Federal Register / Vol. 76, No. 202 / Wednesday, October 19, 2011 / Proposed Rules 64851 

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– 

1088; Directorate Identifier 2011–NM– 

099–AD. 

Comments Due Date 

(a) We must receive comments by 

December 5, 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; serial 

numbers 4161 through 4296 inclusive. 

Subject 

(d) Air Transport Association (ATA) of 

America Code 53: Fuselage. 

Reason 

(e) The mandatory continuing 

airworthiness information (MCAI) states: 

Several operators have reported difficulties 

in opening the airstair door. Investigation 

revealed that the airstair door gearbox drain 

paths were blocked by sealant, causing water 

to accumulate and freeze in the gearbox 

assembly. An airstair door that is unable to 

be opened could hinder evacuation in the 

event of an emergency. 

* * * * * 

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 

(g) Within 600 flight hours after the 

effective date of this AD, do a general visual 

inspection of the structure and gearbox drain 

paths for blockages by sealant, in accordance 

with the Accomplishment Instructions of 

Bombardier Service Bulletin 84–53–48, dated 

December 2, 2010. If any blockages are found, 

before further flight, remove blockages in 

accordance with the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–53–48, dated December 2, 2010. 

FAA AD Differences 

Note 1: This AD differs from the MCAI 

and/or service information as follows: No 

differences. 

Other FAA AD Provisions 

(h) 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. 

Related Information 

(i) Refer to MCAI Transport Canada Civil 

Aviation (TCCA) Airworthiness Directive 

CF–2011–06, dated April 26, 2011; and 

Bombardier Service Bulletin 84–53–48, dated 

December 2, 2010; for related information. 

Issued in Renton, Washington, on October 

6, 2011. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2011–27023 Filed 10–18–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1069; Directorate 

Identifier 2011–NM–025–AD] 

RIN 2120–AA64 

Airworthiness Directives; Learjet Inc. 

Model 45 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 would require revising the 

maintenance program to include new or 

more restrictive life-limits and 

inspections. This proposed AD was 

prompted by changes to the 

Airworthiness Limitations Section 

(ALS) of the maintenance manual, 

which adds life-limits, revises lifelimits, or adds inspections not 

previously identified. We are proposing 

this AD to limit exposure of flight 

critical components to corrosion, 

cracking, or failure due to life-limits, 

which if not corrected, could result in 

loss of roll control, fatigue cracking, or 

loss of structural components. 

DATES: We must receive comments on 

this proposed AD by December 5, 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: Deliver to Mail 

address above between 9 a.m. and 

5 p.m., Monday through Friday, except 

Federal holidays. 

For service information identified in 

this proposed AD, contact Learjet, Inc., 

One Learjet Way, Wichita, Kansas 

67209–2942; phone 316–946–2000; fax 

316–946–2220; e-mail 

ac.ict@aero.bombardier.com; Internet 


srobinson on DSK4SPTVN1PROD with PROPOSALS
64852 Federal Register / Vol. 76, No. 202 / Wednesday, October 19, 2011 / Proposed Rules 

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 Management Facility 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 Office 

(phone: 800–647–5527) is in the 

ADDRESSES section. Comments will be 

available in the AD docket shortly after 

receipt. 

FOR FURTHER INFORMATION CONTACT: 

William Griffith, Aerospace Engineer, 

Airframe Branch, ACE–118W, FAA, 

Wichita Aircraft Certification Office, 

1801 Airport Road, Room 100, MidContinent Airport, Wichita, Kansas 

67209; phone: 316–946–4116; fax: 316– 

946–4107; e-mail: 

William.E.Griffith@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written 

relevant data, views, or arguments about 

this proposal. Send your comments to 

an address listed under the ADDRESSES

section. Include ‘‘Docket No. FAA– 

2011–1069; Directorate Identifier 2011– 

NM–025–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 because of 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 

We have reviewed the design 

approval holder’s changes to the ALS of 

the maintenance manual, which adds 

life-limits, revises life-limits, or adds 

inspections not previously identified. 

These changes resulted from the design 

holder’s analysis, testing, and in-service 

history of certain components. We are 

proposing this AD to limit exposure of 

flight critical components to corrosion, 

cracking, or failure due to life-limits, 

which if not corrected, could result in 

loss of roll control, fatigue cracking, or 

loss of structural components. The 

corrective action is revising the 

maintenance program. 

Relevant Service Information 

We reviewed Chapter 04, 

Airworthiness Limitations, of the 

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011; and Bombardier 

Learjet 40 Maintenance Manual MM– 

105, Revision 21, dated January 10, 

2011. This service information describes 

component and system checks and 

replacements and includes new or 

revised life-limits and new inspections. 

