Federal Register / Vol. 79, No. 52 / Tuesday, March 18, 2014 / Rules and Regulations 14997 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2013–0689; Directorate 

Identifier 2012–NM–225–AD; Amendment 

39–17791; AD 2014–05–18] 

RIN 2120–AA64 

Airworthiness Directives; Bombardier, 

Inc. 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for all 

Bombardier, Inc. Model DHC–8–400 

series airplanes. This AD was prompted 

by a report that a batch of main landing 

gear (MLG) door actuators with a certain 

part number having certain serial 

numbers could be assembled with the 

scraper installed backward. This AD 

requires repetitive functional checks of 

the MLG alternate extension system 

(AES) and eventual replacement of 

certain MLG door actuators with 

actuators that have either been reworked 

or do not have certain serial numbers. 

We are issuing this AD to prevent 

incorrectly installed scrapers, which 

could hinder the operation of the MLG 

AES, and result in failure of the MLG 

AES on one side, and consequent unsafe 

asymmetrical landing configuration. 

DATES: This AD becomes effective April 

22, 2014. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of April 22, 2014. 

ADDRESSES: You may examine the AD 

docket on the Internet at http://

www.regulations.gov/

#!docketDetail;D=FAA-2013-0689; 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 service information identified in 

this AD, contact Bombardier, Inc., QSeries 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. You may view 

this referenced service information at 

the FAA, Transport Airplane 

Directorate, 1601 Lind Avenue SW., 

Renton, WA. For information on the 

availability of this material at the FAA, 

call 425 227–1221. 

FOR FURTHER INFORMATION CONTACT: 

Luke Walker, Aerospace Engineer, 

Airframe and Mechanical Systems 

Branch, ANE–171, FAA, New York 

Aircraft Certification Office (ACO), 1600 

Stewart Avenue, Suite 410, Westbury, 

NY 11590; telephone 516–228–7363; fax 

516–794–5531. 

SUPPLEMENTARY INFORMATION: 

Discussion 

We issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to all Bombardier, Inc. Model 

DHC–8–400 series airplanes. The NPRM 

published in the Federal Register on 

August 13, 2013 (78 FR 49240). The 

NPRM was prompted by a report that a 

batch of main landing gear (MLG) door 

actuators with a certain part number 

having certain serial numbers could be 

assembled with the scraper installed 

backward. The NPRM proposed to 

require repetitive functional checks of 

the MLG alternate extension system 

(AES) and eventual replacement of 

certain MLG door actuators with 

actuators that have either been reworked 

or do not have certain serial numbers. 

We are issuing this AD to prevent 

incorrectly installed scrapers, which 

could hinder the operation of the MLG 

AES, and result in failure of the MLG 

AES on one side, and consequent unsafe 

asymmetrical landing configuration. 

Transport Canada Civil Aviation 

(TCCA), which is the aviation authority 

for Canada, has issued Canadian 

Airworthiness Directive CF–2012–28R1, 

dated November 26, 2012 (referred to 

after this as the Mandatory Continuing 

Airworthiness Information, or ‘‘the 

MCAI’’), to correct an unsafe condition 

for the specified products. The MCAI 

states: 

It was discovered that a batch of [main 

landing gear] MLG door actuators, [part 

number] P/N 46830–7, may be assembled 

with the scraper installed backwards. This 

condition, if not corrected, could result in 

increased actuator friction, which could 

hinder operation of the MLG alternate 

extension system (AES). In the case of a 

failure of the primary MLG extension system, 

the failure of the MLG AES on one side will 

lead to an unsafe asymmetrical landing 

configuration. 

This [Canadian] AD mandates the 

repetitive functional check of the AES until 

replacement of the affected MLG door 

actuators. 

You may examine the MCAI in the 

AD docket on the Internet at http://

www.regulations.gov/

#!documentDetail;D=FAA-2013-0689- 

0003. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the proposal (78 FR 49240, 

August 13, 2013) and the FAA’s 

response to each comment. 

Request To Correct Typographical 

Error 

Horizon Air noted that the part 

number of the MLG door actuator was 

incorrect in paragraphs (i) and (k) of the 

NPRM (78 FR 49240, August 13, 2013). 

The correct part number is 46830–7 but 

is specified as 16830–7 in paragraphs (i) 

and (k) of the NPRM. 

We agree there was an error regarding 

the part number of the MLG door 

actuator in paragraphs (i) and (k) of the 

NPRM (78 FR 49240, August 13, 2013) 

and have corrected the part number in 

paragraphs (i) and (k) of this final rule. 

Request To Clarify Which MLG 

Actuators Require a Functional Check 

Horizon Air stated that paragraph (h) 

of the NPRM (78 FR 49240, August 13, 

2013) does not clearly define the 

conditions that require a functional 

check of the MLG AES. Horizon Air 

commented that the wording of 

paragraph (h) of the NPRM implied that 

all MLG door actuators having part 

number (P/N) 46830–7 must have a 

functional check accomplished, in 

accordance with Part A of the 

Accomplishment Instructions of 

Bombardier Service Bulletin 84–32–108, 

Revision A, dated October 1, 2012. 

