Federal Register / Vol. 80, No. 228 / Friday, November 27, 2015 / Rules and Regulations 73949 

Section 226.3—Exempt Transactions 

* * * * * 

3(b) Credit over applicable threshold 

amount. 

1. * * * 

vii. From January 1, 2016 through 

December 31, 2016, the threshold 

amount is $54,600. 

* * * * * 

BUREAU OF CONSUMER FINANCIAL 

PROTECTION 

Authority and Issuance 

For the reasons set forth in the 

preamble, the Bureau amends 

Regulation Z, 12 CFR part 1026, as set 

forth below: 

PART 1026—TRUTH IN LENDING 

(REGULATION Z) 

■ 3. The authority citation for part 1026 

continues to read as follows: 

Authority: 12 U.S.C. 2601, 2603–2605, 

2607, 2609, 2617, 3353, 5511, 5512, 5532, 

5581; 15 U.S.C. 1601 et seq. 

■ 4. In Supplement I to part 1026, under 

Section 1026.3—Exempt Transactions, 

under 3(b) Credit Over Applicable 

Threshold Amount, paragraph 1.vii is 

added to read as follows: 

Supplement I to Part 1026—Official 

Interpretations 

* * * * * 

Subpart A—General 

* * * * * 

Section 1026.3—Exempt Transactions 

* * * * * 

3(b) Credit Over Applicable Threshold 

Amount 

1. * * * 

vii. From January 1, 2016 through 

December 31, 2016, the threshold 

amount is $54,600. 

* * * * * 

By order of the Board of Governors of the 

Federal Reserve System, November 18, 2015. 

Robert deV. Frierson, 

Secretary of the Board. 

Dated: September 22, 2015. 

Richard Cordray, 

Director, Bureau of Consumer Financial 

Protection. 

[FR Doc. 2015–30091 Filed 11–25–15; 8:45 am] 

BILLING CODE: 6210–01–P; 4810–AM–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2014–0346; Directorate 

Identifier 2014–NM–010–AD; Amendment 

39–18324; AD 2015–23–08] 

RIN 2120–AA64 

Airworthiness Directives; The Boeing 

Company Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

The Boeing Company Model 737–100,– 

200,–200C,–300,–400, and –500 series 

airplanes. This AD was prompted by 

reports of cracks in fuselage frames, and 

a report of a missing strap that was not 

installed on a fuselage frame during 

production. This AD requires an 

inspection to determine if the strap 

adjacent to a certain stringer is installed, 

and repair if it is missing; repetitive 

inspections of the frame for cracking or 

a severed frame web; and related 

investigative and corrective actions if 

necessary. This AD also provides 

optional actions to terminate certain 

repetitive inspections. We are issuing 

this AD to detect and correct missing 

fuselage frame straps and frame cracking 

that can result in severed frames which, 

with multiple adjacent severed frames, 

or the combination of a severed frame 

and fuselage skin chemical mill cracks, 

can result in uncontrolled 

decompression of the airplane. 

DATES: This AD is effective January 4, 

2016. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of January 4, 2016. 

ADDRESSES: For service information 

identified in this AD, contact Boeing 

Commercial Airplanes, Attention: Data 

& Services Management, P.O. Box 3707, 

MC 2H–65, Seattle, WA 98124–2207; 

telephone 206–544–5000, extension 1; 

fax 206–766–5680; Internet https://

www.myboeingfleet.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. It is also available 

on the Internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2014– 

0346.’’ 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2014– 

0346; 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 

Docket 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: 

Galib Abumeri, Aerospace Engineer, 

Airframe Branch, ANM–120L, FAA, Los 

Angeles Aircraft Certification Office, 

3960 Paramount Boulevard, Lakewood, 

CA 90712–4137; phone: 562–627–5324; 

fax: 562–627–5210; email: 

galib.abumeri@faa.gov. 