FAA’s Determination 

We are proposing this AD because we 

evaluated all the relevant information 

and determined the unsafe condition 

described previously is likely to exist or 

develop in other products of the same 

type design. 

Proposed AD Requirements 

This proposed AD would require 

accomplishing the actions specified in 

the service information described 

previously. 

Costs of Compliance 

We estimate that this proposed AD 

affects 336 of U.S. registry. 

We estimate the following costs to 

comply with this proposed AD: 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Change ALS in maintenance manual ............. 1 work-hour × $85 per hour = $85 ................. $0 $85 $28,560 

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 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), 

(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. 

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: 


srobinson on DSK4SPTVN1PROD with PROPOSALS
Federal Register / Vol. 76, No. 202 / Wednesday, October 19, 2011 / Proposed Rules 64853 

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): 

Learjet Inc.: Docket No. FAA–2011–1069; 

Directorate Identifier 2011–NM–025–AD. 

Comments Due Date 

(a) We must receive comments by 

December 5, 2011. 

Affected ADs 

(b) None 

Applicability 

(c) This AD applies to all Learjet Inc. 

Model 45 airplanes, certificated in any 

category. 

Note 1: This AD requires revisions to 

certain operator maintenance documents to 

include new actions (e.g. inspections). 

Compliance with these actions is required by 

14 CFR 91.403(c). For airplanes that have 

been previously modified, altered, or 

repaired in the areas addressed by these 

actions, the operator may not be able to 

accomplish the inspections described in the 

revisions. In this situation, to comply with 14 

CFR 91.403(c), the operator must request 

approval for an alternative method of 

compliance according to paragraph (i) of this 

AD. The request should include a description 

of changes to the required actions that will 

ensure the continued operational safety of 

the airplane. The FAA has provided guidance 

for this determination in Advisory Circular 

(AC) 25.1529–1A. 

Subject 

(d) Joint Aircraft System Component 

(JASC)/Air Transport Association (ATA) of 

America Code 05: Periodic Inspections. 

Unsafe Condition 

(e) This AD was prompted by changes to 

the Airworthiness Limitations Section (ALS) 

of the maintenance manual (MM), which 

adds life-limits, revises life-limits, or adds 

inspections not previously identified. We are 

issuing this AD to limit exposure of flight 

critical components to corrosion, cracking, or 

failure due to life-limits, which if not 

corrected, could result in loss of roll control, 

fatigue cracking, or loss of structural 

components. 

Compliance 

(f) Comply with this AD within the 

compliance times specified, unless already 

done. 

Maintenance Program Revision 

(g) Within 90 days after the effective date 

of this AD, revise the maintenance program 

by incorporating the applicable inspection 

reference number (IRN) tasks identified in 

table 1 of this AD as specified in Chapter 04, 

Airworthiness Limitations, of the Bombardier 

Learjet 45 Maintenance Manual MM–104, 

Revision 53, dated January 10, 2011; or 

Bombardier Learjet 40 Maintenance Manual 

MM–105, Revision 21, dated January 10, 

2011; as applicable. The initial task 

compliance time is within 90 days after the 

effective date of this AD, or the applicable 

initial compliance time specified in Table 1 

of this AD, whichever is later. 

Note 2: IRN # R2710041 shown in table 1 

of this AD is identified as IRN # N2710041 

in prior revisions of Bombardier Learjet 45 

Maintenance Manual MM–104; and 

Bombardier Learjet 40 Maintenance Manual 

MM–105. 

TABLE 1—IRN TASK REVISION

Model— IRN #— Initial compliance time— Chapter 04 of these documents— 

Model 40, 45 ...... R2710041 ............................................... Within 10 years after the date of 

issuance of the original standard airworthiness certificate or the date of 

issuance of the original export certificate of airworthiness, or within 10 

years after the most recent replacement, whichever occurs later.

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011; or Bombardier 

Learjet 40 Maintenance Manual MM– 

105, Revision 21, dated January 10, 

2011; as applicable. 

Model 40, 45 ...... Q5510091 .............................................. Within 600 flight hours after the most 

recent inspection done in accordance 

with IRN # Q5510091.

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011; or Bombardier 

Learjet 40 Maintenance Manual MM– 

105, Revision 21, dated January 10, 

2011; as applicable. 

Model 40, 45 ...... Q5530011 .............................................. Before the accumulation of 9,600 total 

flight hours.

