Federal Register / Vol. 75, No. 162 / Monday, August 23, 2010 / Rules and Regulations 51657 

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 part 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: 

2010–17–11 Dowty Propellers (formerly 

Dowty Aerospace; Dowty Rotol Limited; 

and Dowty Rotol): Amendment 39– 

16403. Docket No. FAA–2009–0776; 

Directorate Identifier 2009–NE–32–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective September 27, 2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Dowty Propellers 

R408/6–123–F/17 model propellers. These 

propellers are installed on, but not limited to, 

Bombardier, Inc. (formerly de Havilland 

Canada) models DHC–8–400, DHC–8–401, 

and DHC–8–402 series airplanes. 

Reason 

(d) This AD results from mandatory 

continuing airworthiness information (MCAI) 

issued by an aviation authority of another 

country to identify and correct an unsafe 

condition on an aviation product. We are 

issuing this AD to prevent an in-flight double 

generator failure, which could result in 

reduced controllability of the airplane. 

Actions and Compliance 

(e) Unless already done, do the following 

actions. 

(1) For R408/6–123–F/17 model propellers 

with a hub, actuator, and backplate assembly 

line-replaceable unit serial numbers below 

DAP0347, do the following initial sealant 

application within 5,000 flight hours (FH) 

after the effective date of this AD: 

(i) Apply sealant between the bus bar 

assemblies and the backplate assembly. 

(ii) Use paragraph 3 of the 

Accomplishment Instructions of Dowty 

Propellers Alert Service Bulletin No. D8400– 

61–A66, Revision 5, dated June 16, 2010, to 

do the sealant application. 

(2) Thereafter, for all R408/6–123–F/17 

model propellers, re-apply sealant as 

specified in paragraphs (e)(1)(i) through 

(e)(1)(ii) within every additional 10,000 FH. 

Installation Prohibition 

(3) After modification of all propellers on 

an airplane as required by paragraph (e)(1) of 

this AD, do not install any Dowty R408/6– 

123–F/17 propeller on that airplane unless 

sealant has been applied between the bus bar 

assemblies and the backplate assembly of 

that propeller using the requirements of this 

AD. 

FAA AD Differences 

(f) None. 

Previous Credit 

(g) Sealant application performed before 

the effective date of this AD using Dowty 

Propellers Service Bulletin No. D8400–61– 

66, dated February 9, 2007, Revision 1, dated 

May 4, 2007, Alert Service Bulletin No. 

D8400–61–A66, Revision 2, dated August 19, 

2009, Revision 3, dated November 10, 2009, 

Revision 4, dated January 19, 2010, or 

Revision 5, dated June 16, 2010, satisfies the 

initial sealant application requirement of this 

AD. 

Alternative Methods of Compliance 

(AMOCs) 

(h) The Manager, Boston Aircraft 

Certification Office, FAA, has the authority to 

approve AMOCs for this AD, if requested 

using the procedures found in 14 CFR 39.19. 

Related Information 

(i) Refer to EASA AD 2009–0114, dated 

May 28, 2009, for related information. 

(j) Contact Michael Schwetz, Aerospace 

Engineer, Boston Aircraft Certification Office, 

FAA, Engine and Propeller Directorate, 12 

New England Executive Park, Burlington, 

MA 01803; e-mail: michael.schwetz@faa.gov; 

telephone (781) 238–7761; fax (781) 238– 

7170, for more information about this AD. 

Material Incorporated by Reference 

(k) You must use Dowty Propellers Alert 

Service Bulletin No. D8400–61–A66, 

Revision 5, dated June 16, 2010, to do the 

actions required by this AD. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this AD, contact Dowty Propellers, Anson 

Business Park, Cheltenham Road East, 

Gloucester GL 29QN, UK; telephone: 44 (0) 

1452 716000; fax: 44 (0) 1452 716001. 

(3) You may review copies at the FAA, 

New England Region, 12 New England 

Executive Park, Burlington, MA; or 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.gov/federal-register/cfr/ibrlocations.html. 

Issued in Burlington, Massachusetts, on 

August 5, 2010. 

