6584 Federal Register / Vol. 76, No. 25 / Monday, February 7, 2011 / Proposed Rules 

Washington 98057–3356; telephone (425) 

227–2125; fax (425) 227–1149. Information 

may be e-mailed to: 9-ANM-116-AMOCREQUESTS@faa.gov. 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. 

Related Information 

(j) Refer to MCAI European Aviation Safety 

Agency Airworthiness Directive 2010–0225, 

dated November 5, 2010; and Airbus 

Mandatory Service Bulletin A300–24–6102, 

Revision 01, dated September 24, 2010; for 

related information. 

Issued in Renton, Washington, on January 

31, 2011. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2011–2612 Filed 2–4–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–0036; Directorate 

Identifier 2010–NM–230–AD] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. Model DHC–8–400 Series 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: We propose to adopt a new 

airworthiness directive (AD) for the 

products listed above. This proposed 

AD results from mandatory continuing 

airworthiness information (MCAI) 

originated 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: 

Bombardier Aerospace has completed a 

system safety review of the aeroplanes fuel 

system against fuel tank safety standards 

introduced in Chapter 525 of the 

Airworthiness Manual through Notice of 

Proposed Amendment (NPA) 2002–043 

[which corresponds with the FAA’s Special 

Federal Aviation Regulation (SFAR) 88]. The 

identified non-compliances were then 

assessed using Transport Canada Policy 

Letter No. 525–001, to determine if 

mandatory corrective action is required. 

The assessment showed that a number of 

modifications to the fuel system are required 

to mitigate unsafe conditions that could 

result in potential ignition source within the 

fuel system. 

The proposed AD would require 

actions that are intended to address the 

unsafe condition described in the MCAI. 

DATES: We must receive comments on 

this proposed AD by March 24, 2011. 

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. 

• Fax: (202) 493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue, SE., Washington, DC 20590. 

• Hand Delivery: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–40, 1200 New Jersey 

Avenue, SE., Washington, DC, between 

9 a.m. and 5 p.m., Monday through 

Friday, except Federal holidays. 

For service information identified in 

this proposed 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; e-mail 

thd.qseries@aero.bombardier.com; 

Internet http://www.bombardier.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 Operations office between 9 a.m. 

and 5 p.m., Monday through Friday, 

except Federal holidays. The AD docket 

contains this proposed AD, 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. 

FOR FURTHER INFORMATION CONTACT: 

James Delisio, Aerospace Engineer, 

Propulsion and Services Branch, ANE– 

173, FAA, New York Aircraft 

Certification Office, 1600 Stewart 

Avenue, Suite 410, Westbury, New York 

11590; telephone (516) 228–7321; fax 

(516) 794–5531. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposed AD. Send your comments 

to an address listed under the 

ADDRESSES section. Include ‘‘Docket No. 

FAA–2011–0036; Directorate Identifier 

2010–NM–230–AD’’ at the beginning of 

your comments. We specifically invite 

comments on the overall regulatory, 

economic, environmental, and energy 

aspects of this proposed AD. We will 

consider all comments received by the 

closing date and may amend this 

proposed AD based on those comments. 

We will post all comments we 

receive, without change, to http:// 

www.regulations.gov, including any 

personal information you provide. We 

will also post a report summarizing each 

substantive verbal contact we receive 

about this proposed AD. 

Discussion 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian 

Airworthiness Directive CF–2010–31, 

dated September 3, 2010 (referred to 

after this as ‘‘the MCAI’’), to correct an 

unsafe condition for the specified 

products. The MCAI states: 

Bombardier Aerospace has completed a 

system safety review of the aeroplanes fuel 

system against fuel tank safety standards 

introduced in Chapter 525 of the 

Airworthiness Manual through Notice of 

Proposed Amendment (NPA) 2002–043 

[which corresponds with the FAA’s Special 

Federal Aviation Regulation (SFAR) 88]. The 

identified non-compliances were then 

assessed using Transport Canada Policy 

Letter No. 525–001, to determine if 

mandatory corrective action is required. 

