Federal Register / Vol. 77, No. 57 / Friday, March 23, 2012 / Rules and Regulations 16919 

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. 

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): 

2012–06–17 Rolls-Royce Deutschland Ltd & 

Co KG (Formerly Rolls-Royce plc, 

Derby, England): Amendment 39–16998; 

Docket No. FAA–2012–0288; Directorate 

Identifier 2012–NE–10–AD. 

(a) Effective Date 

This AD becomes effective March 23, 2012. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to the following RollsRoyce Deutschland Ltd & Co KG (RRD) 

turbofan engines: 

(1) TAY 611–8 engines, serial numbers 

(S/Ns) 16870, 16879, 16880, 16897, 18046, 

18051, 18052, 18053, 18058, 18065, 18066, 

18169, and 18194. 

(2) TAY 611–8C engine S/N 85313. 

(d) Reason 

This AD was prompted by the discovery 

that certain high-pressure (HP) turbine 

spanner retaining nuts were improperly heat 

treated after application of silver plating. We 

are issuing this AD to prevent failure of the 

HP turbine stage 2 disc, uncontained engine 

failure, and damage to the airplane. 

(e) Actions and Compliance 

Unless already done, do the following 

actions. 

(1) Within 20 flight cycles after the 

effective date of the AD or within 200 flight 

cycles since the last engine shop visit, 

whichever occurs first, remove the HP 

turbine spanner retaining nut from the 

combustion and HP turbine module, and 

install a new HP turbine spanner retaining 

nut. 

(2) Do not reinstall HP turbine spanner 

retaining nuts removed as specified in 

paragraph (e)(1) of this AD, into any engine. 

(f) Alternative Methods of Compliance 

(AMOCs) 

The Manager, Engine Certification Office, 

may approve AMOCs for this AD. Use the 

procedures found in 14 CFR 39.19 to make 

your request. 

(g) Related Information 

(1) For more information about this AD, 

contact Mark Riley, Aerospace Engineer, 

Engine Certification Office, FAA, Engine & 

Propeller Directorate, 12 New England 

Executive Park, Burlington, MA 01803; 

email: mark.riley@faa.gov; phone: 781–238– 

7758; fax: 781–238–7199. 

(2) Refer to MCAI European Aviation 

Safety Agency Emergency AD 2012–0039–E, 

dated March 9, 2012; AD 2012–0039R1, 

dated March 14, 2012; and RRD Alert Service 

Bulletin No. TAY–72–A1769, dated March 9, 

2012, for related information. 

(3) For service information identified in 

this AD, contact Rolls-Royce Deutschland Ltd 

& Co KG, Eschenweg 11, Dahlewitz, 15827 

Blankenfelde-Mahlow, Germany; phone: 49 0 

33–7086–1883; fax: 49 0 33–7086–3276. You 

may review copies of the referenced service 

information at the FAA, Engine & Propeller 

Directorate, 12 New England Executive Park, 

Burlington, MA. For information on the 

availability of this material at the FAA, call 

781–238–7125. 

Issued in Burlington, Massachusetts, on 

March 19, 2012. 

Peter A. White, 

Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

[FR Doc. 2012–6995 Filed 3–22–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1090; Directorate 

Identifier 2011–NM–138–AD; Amendment 

39–16986; AD 2012–06–05] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

Bombardier, Inc. Model DHC–8–400 

series airplanes. This AD was prompted 

by a report of the inability to open the 

airstair door while on the ground, 

because the airstair door seal did not 

deflate, which prevented the airstair 

door from opening. This AD requires 

changing the wiring that controls the 

pneumatic shut-off valve. We are 

issuing this AD to prevent the airstair 

door seal from not deflating, which 

could result in the airstair door not 

opening and could impede evacuation 

in the event of an emergency. 

DATES: This AD becomes effective April 

27, 2012. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of April 27, 2012. 

ADDRESSES: You may examine the AD 

docket on the Internet at http:// 

www.regulations.gov or in person at the 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue SE., 

Washington, DC. 

FOR FURTHER INFORMATION CONTACT: 

Cesar Gomez, Aerospace Engineer, 

Airframe and Mechanical Systems 

Branch, ANE–171, FAA, New York 

Aircraft Certification Office, 1600 

Stewart Avenue, Suite 410, Westbury, 

New York 11590; telephone (516) 228– 

7318; fax (516) 794–5531. 