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 certain The Boeing Company 

Model 737–100,–200,–200C–300,–400, 

and–500 series airplanes. The NPRM 

published in the Federal Register on 

June 30, 2014 (79 FR 36672). The NPRM 

was prompted by reports of cracks in 

fuselage frames, and a report of a 

missing strap that was not installed on 

a fuselage frame during production. The 

NPRM proposed to require an 

inspection to determine if the strap 

adjacent to a certain stringer is installed, 

and repair if it is missing; repetitive 

inspections of the frame for cracking or 

a severed frame web; and related 

investigative and corrective actions if 

necessary. The NPRM also provided 

optional actions to terminate certain 

repetitive inspections. We are issuing 

this AD to detect and correct missing 

fuselage frame straps and frame cracking 

that can result in severed frames. 

Continued operation of the airplane 

with multiple adjacent severed frames, 

or the combination of a severed frame 

and fuselage skin chemical mill cracks, 

can result in uncontrolled 

decompression of the airplane. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comments 

received on the NPRM (79 FR 36672, 

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73950 Federal Register / Vol. 80, No. 228 / Friday, November 27, 2015 / Rules and Regulations 

June 30, 2014) and the FAA’s response 

to each comment. 

Effect of Winglets on AD 

Aviation Partners Boeing stated that 

installation of winglets per 

Supplemental Type Certificate (STC) 

ST01219SE (http://rgl.faa.gov/

Regulatory_and_Guidance_Library/

rgstc.nsf/0/

ebd1cec7b301293e86257cb30045557a/

$FILE/ST01219SE.pdf) does not affect 

the actions specified in the NPRM (79 

FR 36672, June 30, 2014. 

We concur with the commenter. We 

have redesignated paragraph (c) of the 

proposed AD (79 FR 36672, June 30, 

2014) as paragraph (c)(1) of this AD, and 

have added a new paragraph (c)(2) to 

this AD to state that installation of STC 

ST01219SE (http://rgl.faa.gov/

Regulatory_and_Guidance_Library/

rgstc.nsf/0/

ebd1cec7b301293e86257cb30045557a/

$FILE/ST01219SE.pdf) does not affect 

the ability to accomplish the actions 

required by this AD. Therefore, for 

airplanes on which STC ST01219SE is 

installed, a ‘‘change in product’’ 

alternative method of compliance 

(AMOC) approval request is not 

necessary to comply with the 

requirements of 14 CFR 39.17. 

Request To Revise Preamble Wording 

Boeing noted that the SUMMARY of 

the NPRM (79 FR 36672, June 30, 2014) 

explained that some optional actions 

would terminate ‘‘certain’’ repetitive 

inspections. Boeing requested that we 

use this same wording in the Proposed 

AD Requirements section of the NPRM 

(which omitted the word ‘‘certain’’). 

Although we agree with the 

commenter’s statement, the Proposed 

AD Requirements section is not 

repeated in a final rule. Since the 

referenced omission does not affect the 

required actions or the unsafe condition, 

no changes to this final rule are needed. 

Request To Specify Inspection Method 

Boeing requested that we add an 

inspection in paragraph (g) of the 

proposed AD (79 FR 36672, June 30, 

2014). Boeing stated that this is 

consistent with the compliance 

information described in Boeing Alert 

Service Bulletin 737–53A1323, dated 

December 6, 2013. 

We agree with the commenter’s 

request. We inadvertently omitted the 

inspection requirement in paragraph (g) 

of the proposed AD (79 FR 36672, June 

30, 2014), which is described in Boeing 

Alert Service Bulletin 737–53A1323, 

dated December 6, 2013. We have 

revised paragraph (g) of this AD to 

require that the inspection and 

applicable repair be done by using a 

method approved in accordance with 

the procedures specified in paragraph 

(q) of this AD. Paragraph (g) of this AD 

applies only to airplanes identified as 

Group 1 in Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013. 

Currently, there are no Group 1 

airplanes in service in the United States, 

so notice of this new requirement is not 

necessary. 

Request To Revise Terminating Action 

Wording 

Boeing requested that we revise the 

wording in paragraphs (i) and (j) of the 

proposed AD (79 FR 36672, June 30, 

2014) to state the following actions. 

• Doing the repair or preventive 

modification of the frame at station 328 

terminates the applicable repetitive 

inspection requirements. 

• Doing the preventive modification 

of the frame at station 360 terminates 

the applicable station 360 inspection 

requirements. 