Horizon Air noted that airplanes having 

MLG actuators that are clearly outside of 

the affected group do not need a MLG 

AES functional check. The commenter 

recommended that the airplanes subject 

to the functional check of paragraph (h) 

of the NPRM be changed to those with 

‘‘. . . any MLG door actuator having P/ 

N 46830–7 and a serial number 

included in paragraph 1.A., ‘Effectivity,’ 

of Bombardier Service Bulletin 84–32– 

108, Revision A, dated October 1, 2012, 

or the P/N is unable to be determined.’’ 

We agree with the commenter and 

have revised paragraph (h) of this final 

rule to clarify that only MLG door 

actuators having P/N 46830–7 and a 

serial number included in paragraph 

1.A. ‘‘Effectivity,’’ of Bombardier 

Service Bulletin 84–32–108, Revision A, 

dated October 1, 2012, or a part number 

that cannot be determined, require a 

functional check. 

Request To Require Only Certain 

Section of the Service Information 

One commenter, Mattson, requested 

that the language in the NPRM (78 FR 

49240, August 13, 2013) be changed 


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14998 Federal Register / Vol. 79, No. 52 / Tuesday, March 18, 2014 / Rules and Regulations 

from mandating that the required 

actions be accomplished in accordance 

with the Accomplishment Instructions 

of Bombardier Service Bulletin 84–32– 

108, Revision A, dated October 1, 2012, 

to specifically stating that the required 

actions be accomplished in accordance 

with Section B, ‘‘Procedures,’’ of the 

Accomplishment Instructions. The 

commenter stated that only the actions 

in Section B of the service information 

address the unsafe condition, and the 

FAA should not dictate the working 

environment for implementing the 

correction to the unsafe condition. The 

commenter asserted that requiring 

operators to follow the procedures in 

Section A, ‘‘Job Setup,’’ and Section C, 

‘‘Closeout,’’ of the Accomplishment 

Instructions of Bombardier Service 

Bulletin 84–32–108, Revision A, dated 

October 1, 2012, forces them to have the 

airplane in a specific condition and 

keep it in that condition while 

performing the corrective action. 

Furthermore, if an operator wanted to 

deviate from an action specified in 

Section A or Section C of the service 

information, it would have to request an 

alternative method of compliance 

(AMOC), which would increase the cost 

of compliance with the proposed AD. 

We agree to clarify the required 

actions. Paragraphs (h) and (i) of the 

NPRM (78 FR 49240, August 13, 2013) 

do not require the actions in paragraphs 

3.A., ‘‘Job Set-Up,’’ and 3.C., ‘‘Close 

Out,’’ of the Accomplishment 

Instructions of Bombardier Service 

Bulletin 84–2–108, Revision A, dated 

October 1, 2012. The actions required by 

paragraphs (h) and (i) of the NPRM must 

be done in accordance with Part A, 

‘‘Inspection,’’ and Part B, ‘‘Actuator 

Replacement,’’ of paragraph 3.B., 

‘‘Procedure,’’ of the Accomplishment 

Instructions of Bombardier Service 

Bulletin 84–2–108, Revision A, dated 

October 1, 2012. For clarity, we have 

revised paragraphs (h) and (i) of this 

final rule to include the reference to 

paragraph 3.B., ‘‘Procedure,’’ of the 

Accomplishment Instructions of the 

service information. 

Conclusion 

We reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting this 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 (78 FR 

49240, August 13, 2013) for correcting 

the unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM (78 FR 49240, 

August 13, 2013). 

Costs of Compliance 

We estimate that this AD affects 2 

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 

Records check, functional check, replacement of actuators .. 17 work-hours × $85 per hour 

= $1,445.

$128 $1,573 $3,146 

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 that 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); 

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. 

Examining the AD Docket 

You may examine the MCAI in the 

AD docket on the Internet at http://

www.regulations.gov/

#!documentDetail;D=FAA-2013-0689- 

0003; 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 street address for 

the Docket Operations office (telephone 

(800) 647–5527) is in the ADDRESSES

section. 

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: 

2014–05–18 Bombardier, Inc.: Amendment 

39–17791. Docket No. FAA–2013–0689; 

Directorate Identifier 2012–NM–225–AD. 

(a) Effective Date 

This airworthiness directive (AD) becomes 

effective April 22, 2014. 

(b) Affected ADs 

None. 


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Federal Register / Vol. 79, No. 52 / Tuesday, March 18, 2014 / Rules and Regulations 14999 

(c) Applicability 

This AD applies to all Bombardier, Inc. 

Model DHC–8–400, –401, and –402 

airplanes, certificated in any category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 32, Landing gear. 

(e) Reason 

This AD was prompted by a report that a 

batch of main landing gear (MLG) door 

actuators with a certain part number having 

certain serial numbers could be assembled 

with the scraper installed backward. We are 

issuing this AD to prevent incorrectly 

installed scrapers, which could hinder the 

operation of the MLG alternate extension 

system (AES), and result in failure of the 

MLG AES on one side, and consequent 

unsafe asymmetrical landing configuration. 