Peter A. White, 

Assistant Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–20707 Filed 8–20–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0245; Directorate 

Identifier 2010–NE–15–AD; Amendment 39– 

16398; AD 2010–17–06] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney Canada Corp. (P&WC) 

PW615F–A Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This AD results 

from mandatory continuing 

airworthiness information (MCAI) 

issued by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: 

A PW617F–E engine powered twin 

engined aircraft had recently experienced an 

uncommanded power reduction on one of its 

engines. Investigation showed that the Fuel 

Filter Bypass Valve poppet in the Fuel Oil 

Heat Exchanger (FOHE) on that engine had 

worn through the housing seat, allowing 

unfiltered fuel and debris to contaminate the 

Fuel Metering Unit (FMU), resulting in fuel 

flow drop and subsequent power reduction. 

P&WC has confirmed that this is a dormant 

failure that could result in an unsafe 

condition. 

The PW615F–A engine Fuel Filter Bypass 

Valve installation is very similar to that of 

PW617F–E, but so far there have been no 

operational abnormalities reported due to 

subject valve failure on PW615F–A engines. 

However, evaluation by P&WC has confirmed 

similar dormant failure of worn through 

poppets of the subject valve on some 

PW615F–A engine installations, which could 

affect both engines at the same time on an 

aircraft and may result in an unsafe 

condition. 

We are issuing this AD to prevent 

uncommanded power reduction, which 

could result in the inability to continue 

safe flight and safe landing. 


sroberts on DSKD5P82C1PROD with RULES
51658 Federal Register / Vol. 75, No. 162 / Monday, August 23, 2010 / Rules and Regulations 

DATES: This AD becomes effective 

September 27, 2010. The Director of the 

Federal Register approved the 

incorporation by reference of certain 

publications listed in this AD as of 

September 27, 2010. 

ADDRESSES: The Docket Operations 

office is located at Docket Management 

Facility, U.S. Department of 

Transportation, 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 

and Propeller Directorate, 12 New 

England Executive Park; Burlington, MA 

01803; e-mail: james.lawrence@faa.gov; 

telephone (781) 238–7176; fax (781) 

238–7199. 

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 May 17, 2010 (75 FR 27489). 

That NPRM proposed to correct an 

unsafe condition for the specified 

products. The MCAI states that: 

A PW617F–E engine powered twin 

engined aircraft had recently experienced an 

uncommanded power reduction on one of its 

engines. Investigation showed that the Fuel 

Filter Bypass Valve poppet in the Fuel Oil 

Heat Exchanger (FOHE) on that engine had 

worn through the housing seat, allowing 

unfiltered fuel and debris to contaminate the 

Fuel Metering Unit (FMU), resulting in fuel 

flow drop and subsequent power reduction. 

P&WC has confirmed that this is a dormant 

failure that could result in an unsafe 

condition. 

The PW615F–A engine Fuel Filter Bypass 

Valve installation is very similar to that of 

PW617F–E, but so far there have been no 

operational abnormalities reported due to 

subject valve failure on PW615F–A engines. 

However, evaluation by P&WC has confirmed 

similar dormant failure of worn through 

poppets of the subject valve on some 

PW615F–A engine installations, which could 

affect both engines at the same time on an 

aircraft and may result in an unsafe 

condition. 

P&WC on 9 December 2009, issued an alert 

Service Bulletin (SB) A63071 that introduced 

a new Fuel Filter Bypass Valve assembly 

with an improved design poppet to help 

alleviate the subject poppet wear problem. 

This airworthiness directive (AD) is issued to 

mandate replacement of FOHE Fuel Filter 

Bypass Valve on all PW615F–A engines as 

per the P&WC SB A63071 instructions. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

received no comments on the NPRM or 

on the determination of the cost to the 

public. 

Conclusion 

We reviewed the available data and 

determined that air safety and the 

public interest require adopting the AD 

as proposed. 

Costs of Compliance 

Based on the service information, we 

estimate that this AD will affect about 

378 engines installed on airplanes of 

U.S. registry. We also estimate that it 

will take about 3.5 work-hours per 

engine to comply with this AD. The 

average labor rate is $85 per work-hour. 

