Federal Register / Vol. 77, No. 54 / Tuesday, March 20, 2012 / Rules and Regulations 16143 

(i) Material Incorporated by Reference 

(1) You must use the following service 

information to do the actions required by this 

AD, unless the AD specifies otherwise. The 

Director of the Federal Register approved the 

incorporation by reference (IBR) of the 

following service information under 5 U.S.C. 

552(a) and 1 CFR part 51 on the date 

specified: 

(i) Pratt & Whitney Alert Service Bulletin 

PW2000 A72–729, Revision 2, dated October 

13, 2010, approved for IBR April 24, 2012. 

(ii) Pratt & Whitney Service Bulletin 

PW2000 A72–513, Revision 4, dated August 

20, 1997, approved for IBR April 24, 2012. 

(iii) LPC First Stage Blade Assembly 

Repair-14, dated February 1, 2006, of the 

Pratt & Whitney PW2037, PW2040, PW2240, 

PW2337 Turbofan Engine Manual (‘‘PW2000 

Series Engine Manual’’), Part No. 1A6231, 

revision 102, dated February 1, 2012, 

approved for IBR April 24, 2012. 

(iv) LPC First Stage Blade Assembly 

Repair-18, dated February 1, 2004, of the 

Pratt & Whitney PW2037, PW2040, PW2240, 

PW2337 Turbofan Engine Manual (‘‘PW2000 

Series Engine Manual’’), Part No. 1A6231, 

revision 102, dated February 1, 2012, 

approved for IBR April 24, 2012. 

(2) For service information identified in 

this AD, contact Pratt & Whitney, 400 Main 

St., East Hartford, CT 06108; phone: (860) 

565–8770; fax: (860) 565–4503. 

(3) You may review copies of the service 

information at the FAA, 12 New England 

Executive Park, Burlington, MA. For 

information on the availability of this 

material at the FAA, call 781–238–7125. 

(4) You may also review copies of the 

service information that is incorporated by 

reference at the National Archives and 

Records Administration (NARA). For 

information on the availability of this 

material at an NARA facility, call 202–741– 

6030, or go to http://www.archives.gov/ 

federal_register/code_of_federal_regulations/ 

ibr_locations.html. 

Issued in Burlington, Massachusetts, on 

January 13, 2012. 

Peter A. White, 

Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

Kalene C. Yanamura, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2012–6500 Filed 3–19–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0566; Directorate 

Identifier 2010–NM–271–AD; Amendment 

39–16975; AD 2012–05–03] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 747–100, 

747–100B, 747–100B SUD, 747–200B, 

747–200C, 747–200F, 747–300, 747– 

400, 747–400D, 747–400F, 747SR, and 

747SP series airplanes. This AD was 

prompted by a design review following 

a ground fire incident and reports of 

flammable fluid leaks from the wing 

leading edge area onto the engine 

exhaust area. This AD requires 

modifying the fluid drain path in the 

leading edge area of the wing. We are 

issuing this AD to prevent flammable 

fluid from leaking onto the engine 

exhaust nozzle, which could result in a 

fire. 

DATES: This AD is effective April 24, 

2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of April 24, 2012. 

ADDRESSES: For service information 

identified in this AD, contact Boeing 

Commercial Airplanes, Attention: Data 

& Services Management, P.O. Box 3707, 

MC 2H–65, Seattle, Washington 98124– 

2207; phone: 206–544–5000, extension 

1; fax: 206–766–5680; email: 

me.boecom@boeing.com; Internet: 

https://www.myboeingfleet.com. You 

may review copies of the referenced 

service information at the FAA, 

Transport Airplane Directorate, 1601 

Lind Avenue SW., Renton, Washington. 

For information on the availability of 

this material at the FAA, call 425–227– 

1221. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Management Facility 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 address for the 

Docket Office (phone: 800–647–5527) is 

Document Management Facility, U.S. 