The assessment showed that a number of 

modifications to the fuel system are required 

to mitigate unsafe conditions that could 

result in potential ignition source within the 

fuel system. 

The Bombardier modifications 

include: 

• Modsum 4–126330, ‘‘Fuel Tank 

System Design Left and Right Side 

(SFAR 88) Retrofit.’’ The retrofit 

includes replacing certain fittings, 

couplings, o-rings, gaskets, fuel adapter, 

and other related components with new, 

improved parts; applying alodine 1132 

to certain areas of a wing rib and a wing 

spar; and replacing a certain doubler on 

the front wing spar with a new, 

improved doubler. 

• Modsum 4–126366, ‘‘Fuel Tank 

System and Fuel Indication—Wiring 

Identification, Segregation and 


wwoods2 on DSK1DXX6B1PROD with PROPOSALS_PART 1
Federal Register / Vol. 76, No. 25 / Monday, February 7, 2011 / Proposed Rules 6585 

Installation (High Level Sensor and Fuel 

Quantity Indication)—Retrofit.’’ The 

retrofit includes adding new wiring 

with protective sleeving, reworking 

existing wiring, labeling and separating 

the fuel quantity indicating (FQI) wiring 

and high level sensor wiring from other 

wiring, enhancing the electro-magnetic 

interference (EMI) shielding of the 

wiring connected to the vent valve 

position switch, and installing 

additional provisions (bulkhead 

brackets) for wiring clips in the center 

fuselage. 

• Modsum 4–901425, ‘‘Fuel Feed to 

APU—Replacement of Couplings in 

Center Wing Left Side—SFAR 88.’’ 

• Modsum 4–126370, ‘‘Fuel Tank 

System—Enhance Protective Covering 

for Electrical Cable Assembly,’’ which 

includes reworking the contact area on 

the rib at Yw-42.000 to ensure adequate 

electrical bonding, installing spiral wrap 

on certain cable assemblies where 

existing spiral wrap does not extend 

4 inches past the tie mounts, applying 

a dome seal on thread openings on a 

high level sensor, and installing fuel 

grommets at certain locations. 

• Modsum 4–113580, ‘‘Fuel 

Indication—High Level Sensor— 

Application of Sealant to exposed end 

of Sensor Terminal Block Screws— 

Special Inspection and Rectification,’’ 

which includes doing a detailed 

inspection of the high level sensor for 

correct sealant coverage (‘dome seal’) on 

the terminal screws, and applying 

sealant if necessary. 

You may obtain further information 

by examining the MCAI in the AD 

docket. 

The FAA has examined the 

underlying safety issues involved in fuel 

tank explosions on several large 

transport airplanes, including the 

adequacy of existing regulations, the 

service history of airplanes subject to 

those regulations, and existing 

maintenance practices for fuel tank 

systems. As a result of those findings, 

we issued a regulation titled ‘‘Transport 

Airplane Fuel Tank System Design 

Review, Flammability Reduction and 

Maintenance and Inspection 

Requirements’’ (66 FR 23086, May 7, 

2001). In addition to new airworthiness 

standards for transport airplanes and 

new maintenance requirements, this 

rule included Special Federal Aviation 

Regulation No. 88 (‘‘SFAR 88,’’ 

Amendment 21–78, and subsequent 

Amendments 21–82 and 21–83). 

Among other actions, SFAR 88 

requires certain type design (i.e., type 

certificate (TC) and supplemental type 

certificate (STC)) holders to substantiate 

that their fuel tank systems can prevent 

ignition sources in the fuel tanks. This 

requirement applies to type design 

holders for large turbine-powered 

transport airplanes and for subsequent 

modifications to those airplanes. It 

requires them to perform design reviews 

and to develop design changes and 

maintenance procedures if their designs 

do not meet the new fuel tank safety 

standards. As explained in the preamble 

to the rule, we intended to adopt 

airworthiness directives to mandate any 

changes found necessary to address 

unsafe conditions identified as a result 

of these reviews. 