• Doing the repair or preventive 

modification of the frame at station 328, 

and doing the preventive modification 

of the frame at station 360 terminates 

the applicable repetitive inspection 

requirements of the frame at station 344, 

and the Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, 

skin inspections. 

Boeing stated that the proposed 

wording in paragraphs (i) and (j) of the 

proposed AD (79 FR 36672, June 30, 

2014) is not clear. Boeing stated that 

inspections of the frame at station 328 

or at station 360 can be terminated by 

a single action (applicable repair or 

modification). Boeing explained that 

accomplishing both specified actions at 

station 328 and station 360 terminates 

the station 344 frame inspections and 

the option 2 skin inspections. 

We agree to clarify the acceptable 

terminating actions. We have added 

new paragraph (m) of this AD, which 

provides the following terminating 

actions. We have redesignated 

subsequent paragraphs accordingly. 

• Accomplishing the repair or 

preventive modification of the frame at 

station 328 terminates the inspections of 

that frame required by paragraphs (i), (j), 

and (k) of this AD. 

• Accomplishing the repair or 

preventive modification of the frame at 

station 328 and the preventive 

modification of the frame at station 360, 

terminates the inspections of the frame 

at station 344 and the fuselage skin 

inspections required by paragraphs (i) 

and (j) of this AD. 

• Accomplishing the repair or 

preventive modification of the frame at 

station 360 terminates the inspections of 

that frame required by paragraphs (i) 

and (j) of this AD. 

• Accomplishing the repair or 

preventive modification of the frame at 

station 328 terminates the fuselage skin 

inspections and the station 328 frame 

inspections required by paragraphs (i) 

and (j) of this AD. 

Recommendation To Specify Optional 

Preventive Modification 

Boeing recommended that we specify 

in paragraphs (i) and (j) of the proposed 

AD (79 FR 36672, June 30, 2014) that 

the station 328 repair described in 

Boeing Alert Service Bulletin 737– 

53A1323, dated December 6, 2013, can 

be used as an optional preventive 

modification. 

We partially agree with the 

commenter’s request. The commenter’s 

request is already addressed in the 

Accomplishment Instructions of Boeing 

Alert Service Bulletin 737–53A1323, 

dated December 6, 2013. However, 

additional text might help clarify this 

provision. We have added additional 

text to paragraphs (i), (j), and (k) of this 

AD that operators may do the repair of 

the frame at station 328, as specified in 

paragraph (m) of this AD, as an optional 

preventive modification for that frame. 

Requests To Revise Paragraph Format 

and Inspection Method 

Boeing requested that we revise 

paragraphs (i) and (j) of the proposed 

AD (79 FR 36672, June 30, 2014) by 

moving the requirements for Group 6 

airplanes to a new paragraph. Boeing 

stated that the service information for 

Group 6 airplanes provides directed 

inspection instructions for the station 

328 frame only, as provided in table 5 

of paragraph 1.E., ‘‘Compliance,’’ of 

Boeing Alert Service Bulletin 737– 

53A1323, dated December 6, 2013. 

Boeing added that for Group 6 airplanes, 

there are no directed inspections for 

station 344 or station 360, but there are 

related investigative and corrective 

actions for detailed inspections of the 

frame at station 312 and station 344. 

Southwest Airlines (SWA) requested 

that we specify that the frame at station 

344 requires detailed inspections, not 

detailed and eddy current inspections. 

SWA stated that Boeing Alert Service 

Bulletin 737–53A1323, dated December 

6, 2013, describes only detailed 

inspections at station 344. 

We partially agree with both 

commenters. We disagree with making 

the changes requested by the 

commenters. However, we agree that 

certain actions are only done at certain 

locations and for certain airplanes. The 

inspections at station 344 are detailed 

inspections only. Application of the 

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Federal Register / Vol. 80, No. 228 / Friday, November 27, 2015 / Rules and Regulations 73951 

appropriate inspection method to a 

given frame is addressed by the phrase 

‘‘as applicable,’’ i.e., actions are 

applicable to the frames identified in 

the service information for each group 

of airplane. We have revised paragraphs 

(i)(1), (i)(2)(i), (i)(2)(ii), (j)(l), and (j)(2) of 

this AD by adding ‘‘as applicable’’ after 

the station locations. This revision 

clarifies that those actions are done only 

as specified in the service information. 