Department of Transportation, Docket 

Operations, M–30, West Building 

Ground Floor, Room W12–140, 1200 

New Jersey Avenue SE., Washington, 

DC 20590. 

FOR FURTHER INFORMATION CONTACT: 

Tung Tran, Aerospace Engineer, 

Propulsion Branch, ANM–140S, Seattle 

Aircraft Certification Office (ACO), 

FAA, 1601 Lind Avenue SW., Renton, 

Washington 98057–3356; phone: 425– 

917–6505; fax: 425–917–6590; email: 

Tung.Tran@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 published in the Federal 

Register on June 14, 2011 (76 FR 34625). 

That NPRM proposed to require 

modifying the fluid drain path in the 

leading edge area of the wing. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the proposal (76 FR 34625, 

June 14, 2011) and the FAA’s response 

to each comment. 

Request To Withdraw NPRM (76 FR 

34625, June 14, 2011) 

KLM Royal Dutch Airlines (KLM) 

requested we reassess the necessity for 

Boeing Special Attention Service 

Bulletin 747–57–2332, dated November 

9, 2010; the NPRM (76 FR 34625, June 

14, 2011); and the future AD. KLM 

stated the Model 747–400 world fleet (as 

reported by Boeing), as well as the KLM 

fleet, has had no problems with the 

issue described by the NPRM; and 

Model 747–400 airplanes have no slat 

cans or comparable mechanical 

construction and are therefore not 

subject to the unsafe condition. KLM 

also stated that modifying the drain path 

away from the pylon on the outboard 

side of the pylon will not result in an 

improvement, since the wing leading 

edge is installed at an angle, so the fuel 

still can flow towards the engine by 

gravity after it exits the drain hole 

(during ground time). KLM also stated 

that the costs, manpower, and 

additional downtime associated with 

the actions in the NPRM are too high for 

KLM, and it is not convinced the actions 

will contribute to any additional safety. 

We infer the commenter wants the 

NPRM (76 FR 34625, June 14, 2011) 

withdrawn. We disagree. The NPRM 


wreier-aviles on DSK5TPTVN1PROD with RULES
16144 Federal Register / Vol. 77, No. 54 / Tuesday, March 20, 2012 / Rules and Regulations 

addresses drain holes of the wing 

leading edge that are located close to the 

engine nozzle such that a fuel leak from 

any cause, not just from a slat housing 

leak, is drained directly on the engine 

exhaust nozzle, which could cause a 

fuel fire. Therefore, we consider that a 

risk for a fire exists even on the airplane 

models that do not have the slat cans. 

We also disagree with the commenter 

that the modification does not provide 

an improvement to the fuel drainage 

system. The service information 

provides instructions to modify and 

redirect the leading edge drainage away 

from the drain hole that directly 

impinges on the engine exhaust nozzle, 

which reduces the risk of a fire during 

a fuel leak event. We have taken the cost 

of labor and parts into consideration 

and have found that the actions required 

by this final rule are needed to address 

the unsafe condition. We have not 

changed the final rule in this regard. 

Request To Include Service Information 

Revision 

Boeing requested the NPRM (76 FR 

34625, June 14, 2011) include Boeing 

Special Attention Service Bulletin 747– 

57–2332, Revision 1, dated July 25, 

2011, as an option to Boeing Special 

Attention Service Bulletin 747–57– 

2332, dated November 9, 2010 (which 

was referenced in the proposed AD as 

the appropriate source of service 

information for the modification). 

Boeing justified its request by stating 

that Revision 1 of this service 

information adds clarification, but has 

no new requirements. 

We agree. Since the NPRM (76 FR 

34625, June 14, 2011) was issued, 

Boeing has issued Boeing Special 

Attention Service Bulletin 747–57– 

2332, Revision 1, dated July 25, 2011, 

which clarifies certain information and 

provides optional materials. We have 

changed paragraphs (c) and (g) of this 

AD to refer to Boeing Special Attention 

Service Bulletin 747–57–2332, Revision 

1, dated July 25, 2011; added paragraph 

(h) of the AD to give credit for actions 

already accomplished in accordance 

with Boeing Special Attention Service 

Bulletin 747–57–2332, dated November 

9, 2010; and revised subsequent 

paragraph lettering. 