(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) Inspection to Determine Part Number of 

MLG Door Actuators 

Within 50 flight hours after the effective 

date of this AD, inspect the MLG door 

actuators to determine whether part number 

(P/N) 46830–7 is installed. A review of 

airplane maintenance records is acceptable in 

lieu of this inspection if the part number of 

the MLG door actuator can be conclusively 

determined from that review. 

(h) Functional Check of the MLG AES 

If, during the inspection to determine the 

part number of the MLG actuators as required 

by paragraph (g) of this AD, any MLG door 

actuator having P/N 46830–7 and a serial 

number included in paragraph 1.A. 

‘‘Effectivity,’’ of Bombardier Service Bulletin 

84–32–108, Revision A, dated October 1, 

2012, is found; or if the part number is 

unable to be determined: At the applicable 

time specified in paragraph (h)(1) or (h)(2) of 

this AD, do a functional check of the MLG 

AES, in accordance with Part A of paragraph 

3.B. ‘‘Procedure,’’ of the Accomplishment 

Instructions of Bombardier Service Bulletin 

84–32–108, Revision A, dated October 1, 

2012. Repeat the functional check thereafter 

at intervals not to exceed 50 flight cycles 

until the actions required by paragraph (i) of 

this AD are done. If the force applied during 

the functional check exceeds 67 pound-force 

(lbf), before further flight, replace the affected 

actuator, in accordance with Part B of 

paragraph 3.B. ‘‘Procedure,’’ of the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–32–108, Revision A, 

dated October 1, 2012. 

(1) For airplanes with MLG door actuators 

that have accumulated more than 950 total 

flight hours as of the effective date of this 

AD: Within 50 flight hours after the effective 

date of this AD. 

(2) For airplanes with MLG door actuators 

that have accumulated 950 total flight hours 

or less as of the effective date of this AD: 

Within 1,000 flight hours after the effective 

date of this AD. 

(i) Terminating Action for Repetitive 

Functional Checks 

At the earlier of the times specified in 

paragraphs (i)(1) and (i)(2) of this AD: 

Replace all MLG door actuators having P/N 

46830–7 and a serial number included in 

paragraph 1.A. ‘‘Effectivity,’’ of Bombardier 

Service Bulletin 84–32–108, Revision A, 

dated October 1, 2012, with MLG door 

actuators reworked in accordance with Part 

B of paragraph 3.B. ‘‘Procedure,’’ of the 

Accomplishment Instructions of Bombardier 

Service Bulletin 84–32–108, Revision A, 

dated October 1, 2012, or with a MLG door 

actuator having P/N 46830–7 and a serial 

number that is not included in section 1.A. 

‘‘Effectivity,’’ of Bombardier Service Bulletin 

84–32–108, Revision A, dated October 1, 

2012. Installation of a MLG door actuator 

having P/N 46830–7 with ‘‘Mod Status 32– 

106’’ on the identification plate is acceptable 

for compliance with the requirements of this 

paragraph. 

(1) Prior to the accumulation of 3,000 total 

flight hours on any MLG door actuator, or 

within 50 flight hours after the effective date 

of this AD, whichever occurs later. 

(2) Within 12 months or 2,000 flight hours 

after the effective date of this AD, whichever 

occurs first. 

(j) Credit for Previous Actions 

This paragraph provides credit for actions 

required by paragraph (i) of this AD, if those 

actions were performed before the effective 

date of this AD using Bombardier Service 

Bulletin 84–32–108, dated September 6, 

2012, which is not incorporated by reference 

in this AD. 

(k) Parts Installation Limitation 

As of the effective date of this AD, no 

person may install a MLG door actuator 

having P/N 46830–7, with a serial number 

identified in paragraph 1.A. ‘‘Effectivity,’’ of 

Bombardier Service Bulletin 84–32–108, 

Revision A, dated October 1, 2012, unless 

‘‘Mod Status 32–106’’ is on the identification 

plate. 

(l) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York 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, NY 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. 

(m) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) Canadian 

Airworthiness Directive CF–2012–28R1, 

dated November 26, 2012, for related 

information. The MCAI may be found in the 

AD docket on the Internet at http://

www.regulations.gov/

#!documentDetail;D=FAA-2013-0689-0003. 

(2) Service information identified in this 

AD that is not incorporated by reference may 

be obtained at the addresses specified in 

paragraphs (n)(3) and (n)(4) of this AD. 

(n) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

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

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless this AD specifies otherwise. 

(i) Bombardier Service Bulletin 84–32–108, 

Revision A, dated October 1, 2012. 

(ii) Reserved. 

(3) 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. 

(4) You may view this service information 

at the FAA, Transport Airplane Directorate, 

1601 Lind Avenue SW., Renton, WA. For 

information on the availability of this 

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

(5) You may view this 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/ibrlocations.html. 

Issued in Renton, Washington, on February 

19, 2014. 

Jeffrey E. Duven, 

Manager, Transport Airplane Directorate, 

Aircraft Certification Service. 

[FR Doc. 2014–04851 Filed 3–17–14; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 95 

[Docket No. 30949; Amdt. No. 512] 

IFR Altitudes; Miscellaneous 

Amendments 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 


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