In evaluating these design reviews, we 

have established four criteria intended 

to define the unsafe conditions 

associated with fuel tank systems that 

require corrective actions. The 

percentage of operating time during 

which fuel tanks are exposed to 

flammable conditions is one of these 

criteria. The other three criteria address 

the failure types under evaluation: 

single failures, single failures in 

combination with a latent condition(s), 

and in-service failure experience. For all 

four criteria, the evaluations included 

consideration of previous actions taken 

that may mitigate the need for further 

action. 

We have determined that the actions 

identified in this AD are necessary to 

reduce the potential of ignition sources 

inside fuel tanks, which, in combination 

with flammable fuel vapors, could result 

in fuel tank explosions and consequent 

loss of the airplane. 

Relevant Service Information 

Bombardier has issued Service 

Bulletins: 

• 84–57–09, Revision B, dated 

September 3, 2008; 

• 84–28–04, Revision B, dated 

October 21, 2009; 

• 84–28–05, dated June 28, 2006; 

• 84–28–03, Revision C, dated May 

15, 2009; and 

• 84–28–07, dated August 1, 2008. 

Bombardier has also issued Fuel 

Systems Limitation (FSL) Task 284000– 

417 in Section 4–1, Fuel System 

Limitations, of Part 2—Airworthiness 

Limitation Items, Revision 5, dated 

April 21, 2010, of Bombardier Q400 

Dash 8 Maintenance Requirements 

Manual, PSM 1–84–7. 

The actions described in this service 

information are intended to correct the 

unsafe condition identified in the 

MCAI. 

FAA’s Determination and Requirements 

of This Proposed AD 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 

in the United States. Pursuant to our 

bilateral agreement with the State of 

Design Authority, we have been notified 

of the unsafe condition described in the 

MCAI and service information 

referenced above. We are proposing this 

AD because we evaluated all pertinent 

information and determined an unsafe 

condition exists and is likely to exist or 

develop on other products of the same 

type design. 

Differences Between This AD and the 

MCAI or Service Information 

We have reviewed the MCAI and 

related service information and, in 

general, agree with their substance. But 

we might have found it necessary to use 

different words from those in the MCAI 

to ensure the AD is clear for U.S. 

operators and is enforceable. In making 

these changes, we do not intend to differ 

substantively from the information 

provided in the MCAI and related 

service information. 

We might also have proposed 

different actions in this AD from those 

in the MCAI in order to follow FAA 

policies. Any such differences are 

highlighted in a Note within the 

proposed AD. 

Costs of Compliance 

Based on the service information, we 

estimate that this proposed AD would 

affect about 67 products of U.S. registry. 

We also estimate that it would take 

about 526 work-hours per product to 

comply with the basic requirements of 

this proposed AD. The average labor 

rate is $85 per work-hour. Required 

parts would cost about $37,696 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 costs. 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 the 

proposed AD on U.S. operators to be 

$5,521,202, or $82,406 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 


wwoods2 on DSK1DXX6B1PROD with PROPOSALS_PART 1
6586 Federal Register / Vol. 76, No. 25 / Monday, February 7, 2011 / Proposed Rules 

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 proposed AD 

would not have federalism implications 

under Executive Order 13132. This 

proposed AD would 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); 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 proposed 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. 

The Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 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: 

Bombardier, Inc.: Docket No. FAA–2011– 

0036; Directorate Identifier 2010–NM– 

230–AD. 

Comments Due Date 

(a) We must receive comments by March 

24, 2011. 

Affected ADs 

(b) None. 

Applicability 

(c) This AD applies to Bombardier, Inc. 