Request To Add Sub-Paragraph 

Headers 

Boeing requested that we add the 

subtitles ‘‘Initial Inspections’’ and 

‘‘Follow-on Inspections’’ to paragraphs 

(i)(1) and (i)(2), respectively, of the 

proposed AD (79 FR 36672, June 30, 

2014). Boeing also requested that we 

change the wording in paragraph (i)(2) 

the proposed AD to ‘‘Accomplishing the 

follow-on inspections required by 

paragraph (i)(2) of this AD,’’ instead of 

‘‘Accomplishing the initial inspections 

. . . ’’ Boeing stated that paragraph (i) 

of the proposed AD would mandate the 

inspections for airplanes with fewer 

than 28,300 total flight cycles, where 

compliance (tables 4, 7, and 8 of 

paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Alert Service Bulletin 737–53A1323, 

dated December 6, 2013) consists of 

initial inspections and then follow-on 

inspections that contain options. Boeing 

explained that paragraph (i)(1) of the 

proposed AD would mandate the initial 

inspections, and paragraph (i)(2) of the 

proposed AD would mandate the 

follow-on inspections. Boeing also 

explained that paragraph (i)(2) of the 

proposed AD phrase ‘‘accomplishing the 

initial inspections’’ is understood to 

refer to the first follow-on inspection 

directed by the compliance time 

(threshold). 

We do not agree with the commenter’s 

request. Paragraph (i)(2) of this AD 

follows the format of Boeing’s service 

bulletin compliance tables, which has a 

different repeat interval from the 

inspections specified in paragraph (i)(1) 

of this AD. Paragraphs (i)(1) and (i)(2) of 

this AD contain both initial and 

repetitive inspections as well as related 

investigative actions. We have not 

changed this AD in this regard. 

Request To Revise Repetitive Inspection 

Wording 

Boeing requested that we revise the 

last sentence of paragraph (i)(2)(ii) of the 

proposed AD (79 FR 36672, June 30, 

2014) to state, ‘‘Repeat the inspections 

specified in this paragraph thereafter 

. . . ’’ Boeing stated that this wording 

would then match the wording for the 

repetitive inspections specified in 

paragraph (i)(2)(i) of the proposed AD. 

We agree with the commenter’s 

request. In this case, similar wording 

will provide consistent paragraph 

wording without changing the intent of 

the NPRM (79 FR 36672, June 30, 2014). 

We have revised the wording in 

paragraph (i)(2)(ii) of this AD to ‘‘Repeat 

the inspections specified in this 

paragraph thereafter at the applicable 

time and intervals specified in... .’’ 

Request To Clarify a Certain 

Compliance Time 

Europe Airpost requested that, in 

order to avoid any confusion, we clearly 

state a compliance time for paragraph (j) 

of the proposed AD (79 FR 36672, June 

30, 2014) for airplanes that have 28,300 

total flight cycles or more. The 

commenter asked whether those 

airplanes would fall under the condition 

28,300 total flight cycles but less than 

32,800 total flight cycles, or 32,800 total 

flight cycles or more. 

We agree that clarification is 

necessary. In this case, paragraph (j) of 

this AD states to use the applicable 

times specified in tables 4, 5, 7, and 8, 

of paragraph 1.E., ‘‘Compliance,’’ of 

Boeing Alert Service Bulletin 737– 

53A1323, dated December 6, 2013. 

Individual airplanes within an 

operator’s fleet could fall into different 

categories and thus have different 

compliance times. Operators are to use 

the appropriate compliance times and 

repetitive intervals based upon the 

applicable number of total flight cycles 

that have been accumulated on each 

airplane as of the effective date of this 

AD. We have added new paragraph 

(n)(3) of the AD to inform operators that 

the ‘‘Condition’’ columns of the 

compliance tables also contain 

compliance information that 

corresponds to the effective date of the 

AD. We have also revised paragraphs 

(i)(1) and (j)(1) of this AD to refer to 

paragraph (n)(3) of this AD. 

