DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[4910-13-P] 

(Docket No. FAA-2012-0942; Directorate Identifier 2012-NE-24-AD; Amendment 

39-17355; AD 2013-03-21] 

RIN 2120-AA64 

Airworthiness Directives; Pratt & Whitney Canada Corp. Turboshaft Engines 

AGENCY: Federal Aviation Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new airworthiness directive (AD) for certain serial 

number Pratt & Whitney Canada Corp. PW206B, PW206B2, PW206C, PW207C, 

PW207D, PW207D 1, PW207D2, and PW207E turboshaft engines. This AD was 

prompted by the discovery that certain power turbine (PT) disks were made to specific 

heat codes that may not achieve the maximum in-service life. This AD requires reidentification of the PT disk to a part number (PIN) with a lower life limit. We are issuing 

this AD to prevent possible uncontained PT disk failure and loss of helicopter control. 

DATES: This AD becomes effective [INSERT DATE 35 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. The Director of the Federal Register 

approved the incorporation by reference of a certain publication listed in this AD as of 

[INSERT DATE 35 DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL 

REGISTER]. 

ADDRESSES: The Docket Operations office is located at Docket Management Facility, 

U.S. Department ofTransportation, 1200 New Jersey Avenue SE., West Building Ground 

Floor, Room W12-140, Washington, DC 20590-0001. 
FOR FURTHER INFORMATION CONTACT: James Lawrence, Aerospace 

Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 01803 ; phone: 781-238-7176; fax: 781-238-

7199; email: james.lawrence(a)faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 to 

include an AD that would apply to the specified products. That NPRM was published in 

the Federal Register on November 7, 2012 (77 FR 66767). That NPRM proposed to 

correct an unsafe condition for the specified products. The Mandatory Continuing 

Airworthiness Information states: 

Comments 

Certain power turbine (PT) disks, part number (PIN) 3044188-01 , 

made to specific heat codes may not achieve the established 

maximum in-service life when installed in Turbomachinery 

Assembly PIN 3058588. The PT disk in-service life for engines 

using this specific PT disk and compressor turbine (CT) vane 

combination is reduced when operated in a particular temperature 

and speed environment. 

We gave the public the opportunity to participate in developing this AD. We 

received no comments on the NPRM (77 FR 66767, November 7, 2012). 

Conclusion 

We reviewed the available data and determined that air safety and the public 

interest require adopting the AD as proposed (77 FR 66767, November 7, 2012). 

Costs of Compliance 

We estimate that this AD will affect about 83 engines installed on helicopters of 

U.S. registry. We also estimate that it will take about 4 hours per engine to comply with 

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this AD. The average labor rate is $85 per hour. Prorated parts life will cost about $8,900. 

Based on these figures, we estimate the cost of this AD on U.S. operators to be $766,920. 

Authority for This Rulemaking 

Title 49 of the United States Code specifies the FAA's authority to issue rules on 

aviation safety. Subtitle I, section 106, describes the authority of the FAA Administrator. 

"Subtitle VII: Aviation Programs," describes in more detail the scope ofthe Agency's 

authority. 

We are issuing this rulemaking under the authority described in "Subtitle VII, 

Part A, Subpart III, Section 44701: General requirements." Under that section, Congress 

charges the FAA with promoting safe flight of civil aircraft in air commerce by 

prescribing regulations for practices, methods, and procedures the Administrator finds 

necessary for safety in air commerce. This regulation is within the scope of that authority 

because it addresses an unsafe condition that is likely to exist or develop on products 

identified in this rulemaking action. 

Regulatory Findings 

We determined that this AD will not have federalism implications under 

Executive Order 13132. This AD will not have a substantial direct effect on the States, on 

the relationship between the national government and the States, or on the distribution of 

power and responsibilities among the various levels of government. 

For the reasons discussed above, I certify this AD: 

1. Is not a "significant regulatory action" under Executive Order 12866; 

2. Is not a "significant rule" under the DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979); and 

3. Will not have a significant economic impact, positive or negative, on a 

substantial number of small entities under the criteria of the Regulatory Flexibility Act. 

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We prepared a regulatory evaluation of the estimated costs to comply with this 

AD and placed it in the AD docket. 

Examining the AD Docket 

You may examine the AD docket on the Internet at http://www.regulations.gov; 

or in person at the Docket Operations office between 9 a.m. and 5 p.m., Monday through 

Friday, except Federal holidays. The AD docket contains this AD, the regulatory 

evaluation, any comments received, and other information. The street address for the 

Docket Operations office (phone: 800-647-5527) is provided in the ADDRESSES 

section. Comments will be available in the AD docket shortly after receipt. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. 

Adoption of the Amendment 

Accordingly, under the authority delegated to me by the Administrator, the FAA 

amends 14 CFR part 39 as follows: 

PART 39 -AIRWORTHINESS DIRECTIVES 

1. The authority citation for patt 39 continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113 , 44701. 

§ 39.13 [Amended] 

2. The FAA amends§ 39.13 by adding the following new AD: 

2013-03-21 Pratt & Whitney Canada Corp.: Amendment 39-17355; Docket No. FAA2012-0942; Directorate Identifier 2012-NE-24-AD. 

(a) Effective Date 

This airworthiness directive (AD) becomes effective [INSERT DATE 35 DAYS 

AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. 

(b) Affected ADs 

None. 