Model DHC–8–400, –401, and –402 

airplanes, certificated in any category; with 

serial numbers (S/N) 4003, 4004, 4006, and 

4008 through 4205 inclusive. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 28: Fuel. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

Bombardier Aerospace has completed a 

system safety review of the aeroplanes fuel 

system against fuel tank safety standards 

introduced in Chapter 525 of the 

Airworthiness Manual through Notice of 

Proposed Amendment (NPA) 2002–043 

[which corresponds with the FAA’s Special 

Federal Aviation Regulation (SFAR) 88]. The 

identified non-compliances were then 

assessed using Transport Canada Policy 

Letter No. 525–001, to determine if 

mandatory corrective action is required. 

The assessment showed that a number of 

modifications to the fuel system are required 

to mitigate unsafe conditions that could 

result in potential ignition source within the 

fuel system. 

Compliance 

(f) You are responsible for having the 

actions required by this AD performed within 

the compliance times specified, unless the 

actions have already been done. 

Actions Applicable to Airplanes Having S/N 

4003, 4004, 4006 & 4008 Through 4118 

(g) For airplanes having S/Ns 4003, 4004, 

4006, and 4008 through 4118 inclusive: 

Within 6,000 flight hours after the effective 

date of this AD, incorporate the 

modifications required in paragraphs (g)(1), 

(g)(2), and (g)(3) of this AD, as applicable. 

(1) Incorporate Bombardier Modsum 4– 

126330, ‘‘Fuel Tank System Design Left and 

Right Side (SFAR 88) Retrofit,’’ by doing all 

the applicable actions in the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–57–09, Revision B, dated 

September 3, 2008. 

(2) Incorporate Bombardier Modsum 4– 

126366, ‘‘Fuel Tank System and Fuel 

Indication—Wiring Identification, 

Segregation and Installation (High Level 

Sensor and Fuel Quantity Indication)— 

Retrofit,’’ by doing all the applicable actions 

in the Accomplishment Instructions of 

Bombardier Service Bulletin 84–28–04, 

Revision B, dated October 21, 2009. 

(3) For airplanes on which Bombardier 

Modsum 4–302000, ‘‘Standard Option—APU 

Installation,’’ has been installed: Incorporate 

Bombardier Modsum 4–901425, ‘‘Fuel Feed 

to APU—Replacement of Couplings in Center 

Wing Left Side—SFAR 88,’’ by doing all the 

applicable actions in the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–28–05, dated June 28, 2006. 

(h) For airplanes having S/Ns 4003, 4004, 

4006, and 4008 through 4118 inclusive, do 

Bombardier Fuel System Limitation (FSL) 

Task 284000–417 (Functional Check of the 

Fuel Tank Components and Plumbing Lines 

for Electrical Bonding) contained in Section 

4–1, Fuel System Limitations, of Part 2— 

Airworthiness Limitation Items, Revision 5, 

dated April 21, 2010, of Bombardier Q400 

Dash 8 Maintenance Requirements Manual, 

PSM 1–84–7, at the applicable times 

specified in paragraphs (h)(1) and (h)(2) of 

this AD. Where the task specifies contacting 

Bombardier for technical assistance, this AD 

requires repairs/rework actions in accordance 

with a method approved by the Manager, 

New York Aircraft Certification Office (ACO), 

FAA, or Transport Canada Civil Aviation 

(TCCA) (or its delegated agent). 

(1) Except as provided in paragraphs 

(h)(1)(i) and (h)(1)(ii) of this AD, for airplanes 

that have incorporated either Bombardier 

Modsum 4–126330 or 4–901425 prior to the 

effective date of this AD: Do Bombardier FSL 

Task 284000–417 within 6,000 flight hours 

after the effective date of this AD. 

(i) Airplanes on which Bombardier FSL 

Task 284000–417 was successfully 

completed after incorporation of Bombardier 

Modsum 4–126330 or 4–901425 do not need 

to comply with the requirements of 

paragraph (h) of this AD. 

(ii) Airplanes on which Bombardier 

Modsum 4–126330 or 4–901425 was 

incorporated during manufacturing of the 

airplane do not need to comply with the 

requirements of paragraph (h) of this AD. 