Request To Clarify Terminating Action 

Wording 

SWA requested that we revise the 

terminating action portion of paragraph 

(j) of the proposed AD (79 FR 36672, 

June 30, 2014) to clarify the specified 

actions. SWA stated that, as written, the 

terminating action statement seems to 

imply that the operator is required to 

accomplish both the preventive 

modification of the frame at station 360 

and the repair of the frame at station 328 

to terminate the repetitive inspection 

requirements for any of the station 328, 

344, and 360 frames. SWA also stated 

that the terminating action in paragraph 

(j) of the proposed AD does not specify 

actions or terminating actions if a repair 

is installed at the station 344 frame. 

SWA explained that Boeing Alert 

Service Bulletin 737–53A1323, dated 

December 6, 2013, contains terminating 

action in the footnotes of the 

compliance tables in paragraph 1.E., 

‘‘Compliance,’’ which the commenter 

thinks should be restated in the AD. 

We agree with the commenter’s 

request. For clarity, we have moved the 

terminating action provisions that were 

specified in paragraphs (i)(1), (i)(2), (j), 

and (k) of the proposed AD (79 FR 

36672, June 30, 2014) to new paragraphs 

(m)(1) through (m)(4) of this AD. We 

have redesignated subsequent 

paragraphs accordingly. 

Requests To Specify Eddy Current 

Inspection 

Europe Airpost requested that we 

clarify whether we meant to exclude the 

eddy current inspection at station 328 

described in Boeing Alert Service 

Bulletin 737–53A1323, dated December 

6, 2013, in paragraph (k) of the proposed 

AD (79 FR 36672, June 30, 2014). Boeing 

requested that we add the eddy current 

inspection at station 328 described in 

Boeing Alert Service Bulletin 737– 

53A1323, dated December 6, 2013, in 

paragraph (k) of the proposed AD. 

We agree with Boeing’s request to 

specify the eddy current inspection and 

Europe Airpost’s request to clarify the 

eddy current inspection requirement. 

We inadvertently omitted the eddy 

current inspection from paragraph (k) of 

the proposed AD (79 FR 36672, June 30, 

2014) which applies to Group 7 

airplanes. Our intention was to match 

the actions described in Boeing Alert 

Service Bulletin 737–53A1323, dated 

December 6, 2013. In the NPRM (79 FR 

36672, June 30, 2014), we did not 

identify any differences with Boeing 

Alert Service Bulletin 737–53A1323, 

dated December 6, 2013, in regards to 

the required inspections, which 

includes repetitive eddy current 

inspections at station 328. For Groups 2 

through 7 airplanes, paragraphs (i) and 

(j) of the proposed AD do specify 

detailed and HFEC inspections for 

Groups 2 through 6 airplanes. Therefore, 

we have revised paragraph (k) of this 

AD to specify doing eddy current 

inspections, in addition to the detailed 

inspections, of the frame at station 328 

for Group 7 airplanes. 

Request To Specify Terminating 

Actions for Station 380 

SWA requested that we specify 

procedures or terminating actions for 

repairs installed at the station 380 

frame, since paragraph (l) of the 

proposed AD (79 FR 36672, June 30, 

2014) does not specify such actions. 

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73952 Federal Register / Vol. 80, No. 228 / Friday, November 27, 2015 / Rules and Regulations 

We do not agree with the commenter’s 

request. Boeing has not provided such 

repairs for our approval in Boeing Alert 

Service Bulletin 737–53A1323, dated 

December 6, 2013. Therefore, we have 

no specific engineering data to review 

and approve. We have not changed this 

AD in this regard. 

Request for Credit for Certain Repairs 

SWA requested that we revise 

paragraphs (i) through (l) of the 

proposed AD (79 FR 36672, June 30, 

2014) to include provisions for existing 

repairs that were done using the service 

repair manual (SRM) or the original 

equipment manufacturer (OEM) 

instructions. SWA requested that the 

NPRM be revised to either terminate the 

inspections or include alternative 

actions if existing repairs inhibit the 

ability to perform the inspections. 