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 October 19, 2011 (76 FR 

64847). That NPRM proposed to correct 

an unsafe condition for the specified 

products. The MCAI states: 


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16920 Federal Register / Vol. 77, No. 57 / Friday, March 23, 2012 / Rules and Regulations 

One case of the inability to open the 

airstair door while on ground was reported 

in service. The airstair door seal did not 

deflate, preventing the airstair door from 

opening. It was found that the existing 

airstair door pneumatic shut-off valve control 

logic prevents the airstair door seal from 

deflating due to a single Input/Output 

Module failure under certain conditions. The 

inability to open the airstair door could 

impede evacuation in the event of an 

emergency. 

This [Canadian] directive mandates the 

wiring changes [ModSum 4–126513, Seal 

System Shut Off Valve Control Logic Change] 

to prevent the above-mentioned failure 

conditions. 

You may obtain further information by 

examining the MCAI in the AD docket. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. We 

have considered the comment received. 

Support for the Intent of the NPRM (76 

FR 64847, October 19, 2011) 

Air Line Pilots Association, 

International (ALPA), supports the 

intent of the NPRM (76 FR 64847, 

October 19, 2011). 

Recommendation To Reduce 

Compliance Time 

ALPA recommends that the 

compliance time proposed in the NPRM 

(76 FR 64847, October 19, 2011) be 

reduced to not exceed 3,000 flight hours 

or 12 months, whichever occurs first, 

instead of within 6,000 flight hours as 

specified in the NPRM. 

We disagree with the commenter’s 

recommendation to reduce the 

compliance time. We have determined 

that within 6,000 flight hours represents 

an appropriate interval of time in which 

the required actions can be performed. 

Transport Canada Civil Aviation 

(TCCA), in issuing their Canadian 

Airworthiness Directive CF–2011–15, 

dated June 20, 2011, has assessed the 

risk involved with that action, and 

through that assessment derived the 

compliance time, with which the 

manufacturer, Bombardier, Inc., has 

concurred. The AD does allow operators 

to comply earlier than the 6,000 flight 

hours. However, if additional data are 

presented that would justify a shorter 

compliance time, we might consider 

further rulemaking. We have not 

changed the AD in this regard. 

Explanation of Change Made to This 

AD 

We have revised the wording of 

paragraph (h) of this AD; this change 

does not change the intent of that 

paragraph. 

Conclusion 

We reviewed the available data, 

including the comment received, and 

determined that air safety and the 

public interest require adopting the AD 

with the change 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 

64847, October 19, 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 64847, 

October 19, 2011). 

Costs of Compliance 

We estimate that this AD will affect 

about 81 products of U.S. registry. We 

also estimate that it will take about 12 

work-hours per product to comply with 

the basic requirements of this AD. The 

average labor rate is $85 per work-hour. 

Required parts will cost about $0 per 

product. Where the service information 

lists required parts costs that are 

covered under warranty, we have 

assumed that there will be no charge for 

these parts. As we do not control 

warranty coverage for affected parties, 

some parties may incur costs higher 

than estimated here. Based on these 

figures, we estimate the cost of this AD 

to the U.S. operators to be $82,620, or 

$1,020 per product. 

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 proposed regulation: 

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); 

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 

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 the NPRM (76 FR 64847, 

October 19, 2011), the regulatory 

evaluation, any comments received, and 

other information. The street address for 

the Docket Operations office (telephone 

(800) 647–5527) is 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: 

2012–06–05 Bombardier, Inc.: Amendment 

39–16986. Docket No. FAA–2011–1090; 

Directorate Identifier 2011–NM–138–AD. 

(a) Effective Date 

This airworthiness directive (AD) becomes 

effective April 27, 2012. 

(b) Affected ADs 

None. 


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Federal Register / Vol. 77, No. 57 / Friday, March 23, 2012 / Rules and Regulations 16921 

(c) Applicability 

This AD applies to Bombardier, Inc. Model 

DHC–8–400, –401, and –402 airplanes, 

certificated in any category, serial numbers 

4001 through 4361 inclusive. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 52: Doors. 

(e) Reason 

This AD was prompted by a report of the 

inability to open the airstair door while on 

the ground, because the airstair door seal did 

not deflate, which prevented the airstair door 

from opening. We are issuing this AD to 

prevent the airstair door seal from not 

deflating, which could result in the airstair 

door not opening and could impede 

evacuation in the event of an emergency. 