(2) For airplanes on which neither 

Bombardier Modsum 4–126330 nor 4–901425 

were incorporated before the effective date of 

this AD: Do Bombardier FSL Task 284000– 

417 upon completion of the incorporation of 

Bombardier Modsum 4–126330 and, if 

applicable, Bombardier Modsum 4–901425. 

Actions Applicable to Airplanes S/N 4003, 

4004, 4006 & 4008 Through 4118 Inclusive, 

Manufactured Before September 21, 2005 

(i) For airplanes having S/N 4003, 4004, 

4006, and 4008 through 4118 inclusive, on 

which the date of issuance of the original 

Canadian standard airworthiness certificate 

or the date of issuance of the original 

Canadian export certificate of airworthiness 

is before September 21, 2005: Within 6,000 

flight hours after the effective date of this AD, 

incorporate Bombardier Modsum 4–126370, 

‘‘Fuel Tank System—Enhance Protective 

Covering for Electrical Cable Assembly,’’ by 

doing all the applicable actions in the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–28–03, Revision C, dated 

May 15, 2009. 

Actions Applicable to Airplanes S/N 4003, 

4004, 4006 & 4008 Through 4118 Inclusive, 

Manufactured on or After September 21, 

2005 

(j) For airplanes having S/Ns 4003, 4004, 

4006, and 4008 through 4118 inclusive, on 

which the date of issuance of the original 

Canadian standard airworthiness certificate 

or the date of issuance of the original 

Canadian export certificate of airworthiness 

is on or after September 21, 2005: Within 

12,000 flight hours after the effective date of 

this AD, incorporate Bombardier Modsum 4– 

126370, ‘‘Fuel Tank System—Enhance 

Protective Covering for Electrical Cable 

Assembly,’’ by doing all the applicable 

actions in the Accomplishment Instructions 


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of Bombardier Service Bulletin 84–28–03, 

Revision C, dated May 15, 2009. 

Actions Applicable to Airplanes S/N 4119 

Through 4205 Inclusive 

(k) For airplanes having S/N 4119 through 

4205 inclusive: Within 6,000 flight hours 

after the effective date of this AD, incorporate 

Bombardier Modsum 4–113580, ‘‘Fuel 

Indication—High Level Sensor—Application 

of Sealant to Exposed End of Sensor 

Terminal Block Screws—Special Inspection 

and Rectification,’’ by doing all the applicable 

actions in the Accomplishment Instructions 

of Bombardier Service Bulletin 84–28–07, 

dated August 1, 2008. 

Credit for Actions Accomplished in 

Accordance With Previous Service 

Information 

(l) Incorporation of Bombardier Modsum 

4–126330 prior to the effective date of this 

AD according to the instructions contained in 

Bombardier Service Bulletin 84–57–09, 

Revision A, dated March 19, 2007, meets the 

requirements of paragraph (g)(1) of this AD. 

(m) Incorporation of Bombardier Modsum 

4–126366 prior to the effective date of this 

AD according to the instructions contained in 

Bombardier Service Bulletin 84–28–04, dated 

June 29, 2006; or Revision A, dated 

November 15, 2006; meets the requirements 

of paragraph (g)(2) of this AD. 

(n) Incorporation of Bombardier Modsum 

4–126370 prior to the effective date of this 

AD according to instructions contained in 

Bombardier Service Bulletin 84–28–03, 

Revision B, dated October 18, 2006, meets 

the requirements of paragraphs (i) and (j) of 

this AD. 

FAA AD Differences 

Note 1: This AD differs from the MCAI 

and/or service information as follows: The 

MCAI specifies to do Bombardier FSL Task 

28400–417, but does not specify what to do 

if the functional check finds that measured 

resistance exceeds the specified values. This 

AD requires contacting the Manager, New 

York ACO, FAA, or TCCA (or its delegated 

agent) for repair/rework instructions. 