We partially agree with the 

commenter’s request. We agree that 

repairs approved by Boeing via FAA 

Form 8100–9 (Statement of Compliance 

with Airworthiness Standards) would 

have also included the appropriate 

inspections. We disagree that SRM 

repairs would necessarily provide the 

same level of safety. The commenter did 

not specify for which SRM repairs it 

was requesting approval. Such repairs 

might or might not have included 

consideration of the safety issues 

addressed by Boeing Alert Service 

Bulletin 737–53A1323, dated December 

6, 2013, and this AD (e.g., skin cracking 

combined with frame cracking). We 

have added a new paragraph (p) to this 

AD to provide credit for repairs of the 

station 328, 344, 360, and 380 frames in 

the areas addressed by this AD that have 

been approved by the Boeing ODA via 

FAA Form 8100–9 prior to the effective 

date of this AD for the repairs specified 

in paragraphs (i), (j), (k), and (l) of this 

AD. We have redesignated subsequent 

paragraphs accordingly. 

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 (79 FR 

36672, June 30, 2014) for correcting the 

unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM (79 FR 36672, 

June 30, 2014). 

We also determined that these 

changes will not increase the economic 

burden on any operator or increase the 

scope of this AD. 

Related Service Information Under 1 

CFR Part 51 

We reviewed Boeing Alert Service 

Bulletin 737–53A1323, dated December 

6, 2013. The service information 

describes procedures for inspection for 

cracking and missing straps, 

modification, and repair of certain 

fuselage frames. This service 

information is reasonably available 

because the interested parties have 

access to it through their normal course 

of business or by the means identified 

in the ADDRESSES section of this AD. 

Costs of Compliance 

We estimate that this AD affects 417 

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 

Inspections .................... 21 work-hours × $85 per hour = $1,785 per inspection cycle.$0 $1,785 per inspection 

cycle.

$744,345 per inspection 

cycle. 

We have received no definitive data 

that would enable us to provide cost 

estimates for certain on-condition 

actions specified in this AD. However, 

we estimate the following costs to do 

any necessary repairs of the station 328 

frame and the station 360 frame. We 

have no way of determining the number 

of aircraft that might need these repairs: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Frame 328 repair ............................... 25 work-hours × $85 per hour = $2,125 ...................................................... Negligible ... $2,125 

Frame 360 repair ............................... 5 work-hours × $85 per hour = $425 ........................................................... Negligible ... 425 

Authority for This Rulemaking 

Title 49 of the United States Code 

specifies the FAA’s authority to issue 

rules on aviation safety. Subtitle I, 

section 106, describes the authority of 

the FAA Administrator. Subtitle VII: 

Aviation Programs, describes in more 

detail the scope of the Agency’s 

authority. 

We are issuing this rulemaking under 

the authority described in Subtitle VII, 

Part A, Subpart III, Section 44701: 

‘‘General requirements.’’ Under that 

section, Congress charges the FAA with 

promoting safe flight of civil aircraft in 

air commerce by prescribing regulations 

for practices, methods, and procedures 

the Administrator finds necessary for 

safety in air commerce. This regulation 

is within the scope of that authority 

because it addresses an unsafe condition 

that is likely to exist or develop on 

products identified in this rulemaking 

action. 

Regulatory Findings 

This AD will not have federalism 

implications under Executive Order 

13132. This AD will not have a 

substantial direct effect on the States, on 

the relationship between the national 

government and the States, or on the 

distribution of power and 

responsibilities among the various 

levels of government. 

For the reasons discussed above, I 

certify that this AD: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

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

DOT Regulatory Policies and Procedures 

(44 FR 11034, February 26, 1979), 

(3) Will not affect intrastate aviation 

in Alaska, and 

(4) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

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Federal Register / Vol. 80, No. 228 / Friday, November 27, 2015 / Rules and Regulations 73953 

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): 

2015–23–08 The Boeing Company: 

Amendment 39–18324; Docket No. 

FAA–2014–0436; Directorate Identifier 

2014–NM–010–AD. 

(a) Effective Date 

This AD is effective January 4, 2016. 

(b) Affected ADs 

None. 

(c) Applicability 

(1) This AD applies to The Boeing 

Company Model 737–100, –200, –200C, 

–300, –400, and –500 series airplanes, 

certificated in any category, as identified in 

Boeing Alert Service Bulletin 737–53A1323, 

dated December 6, 2013. 