Required parts will cost about $22,582 

per engine. Based on these figures, we 

estimate the cost of the AD on U.S. 

operators to be $8,648,451. 

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 of the 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. 

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 part 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: 

2010–17–06 Pratt & Whitney Canada Corp. 

(formerly Pratt & Whitney Canada, Inc.): 

Amendment 39–16398. Docket No. 

FAA–2010–0245; Directorate Identifier 

2010–NE–15–AD. 

Effective Date 

(a) This airworthiness directive (AD) 

becomes effective September 27, 2010. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Pratt & Whitney 

Canada Corp. PW615F–A turbofan engines 

with fuel/oil heat exchanger (FOHE) part 

number (P/N) 35C3778–01 or P/N 35C3778– 

02 installed. These engines are installed on, 

but not limited to, Cessna 510 (Mustang) 

airplanes. 

Reason 

(d) This AD results from mandatory 

continuing airworthiness information (MCAI) 

issued by an aviation authority of another 

country to identify and correct an unsafe 

condition on an aviation product. The MCAI 

describes the unsafe condition as: 


sroberts on DSKD5P82C1PROD with RULES
Federal Register / Vol. 75, No. 162 / Monday, August 23, 2010 / Rules and Regulations 51659 

A PW617F–E engine powered twin 

engined aircraft had recently experienced an 

uncommanded power reduction on one of its 

engines. Investigation showed that the Fuel 

Filter Bypass Valve poppet in the Fuel Oil 

Heat Exchanger (FOHE) on that engine had 

worn through the housing seat, allowing 

unfiltered fuel and debris to contaminate the 

Fuel Metering Unit (FMU), resulting in fuel 

flow drop and subsequent power reduction. 

P&WC has confirmed that this is a dormant 

failure that could result in an unsafe 

condition. 

The PW615F–A engine Fuel Filter Bypass 

Valve installation is very similar to that of 

PW617F–E, but so far there have been no 

operational abnormalities reported due to 

subject valve failure on PW615F–A engines. 

However, evaluation by P&WC has confirmed 

similar dormant failure of worn through 

poppets of the subject valve on some 

PW615F–A engine installations, which could 

affect both engines at the same time on an 

aircraft and may result in an unsafe 

condition. 

We are issuing this AD to prevent 

uncommanded power reduction, which 

could result in the inability to continue safe 

flight and safe landing. 

Actions and Compliance 

(e) Unless already done, replace the FOHE 

fuel filter bypass poppet valve with a larger 

fuel filter bypass poppet valve within 25 

hours of the effective date of the AD. Use 

paragraph 3.A. of the Accomplishment 

Instructions of Pratt & Whitney Canada Corp. 

Alert Service Bulletin (ASB) No. PW600–72– 

A63071, Revision 1, dated January 7, 2010, 

to do the replacement. 

Previous Credit 

(f) A fuel filter bypass poppet valve 

replacement performed before the effective 

date of this AD using Pratt & Whitney Canada 

Corp. ASB No. PW600–72–A63071, dated 

December 9, 2009, satisfies the replacement 

requirement of this AD. 

Alternative Methods of Compliance 

(AMOCs) 

(g) The Manager, Engine Certification 

Office, FAA, has the authority to approve 

AMOCs for this AD, if requested using the 

procedures found in 14 CFR 39.19. 

Related Information 

(h) Refer to MCAI Transport Canada AD 

CF–2010–03, dated January 20, 2010, for 

related information. Contact Pratt & Whitney 

Canada Corp., 1000 Marie-Victorin, 

Longueuil, Quebec, Canada, J4G 1A1; 

telephone 800–268–8000; fax 450–647–2888; 

Web site: http://www.pwc.ca, for a copy of 

this service information. 

(i) Contact James Lawrence, Aerospace 

Engineer, Engine Certification Office, FAA, 

Engine and Propeller Directorate, 12 New 

England Executive Park; Burlington, MA 

01803; e-mail: james.lawrence@faa.gov; 

telephone (781) 238–7176; fax (781) 238– 

7199, for more information about this AD. 