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011; or Bombardier 

Learjet 40 Maintenance Manual MM– 

105, Revision 21, dated January 10, 

2011; as applicable. 

Model 40, 45 ...... P3220007 ............................................... Within 48 months after the most recent 

inspection done in accordance with 

IRN # P3220007.

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011; or Bombardier 

Learjet 40 Maintenance Manual MM– 

105, Revision 21, dated January 10, 

2011; as applicable. 

Model 40, 45 ...... P3220146 ............................................... Before the accumulation of 4,800 total 

landings.

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011; or Bombardier 

Learjet 40 Maintenance Manual MM– 

105, Revision 21, dated January 10, 

2011; as applicable. 

Model 40, 45 ...... N3220012, N3220023, N3220035, 

N3220036, and N3220037.

Before the accumulation of 10,000 total 

landings on the component.

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011; or Bombardier 

Learjet 40 Maintenance Manual MM– 

105, Revision 21, dated January 10, 

2011; as applicable. 


srobinson on DSK4SPTVN1PROD with PROPOSALS
64854 Federal Register / Vol. 76, No. 202 / Wednesday, October 19, 2011 / Proposed Rules 

TABLE 1—IRN TASK REVISION—Continued 

Model— IRN #— Initial compliance time— Chapter 04 of these documents— 

Model 40, 45 ...... N3220103, N3220104, N3220105, and 

N3220106.

Before the accumulation of 17,000 total 

landings on the component.

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011; or Bombardier 

Learjet 40 Maintenance Manual MM– 

105, Revision 21, dated January 10, 

2011; as applicable. 

Model 45 ............ N5710147, N5710171, and N5710173 .. Before the accumulation of 6,500 total 

flight hours.

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011. 

Model 45 ............ N5710175 ............................................... Before the accumulation of 6,900 total 

flight hours.

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011. 

Model 45 ............ N5710177 ............................................... Before the accumulation of 7,000 total 

flight hours.

Bombardier Learjet 45 Maintenance 

Manual MM–104, Revision 53, dated 

January 10, 2011. 

No Alternative Intervals 

(h) After accomplishing the revisions 

required by paragraphs (g) of this AD, no 

alternative IRN task or IRN task interval may 

be used unless the IRN task or IRN task 

interval is approved as an AMOC in 

accordance with the procedures specified in 

paragraph (i)(1) of this AD. 

Alternative Methods of Compliance 

(AMOCs) 

(i)(1) The Manager, Wichita 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. 

(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. 

Related Information 

(j) For more information about this AD, 

contact William Griffith, Aerospace Engineer, 

Airframe Branch, ACE–118W, FAA, Wichita 

Aircraft Certification Office, 1801 Airport 

Road, Room 100, Mid-Continent Airport, 

Wichita, Kansas 67209; phone: 316–946– 

4116; fax: 316–946–4107; e-mail: 

William.E.Griffith@faa.gov. 

(k) For service information identified in 

this AD, contact Learjet, Inc., One Learjet 

Way, Wichita, Kansas 67209–2942; telephone 

316–946–2000; fax 316–946–2220; e-mail 

ac.ict@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. 

Issued in Renton, Washington, on October 

5, 2011. 

Ali Bahrami, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2011–27010 Filed 10–18–11; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1087; Directorate 

Identifier 2011–NM–032–AD] 

RIN 2120–AA64 

Airworthiness Directives; Airbus Model 

A318, A319, A320, and A321 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 that would 

supersede two existing ADs. 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: 

Following in-service experience, analyses 

of the failure to follow procedure or heed 

existing cockpit cues were conducted to 

assess the consequences of mismanagement 

of thrust levers during landing. 

The investigation results identified the 

need for improvements in the identification 

of throttle mis-positioning and so providing 

further opportunity for the flight crew to 

identify an incorrect thrust lever 

configuration and to correct this. * * * In 

addition, the analysis of the thrust lever 

management issue shows two categories of 

scenarios that could lead to thrust asymmetry 

during landing with controllability and 

deceleration consequences [.] 

* * * * * 

These thrust asymmetry conditions, if not 

corrected, could result in loss of control of 

the aeroplane during landing. 

* * * * * 

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 December 5, 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 W12–140, 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 Airbus, 

Airworthiness Office—EAS, 1 Rond 

Point Maurice Bellonte, 31707 Blagnac 

Cedex, France; telephone +33 5 61 93 36 

96; fax +33 5 61 93 44 51; e-mail: 

account.airworth-eas@airbus.com; 

Internet http://www.airbus.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. 


srobinson on DSK4SPTVN1PROD with PROPOSALS