Other FAA AD Provisions 

(o) The following provisions also apply to 

this AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, ANE–170, New York 

ACO, FAA, has the authority to approve 

AMOCs for this AD, if requested using the 

procedures found in 14 CFR 39.19. Send 

information 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. 

Related Information 

(p) Refer to MCAI Canadian Airworthiness 

Directive CF–2010–31, dated September 3, 

2010; Bombardier Task 284000–417 in 

Section 4–1, Fuel System Limitations, of Part 

2—Airworthiness Limitation Items, Revision 

5, dated April 21, 2010, of Bombardier Q400 

Dash 8 Maintenance Requirements Manual, 

PSM 1–84–7; and the Bombardier service 

bulletins identified in Table 1 of this AD; for 

related information. 

TABLE 1—RELEVANT SERVICE INFORMATION

Bombardier Service Bulletin— Revision— Dated— 

84–28–03 .......................................................................... C ...................................................................................... May 15, 2009. 

84–28–04 .......................................................................... B ...................................................................................... October 21, 2009. 

84–28–05 .......................................................................... Original ............................................................................ June 28, 2006. 

84–28–07 .......................................................................... Original ............................................................................ August 1, 2008. 

84–57–09 .......................................................................... B ...................................................................................... September 3, 2008. 

Dated: Issued in Renton, Washington, on 

January 31, 2011. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2011–2613 Filed 2–4–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF THE INTERIOR 

Office of Surface Mining Reclamation 

and Enforcement 

30 CFR Part 938 

[PA–159–FOR; OSM 2010–0017] 

Pennsylvania Regulatory Program 

AGENCY: Office of Surface Mining 

Reclamation and Enforcement (OSM), 

Interior. 

ACTION: Proposed rule; public comment 

period and opportunity for public 

hearing on removal of required 

amendment. 

SUMMARY: We are announcing receipt of 

a request to remove a required 

amendment to the Pennsylvania 

regulatory program (the ‘‘Pennsylvania 

program’’) under the Surface Mining 

Control and Reclamation Act of 1977 

(SMCRA or the Act). In response to a 

required program amendment codified 

in the Federal regulations, Pennsylvania 

has submitted information that it 

believes demonstrates that sufficient 

funds exist to guarantee coverage of the 

full cost of land reclamation at all sites 

originally permitted and bonded under 

its now-defunct alternative bonding 

system. Pennsylvania requests that the 

program amendment be removed based 

on the information provided. 

This document gives the times and 

locations that the Pennsylvania program 

and this submittal are available for your 

inspection, the comment period during 

which you may submit written 

comments, and the procedures that we 

will follow for the public hearing, if one 

is requested. 

DATES: We will accept written 

comments until 4 p.m., local time 

March 9, 2011. If requested, we will 

hold a public hearing on March 4, 2011. 

We will accept requests to speak until 

4 p.m., local time on February 22, 2011. 

ADDRESSES: You may submit comments, 

identified by ‘‘PA–159–FOR; Docket ID: 

OSM–2010–0017’’ by either of the 

following two methods: 

Federal eRulemaking Portal: http:// 

www.regulations.gov. The proposed rule 

has been assigned Docket ID: OSM– 

2010–0017. If you would like to submit 

comments through the Federal 

eRulemaking Portal, go to http:// 

www.regulations.gov and follow the 

instructions. 

Mail/Hand Delivery/Courier: Mr. 

George Rieger, Chief, Pittsburgh Field 

Division, Office of Surface Mining 

Reclamation and Enforcement, 

Harrisburg Transportation Center, 415 

Market St., Suite 304, Harrisburg, PA 

17101. 

Instructions: For detailed instructions 

on submitting comments and additional 

information on the rulemaking process, 

see the ‘‘Public Comment Procedures’’ 

heading of the SUPPLEMENTARY

INFORMATION section of this document. 

Docket: In addition to obtaining 

copies of documents at http:// 

www.regulations.gov, information may 

also be obtained at the addresses listed 


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