(2) Installation of Supplemental Type 

Certificate (STC) ST01219SE (http://

rgl.faa.gov/Regulatory_and_Guidance_

Library/rgstc.nsf/0/

ebd1cec7b301293e86257cb30045557a/$FILE/

ST01219SE.pdf) does not affect the ability to 

accomplish the actions required by this AD. 

Therefore, for airplanes on which STC 

ST01920SE is installed, a ‘‘change in 

product’’ alternative method of compliance 

(AMOC) approval request is not necessary to 

comply with the requirements of 14 CFR 

39.17. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 53, Fuselage. 

(e) Unsafe Condition 

This AD was prompted by reports of cracks 

in fuselage frames, and a report of a missing 

strap that was not installed on a fuselage 

frame during production. We are issuing this 

AD to detect and correct missing fuselage 

frame straps and frame cracking that can 

result in severed frames. Continued operation 

of the airplane with multiple adjacent 

severed frames, or the combination of a 

severed frame and fuselage skin chemical 

mill cracks, can result in uncontrolled 

decompression of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Actions for Group 1 Airplanes 

For airplanes identified as Group 1 in 

Boeing Alert Service Bulletin 737–53A1323, 

dated December 6, 2013: At the applicable 

time specified in table 1 of paragraph 1.E., 

‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 737–53A1323, dated December 6, 

2013, except as provided by paragraph (n)(1) 

of this AD, do the inspection for cracking of 

the frames and applicable repairs using a 

method approved in accordance with the 

procedures specified in paragraph (q) of this 

AD. 

(h) Groups 2 Through 7 Airplanes: 

Inspection for Strap Installation at Station 

312 

For airplanes identified as Groups 2 

through 7 in Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013: At 

the applicable time specified in tables 2 and 

3 of paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Alert Service Bulletin 737–53A1323, dated 

December 6, 2013, except as provided by 

paragraph (n)(1) of this AD, do a general 

visual inspection of the frame at station 312 

to determine if the strap adjacent to stringer 

S–22 right is installed, in accordance with 

the Accomplishment Instructions of Boeing 

Alert Service Bulletin 737–53A1323, dated 

December 6, 2013. If the strap is not 

installed, before further flight, repair using a 

method approved in accordance with the 

procedures specified in paragraph (q) of this 

AD. 

(i) Groups 2 Through 6 Airplanes With Less 

Than 28,300 Total Flight Cycles: Repetitive 

Inspections, Related Investigative Actions, 

and Corrective Actions at Stations 328, 344, 

and 360 

For airplanes identified as Groups 2 

through 6 in Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, that 

have accumulated less than 28,300 total 

flight cycles as of the effective date of this 

AD: Do the actions required by paragraphs 

(i)(1) and (i)(2) of this AD. Operators may do 

the repair of the frame at station 328 as 

specified in paragraph (m) of this AD as an 

optional preventive modification for that 

frame. 

(1) At the applicable times specified in 

tables 4, 5, 7, and 8 of paragraph 1.E., 

‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 737–53A1323, dated December 6, 

2013, except as provided by paragraphs (n)(1) 

and (n)(3) of this AD: Do detailed and eddy 

current inspections of the frame at stations 

328, 344, and 360, as applicable, for cracking 

or a severed frame web; and do all applicable 

related investigative and corrective actions; 

in accordance with the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, 

except as specified in paragraph (n)(2) of this 

AD. Do all applicable related investigative 

and corrective actions before further flight. 

Repeat the applicable inspections thereafter 

at the applicable time and intervals specified 

in paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Alert Service Bulletin 737–53A1323, dated 

December 6, 2013, until the inspection 

required by paragraph (i)(2) of this AD is 

done. 

(2) At the applicable time specified in 

tables 4, 5, 7, and 8 of paragraph 1.E., 

‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 737–53A1323, dated December 6, 

2013, do the actions specified in paragraph 

(i)(2)(i) or (i)(2)(ii) of this AD. Accomplishing 

the initial inspections required by paragraph 

(i)(2) of this AD terminates the inspections 

required by paragraph (i)(1) of this AD. 