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(c) Applicability 

This AD applies to Pratt & Whitney Canada Corp. (P&WC) model PW206B, 

PW206B2, PW206C, PW207C, PW207D, PW207D 1, PW207D2, and PW207E 

turboshaft engines. 

(d) Reason 

This AD was prompted by the discovery that certain power turbine (PT) disks, 

part number (PIN) 3044188-01 , made to specific heat codes that may not achieve the 

established maximum in-service life when installed in Turbomachinery Assembly PIN 

3058588. The PT disk in-service life for engines using this specific PT disk and 

compressor turbine vane combination is reduced when operated in a particular 

temperature and speed environment. We are issuing this AD to prevent possible 

uncontained PT disk failure and loss of helicopter control. 

(e) Actions and Compliance 

Unless already done, do the following actions. 

(f) Affected PT Disks Installed with Turbomachinery Assembly PIN 3058588 

Installation 

(1) For any PT disk PIN 3044188-01 that is listed by serial number (SIN) in Table 

1 ofP&WC Alert Service Bulletin (ASB) No. PW200-72-A28311, Revision 2, dated July 

24, 2012, and, that is installed or that had previously been installed with Turbomachinery 

Assembly PIN 3058588 installation, do the following: 

(i) Remove the PT disk PIN 3044188-01 from service before it reaches 10,000 

cycles-since-new (CSN). 

(ii) Re-identify the PT disk to PIN 3072542-01, at the next engine shop visit, not 

to exceed 10,000 CSN on the PT disk, before reinstalling it in any engine. Use paragraphs 

3.B.(l) through 3.B.(l)(b)1 of the Accomplishment Instructions ofP&WC ASB No. 

PW200-72-A28311, Revision 2, dated July 24, 2012, to do there-identification. 

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(iii) After re-identification of the PT disk to PIN 3072542-01 , retain the total 

cycles accumulated as PIN 3044188-01. The cycles remaining on the re-identified PIN 

3072542-01 PT disk must be calculated using the difference between the published life 

limit of PIN 3072542-01 and the total number of cycles accumulated as PIN 3044188-01. 

The maximum in-service life ofPT disk, PIN 3072542-01, is 10,000 CSN. 

(2) After the effective date of this AD, do not install any PT disk, PIN 3044188-

01 , that is listed in Table 1 ofP&WC ASB No. PW200-72-A28311 , Revision 2, dated 

July 24, 2012, in any engine with Turbomachinery Assembly PIN 3058588 installation, 

unless the PT disk has been re-identified to PIN 3072542-01. Use paragraphs 3.B.(l) 

through 3.B.(1)(b)1 ofthe Accomplishment Instructions ofP&WC ASB No. PW200-72-

A28311, Revision 2, dated July 24, 2012, to do the PT disk re-identification. 

(g) Credit for Actions Accomplished in Accordance with Previous Service 

Information 

You may take credit for the re-identification of the PT disk that is required by this 

AD if you performed there-identification before the effective date ofthis AD using 

P&WC ASB No. PW200-72-A28311, dated March 1, 2012, or P&WC ASB No. PW200-

72-A28311, Revision 1, dated March 22,2012. 

(h) Alternative Methods of Compliance (AMOCs) 

The Manager, Engine Certification Office, FAA, may approve AMOCs for this 

AD. Use the procedures found in 14 CFR 39.19 to make your request. 

(i) Related Information 

(1) For more information about this AD, contact James Lawrence, Aerospace 

Engineer, Engine Certification Office, FAA, Engine & Propeller Directorate, 12 New 

England Executive Park, Burlington, MA 01803; phone: 781-238-7176; fax: 781-238-

7199; email: james.lawrence@faa.gov. 

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(2) Refer to Transport Canada AD CF-2012-23, dated July 26, 2012, for related 

information. 

(3) The Engine Maintenance Manual (EMM) Temporary Revisions (TRs) listed in 

Table 1 to paragraph (i)(3) ofthis AD pertain to the subject of this AD. 

Table 1 to Paragraph (i)(3)- EMM TRs 

EMMP/Ns: TR Nos.: 

3071602 AL-3 , AL-4 

3043612 AL-12, AL-13 

3043322 AL-16 

3039732 AL-18, AL-19 

3038324 AL-20 

(j) Material Incorporated by Reference 

(1) The Director ofthe Federal Register approved the incorporation by reference 

(IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and I CFR 

part 51. 

(2) You must use this service information as applicable to do the actions required 

by this AD, unless the AD specifies otherwise. 

(i) Pratt & Whitney Canada Corp. Alert Service Bulletin No. PW200-72-A28311 , 

Revision 2, dated July 24, 2012. 

(ii) Reserved. 

(3) For service information identified in this AD, contact Pratt & Whitney Canada 

Corp., 1000 Marie-Victorin, Longueuil, Quebec, Canada, J4G 1A1 ; phone: 800-268-

8000; fax: 450-647-2888; Web site: www.pwc.ca. 

( 4) You may view this service information at the FAA, Engine & Propeller 

Directorate, 12 New England Executive Park, Burlington, MA. For information on the 

availability ofthis material at the FAA, call 781-238-7125. 

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(5) You may view this service information at the National Archives and Records 

Administration (NARA). For information on the availability of this material at NARA, 

call 202-741-6030, or go to: http://www. archives.govl{ederal-register/c{r/ibrlocal ions. html. 

Issued in Burlington, Massachusetts, on February 7, 2013. 

Robert J. Ganley, 

Acting Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

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