Request To Delegate Approval of 

Structures-Related Alternative Methods 

of Compliance (AMOCs) 

Boeing requested the final rule be 

changed to allow Boeing authority to 

approve AMOCs under Boeing 

Commercial Airplanes Organization 

Designation Authorization (ODA). 

Boeing stated it anticipates repairs will 

be required to panels and ribs, etc., and 

that when the service information is 

embodied, it would be beneficial if the 

Boeing ODA was authorized to approve 

these repairs. 

We agree with the request to delegate 

structural AMOC approval to the Boeing 

ODA because using the Boeing ODA is 

an appropriate process for making those 

findings. Accordingly, we have added 

paragraph (i)(3) to this final rule. 

Additional Change Made to This Final 

Rule 

We have revised the heading and 

marking of paragraph (h) of this AD. 

This change has not changed the intent 

of the paragraph. 

Conclusion 

We reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting the AD 

with the changes described previously 

and minor editorial changes. We have 

determined that these minor changes: 

• Are consistent with the intent that 

was proposed in the NPRM (76 FR 

34625, June 14, 2011) for correcting the 

unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM (76 FR 34625, 

June 14, 2011). 

We also determined that these 

changes will not increase the economic 

burden on any operator or increase the 

scope of the AD. 

Costs of Compliance 

We estimate that this AD affects 258 

airplanes of U.S. registry. 

We estimate the following costs to 

comply with this AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Fluid drainage modification (Groups 1–6) 

(143 airplanes).

95 work-hours × $85 per hour = $8,075 ........ $33,609 $41,684 $5,960,812 

Fluid drainage modification (Groups 7–10) 

(115 airplanes).

90 work-hours × $85 per hour = $7,650 ........ 29,304 36,954 4,249,710 

According to the manufacturer, some 

of the costs of this AD may be covered 

under warranty, thereby reducing the 

cost impact on affected individuals. We 

do not control warranty coverage for 

affected individuals. As a result, we 

have included all costs in our cost 

estimate. 

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 

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 that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Is not a ‘‘significant rule’’ under 

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979), 

(3) Will not affect intrastate aviation 

in Alaska, and 

(4) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 


wreier-aviles on DSK5TPTVN1PROD with RULES
Federal Register / Vol. 77, No. 54 / Tuesday, March 20, 2012 / Rules and Regulations 16145 

under the criteria of the Regulatory 

Flexibility Act. 

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 airworthiness 

directive (AD): 

2012–05–03 The Boeing Company: 

Amendment 39–16975; Docket No. 

FAA–2011–0566; Directorate Identifier 

2010–NM–271–AD. 

(a) Effective Date 

This AD is effective April 24, 2012. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to The Boeing Company 

Model 747–100, 747–100B, 747–100B SUD, 

747–200B, 747–200C, 747–200F, 747–300, 

747–400, 747–400D, 747–400F, 747SR, and 

747SP series airplanes, certificated in any 

category, as identified in Boeing Special 

Attention Service Bulletin 747–57–2332, 

Revision 1, dated July 25, 2011. 

(d) Subject 

Joint Aircraft System Component (JASC)/ 

Air Transport Association (ATA) of America 

Code 57, Wings. 

(e) Unsafe Condition 

This AD was prompted by a design review 

following a ground fire incident and reports 

of flammable fluid leaks from the wing 

leading edge area onto the engine exhaust 

area. We are issuing this AD to prevent 

flammable fluid from leaking onto the engine 

exhaust nozzle, which could result in a fire. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Leading Edge Installation 

Within 60 months after the effective date 

of this AD, modify the fluid drain path in the 

leading edge area of the wing, in accordance 

with the Accomplishment Instructions of 

Boeing Special Attention Service Bulletin 

747–57–2332, Revision 1, dated July 25, 

2011. 