Material Incorporated by Reference 

(j) You must use Pratt & Whitney Canada 

Corp. ASB No. PW600–72–A63071, Revision 

1, dated January 7, 2010 to do the 

replacement required by this AD. 

(1) The Director of the Federal Register 

approved the incorporation by reference of 

this service information under 5 U.S.C. 

552(a) and 1 CFR part 51. 

(2) For service information identified in 

this AD, contact Pratt & Whitney Canada 

Corp., 1000 Marie-Victorin, Longueuil, 

Quebec, Canada, J4G 1A1; telephone 800– 

268–8000; fax 450–647–2888; Web site: 

http://www.pwc.ca. 

(3) You may review copies at the FAA, 

New England Region, 12 New England 

Executive Park, Burlington, MA; or 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.gov/federal-register/cfr/ibrlocations.html. 

Issued in Burlington, Massachusetts, on 

August 4, 2010. 

Peter A. White, 

Assistant Manager, Engine and Propeller 

Directorate, Aircraft Certification Service. 

[FR Doc. 2010–20712 Filed 8–20–10; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2010–0246; Directorate 

Identifier 2010–NE–16–AD; Amendment 39– 

16391; AD 2010–17–01] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney Canada Corp. PW617F–E 

Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for the 

products listed above. This AD results 

from mandatory continuing 

airworthiness information (MCAI) 

issued by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as: 

A PW617F–E engine powered twin 

engined aircraft had recently experienced an 

uncommanded power reduction on one of its 

engines. Investigation showed that the Fuel 

Filter Bypass Valve poppet in the Fuel Oil 

Heat Exchanger (FOHE) on that engine had 

worn through the housing seat, allowing 

unfiltered fuel and debris to contaminate the 

Fuel Metering Unit (FMU), resulting in fuel 

flow drop and subsequent power reduction. 

Pratt & Whitney Canada Corp. issued an 

Alert Service Bulletin (ASB) No. PW600–72– 

A66019 to inspect and replace any discrepant 

valve with the same type new valve. The 

inspection results confirmed that failure of a 

worn through poppet is dormant and it can 

affect both engines at the same time that 

could result in an unsafe condition on 

PW617F–E powered aircraft. 

We are issuing this AD to prevent 

uncommanded power reduction, which 

could result in the inability to continue 

safe flight and safe landing. 

DATES: This AD becomes effective 

September 27, 2010. The Director of the 

Federal Register approved the 

incorporation by reference of certain 

publications listed in this AD as of 

September 27, 2010. 

ADDRESSES: The Docket Operations 

office is located at Docket Management 

Facility, U.S. Department of 

Transportation, 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 

and Propeller Directorate, 12 New 

England Executive Park; Burlington, MA 

01803; e-mail: james.lawrence@faa.gov; 

telephone (781) 238–7176; fax (781) 

238–7199. 

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 May 17, 2010 (75 FR 27491). 

That NPRM proposed to correct an 

unsafe condition for the specified 

products. The MCAI states that: 

A PW617F–E engine powered twin 

engined aircraft had recently experienced an 

uncommanded power reduction on one of its 

engines. Investigation showed that the Fuel 

Filter Bypass Valve poppet in the FOHE on 

that engine had worn through the housing 

seat, allowing unfiltered fuel and debris to 

contaminate the FMU, resulting in fuel flow 

drop and subsequent power reduction. 

Pratt & Whitney Canada Corp. issued an 

ASB No. PW600–72–A66019 to inspect and 

replace any discrepant valve with the same 

type new valve. The inspection results 

confirmed that failure of a worn through 

poppet is dormant and it can affect both 

engines at the same time that could result in 

an unsafe condition on PW617F–E powered 

aircraft. 

On November 23, 2009, Pratt & Whitney 

Canada Corp. issued an ASB No. PW600–72– 

A66021 that introduced a new fuel Filter 

Bypass Valve Assembly with an improved 

design poppet to help alleviate the subject 

poppet wear problem. This AD is issued to 

mandate replacement of the FOHE fuel filter 

bypass valve on all PW617F–E engines as per 

Pratt & Whitney Canada Corp. ASB No. 

PW600–72–A66021 instructions. 


sroberts on DSKD5P82C1PROD with RULES