE-BH0054 and earlier 

PW207D Serial No. PCE-BF0135 and earlier 

PW207E Serial No. PCE-BG0106 and earlier 

PW207K Serial No. PCE-BK0032 and earlier 

Compliance: As indicated below in “Corrective Actions” in the “, unless already accomplished. 

Background: PW206 and PW207 Compressor Turbine (CT) Disk bore areas may experience impact 

damage resulting from bending or fracture of the CT Disk Retaining Nut. Damage of the 

CT disk bore area can reduce LCF capabilities of the CT disk, resulting in disk fracture. 

To preclude any potentially hazardous situation precipitated by a damaged CT disc, 

P&WC issued Alert Service bulletin PW200-72-A28280, requiring inspection of the CT 

disc bore area for damage and replacement of the existing Disk Retaining Nut with an 

improved designed part. 

The most recent compliance data indicates that the majority of the affected engines, 

particularly those with high in-service time, still have not been inspected to service 

bulletin (SB) PW200-72-A28280 requirements and as such, are potentially susceptible to 

CT disc damage. This AD is issued to mandate the inspection of the CT disc bore area 

and replacement of the existing Disk Retaining Nut, in accordance with 

SB PW200-72-A28280 R4 instructions. 
No.

 N° CF-2007-24R1 2/2 

Corrective 

Actions: 

On all affected engines specified in the applicability section of this directive, accomplish 

the following: 

1. For Engines that have never had a shop visit and have accumulated 4000 CT cycles 

or more since new, or 

For Engines that have accumulated 2700 compressor turbine (CT) cycles or more

since: 

a) last shop visit; or

b) last CT disc inspection; or

c) incorporation of SB. PW200-72- 28287. 

Within 1150 hrs of engine operating time since 28 April 2006 (original issue date of 

SB PW200-72-A28280), but not later than March 21, 2008, whichever occurs first,

accomplish the following in accordance with P&WC SB PW200-72-A28280 R4 or later 

revisions approved by the Chief, Continuing Airworthiness, Aircraft Certification, 

Transport Canada: 

A. Inspect the CT disk bore area for damage and if any damage is noticed, replace the 

CT disc before next flight. 

B. Replace the existing CT disc retaining nut and associated hardware. 

2. For engines that have never had a shop visit and have accumulated less than 4000 

CT cycles since new, before the engine reaches 4000 CT cycles or not later than 

March 21, 2008, whichever occurs later, accomplish the corrective actions in 

paragraphs 1.A. and 1.B. above in accordance with P&WC SB PW200-72-A28280 R4 

or later revisions approved by the Chief, Continuing Airworthiness, Aircraft 

Certification, Transport Canada. 

3. For engines that have accumulated less than 2700 CT cycles since: 

a) last shop visit; or 

b) last CT disc inspection; or 

c) incorporation of P&WC SB pw200-72-28287. 

Before the engine reaches 2700 CT cycles or not later than March 21, 2008, whichever

occurs later, accomplish the correction actions in paragraphs 1.A. and 1.B. above in 

accordance with P&WC SB PW200-72-A28280 R4 or later revisions approved by the 

Chief, Continuing Airworthiness, Aircraft Certification, Transport Canada. 

Note: Compliance with earlier versions of SB PW200-72-A28280 requirements prior 

to the effective date of this directive satisfies the corrective action 

requirements of this directive. 

Authorization: For Minister of Transport, Infrastructure and Communities 

Bohdan Goyaniuk 

Chief, Continuing Airworthiness 

Contact: Mr. Robin Lau, Continuing Airworthiness, Ottawa, telephone (613) 952-4461, facsimile 

(613) 996-9178 or e-mail laur@tc.gc.ca or any Transport Canada Centre.