(h) Credit for Previous Actions 

This paragraph provides credit for 

modifications of the fluid drain path required 

by paragraph (g) of this AD, if the 

modification was performed before the 

effective date of this AD, using Boeing 

Special Attention Service Bulletin 747–57– 

2332, dated November 9, 2010. 

(i) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle Aircraft 

Certification Office (ACO), FAA, has the 

authority to approve AMOCs for this AD, if 

requested using the procedures found in 14 

CFR 39.19. In accordance with 14 CFR 39.19, 

send your request to your principal inspector 

or local Flight Standards District Office, as 

appropriate. If sending information directly 

to the manager of the ACO, send it to the 

attention of the person identified in the 

Related Information section of this AD. 

Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/ 

certificate holding district office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for structural 

repairs required by this AD if it is approved 

by the Boeing Commercial Airplanes 

Organization Designation Authorization 

(ODA) that has been authorized by the 

Manager, Seattle ACO to make those 

findings. For a repair method to be approved, 

the repair must meet the certification basis of 

the airplane and the approval must 

specifically refer to this AD. 

(j) Related Information 

For more information about this AD, 

contact Tung Tran, Aerospace Engineer, 

Propulsion Branch, ANM–140S, Seattle 

Aircraft Certification Office (ACO), FAA, 

1601 Lind Avenue SW., Renton, Washington 

98057–3356; phone: 425–917–6505; fax: 425– 

917–6590; email: Tung.Tran@faa.gov. 

(k) Material Incorporated by Reference 

(1) You must use the following service 

information to do the actions required by this 

AD, unless the AD specifies otherwise. The 

Director of the Federal Register approved the 

incorporation by reference (IBR) of the 

following under 5 U.S.C. 552(a) and 1 CFR 

part 51: 

(i) Boeing Special Attention Service 

Bulletin 747–57–2332, Revision 1, dated July 

25, 2011. 

(2) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P.O. Box 3707, MC 2H–65, 

Seattle, Washington 98124–2207; phone: 

206–544–5000, extension 1; fax: 206–766– 

5680; email: me.boecom@boeing.com; 

Internet: https://www.myboeingfleet.com. 

(3) You may review copies of the 

referenced service information at the FAA, 

Transport Airplane Directorate, 1601 Lind 

Avenue SW., Renton, Washington. For 

information on the availability of this 

material at the FAA, call 425–227–1221. 

(4) You may also review copies of the 

service information that is incorporated by 

reference 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/ibr-locations.html. 

Issued in Renton, Washington, on February 

27, 2012. 

Jeffrey E. Duven, 

Acting Manager. Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2012–6116 Filed 3–19–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2012–0190; Directorate 

Identifier 2012–NM–033–AD; Amendment 

39–16979; AD 2012–05–07] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

Bombardier, Inc. Model DHC–8–102, 

–103, and –106 airplanes. This AD 

requires a general visual inspection for 

chamfer of the upper edge of each leaf 

spring, and rework if necessary. This 

AD also requires installing a new 

friction brake nut. This AD was 

prompted by reports that it was possible 

to inadvertently move the power levers 

through the flight idle gate into the beta 

range due to an un-chamfered leaf 

spring in the friction brake that may 

contact the power lever latch when the 

friction adjusting knob is fully loosened. 

We are issuing this AD to detect and 

correct an unsafe condition where both 

engines can inadvertently be operated in 

beta mode during flight and 

consequently reduce controllability of 

the airplane. 

DATES: This AD becomes effective April 

4, 2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in the AD 

as of April 4, 2012. 

We must receive comments on this 

AD by May 4, 2012. 

ADDRESSES: You may send comments by 

any of the following methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 


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