(f) Compliance 

You are responsible for having the actions 

required by this AD performed within the 

compliance times specified, unless the 

actions have already been done. 

(g) Actions 

Within 6,000 flight hours after the effective 

date of this AD: Incorporate ModSum 4– 

126513, Seal System Shut Off Valve Control 

Logic Change, in accordance with the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–52–69, Revision C, dated 

June 28, 2011. 

(h) Credit for Previous Actions 

This paragraph provides credit for the 

actions required by paragraph (g) of this AD, 

if the actions were performed before the 

effective date of this AD using Bombardier 

Service Bulletin 84–52–69, dated January 28, 

2011; Revision A, dated April 26, 2011; or 

Revision B, dated May 9, 2011. 

(i) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York Aircraft 

Certification Office (ACO), ANE–170, 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 ACO, send it to Attn: Program 

Manager, Continuing Operational Safety, 

FAA, New York ACO, 1600 Stewart Avenue, 

Suite 410, Westbury, New York 11590; 

telephone 516–228–7300; fax 516–794–5531. 

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. The AMOC 

approval letter must specifically reference 

this AD. 

(2) Airworthy Product: For any requirement 

in this AD to obtain corrective actions from 

a manufacturer or other source, use these 

actions if they are FAA-approved. Corrective 

actions are considered FAA-approved if they 

are approved by the State of Design Authority 

(or their delegated agent). You are required 

to assure the product is airworthy before it 

is returned to service. 

(j) Related Information 

Refer to MCAI Canadian Airworthiness 

Directive CF–2011–15, dated June 20, 2011; 

and Bombardier Service Bulletin 84–52–69, 

Revision C, dated June 28, 2011; for related 

information. 

(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 service information under 5 U.S.C. 

552(a) and 1 CFR part 51: 

(i) Bombardier Service Bulletin 84–52–69, 

Revision C, dated June 28, 2011. 

(2) For service information identified in 

this AD, contact Bombardier, Inc., Q-Series 

Technical Help Desk, 123 Garratt Boulevard, 

Toronto, Ontario M3K 1Y5, Canada; 

telephone 416–375–4000; fax 416–375–4539; 

email thd.qseries@aero.bombardier.com; 

Internet http://www.bombardier.com. 

(3) You may review copies of the 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 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 Renton, Washington, on March 9, 

2012. 

Ali Bahrami 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2012–6530 Filed 3–22–12; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1194; Directorate 

Identifier 2011–NE–36–AD; Amendment 39– 

16999; AD 2012–06–18] 

RIN 2120–AA64 

Airworthiness Directives; Pratt & 

Whitney Division Turbofan Engines 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for all Pratt 

& Whitney PW4050, PW4052, PW4056, 

PW4060, PW4060A, PW4060C, 

PW4062, PW4062A, PW4152, PW4156, 

PW4156A, PW4158, PW4160, PW4460, 

PW4462, and PW4650 turbofan engines, 

including models with any dash number 

suffix. This AD was prompted by 

reports of five engine in-flight 

shutdowns and seven unplanned engine 

removals. This AD requires inspections, 

cleaning, and engine modifications to 

address coking in the No. 4 bearing 

compartment and in the oil pressure 

and scavenge tubes. We are issuing this 

AD to prevent an engine fire, a fractured 

fan drive shaft, and damage to the 

airplane. 

DATES: This AD is effective April 27, 

2012. 

ADDRESSES: 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. You may review copies 

of the referenced service information at 

the FAA, Engine & Propeller Directorate, 

12 New England Executive Park, 

Burlington, MA. For information on the 

availability of this material at the FAA, 

call 781–238–7125. 

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: 

James Gray, Aerospace Engineer, Engine 

& Propeller Directorate, FAA, 12 New 

England Executive Park, Burlington, MA 

01803; phone: 781–238–7742; fax: 781– 

238–7199; email: james.e.gray@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 November 23, 2011 (76 FR 

72353). That NPRM proposed to require 

inspections, cleaning, and engine 

modifications to address coking in the 

No. 4 bearing compartment and oil 

pressure and scavenge tubes. 


srobinson on DSK4SPTVN1PROD with RULES