(i) Do detailed and eddy current 

inspections of the frame at stations 328, 344, 

and 360, as applicable, for cracking or a 

severed frame web; and do all applicable 

related investigative and corrective actions; 

in accordance with the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, 

except as specified in paragraph (n)(2) of this 

AD. Do all applicable related investigative 

and corrective actions before further flight. 

Repeat the inspections specified in this 

paragraph thereafter at the applicable time 

and intervals specified in paragraph 1.E., 

‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 737–53A1323, dated December 6, 

2013. 

(ii) Do detailed and eddy current 

inspections of the frame at stations 328, 344, 

and 360, as applicable, for cracking or a 

severed frame web; and external detailed and 

eddy current inspections of the fuselage skin 

for cracking; and do all applicable related 

investigative and corrective actions; in 

accordance with the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, 

except as specified in paragraph (n)(2) of this 

AD. Do all applicable related investigative 

and corrective actions before further flight. 

Repeat the inspections specified in this 

paragraph thereafter at the applicable time 

and intervals specified in paragraph 1.E., 

‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 737–53A1323, dated December 6, 

2013. 

(j) Groups 2 Through 6 Airplanes With 

28,300 Total Flight Cycles or More: 

Repetitive Inspections, Related Investigative 

Actions, and Corrective Actions at Stations 

328, 344, and 360 

For airplanes identified as Groups 2 

through 6 in Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, that 

have accumulated 28,300 total flight cycles 

or more as of the effective date of this AD: 

At the applicable times specified in tables 4, 

5, 7, and 8 of paragraph 1.E., ‘‘Compliance,’’ 

of Boeing Alert Service Bulletin 737– 

53A1323, dated December 6, 2013, except as 

provided by paragraphs (n)(1) and (n)(3) of 

this AD, do the inspections specified in 

paragraph (j)(1) or (j)(2) of this AD; and do 

all applicable related investigative and 

corrective actions; in accordance with the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 737–53A1323, dated 

December 6, 2013, except as specified in 

paragraph (n)(2) of this AD. Do all applicable 

related investigative and corrective actions 

before further flight. Repeat the applicable 

inspections specified in paragraph (j)(1) or 

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73954 Federal Register / Vol. 80, No. 228 / Friday, November 27, 2015 / Rules and Regulations 

(j)(2) of this AD thereafter at the applicable 

time and intervals specified in paragraph 

1.E., ‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 737–53A1323, dated December 6, 

2013. Operators may do the repair of the 

frame at station 328, as specified in 

paragraph (m) of this AD, as an optional 

preventive modification for that frame. 

(1) Do detailed and eddy current 

inspections of the frame at stations 328, 344, 

and 360, as applicable, for cracking or a 

severed frame web. 

(2) Do detailed and eddy current 

inspections of the frame at stations 328, 344, 

and 360, as applicable, for cracking or a 

severed frame web; and external detailed and 

eddy current inspections of the fuselage skin 

for cracking. 

(k) Group 7 Airplanes: Repetitive 

Inspections, Related Investigative Actions, 

and Corrective Actions at Station 328 

For airplanes identified as Group 7 in 

Boeing Alert Service Bulletin 737–53A1323, 

dated December 6, 2013: At the applicable 

time specified in table 6 of paragraph 1.E., 

‘‘Compliance,’’ of Boeing Alert Service 

Bulletin 737–53A1323, dated December 6, 

2013, except as provided by paragraph (n)(1) 

of this AD, do a detailed inspection and eddy 

current inspection of the frame at station 328 

for cracking or a severed frame web; and do 

all applicable related investigative and 

corrective actions; in accordance with the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 737–53A1323, dated 

December 6, 2013, except as specified in 

paragraph (n)(2) of this AD. Do all applicable 

related investigative and corrective actions 

before further flight. Repeat the inspections 

specified in this paragraph thereafter at the 

applicable time and intervals specified in 

paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Alert Service Bulletin 737–53A1323, dated 

December 6, 2013. Operators may do the 

repair of the frame at station 328, as specified 

in paragraph (m) of this AD, as an optional 

preventive modification for that frame. 

(l) Groups 2 Through 5 Airplanes: Repetitive 

Inspections, Related Investigative Actions, 

and Corrective Actions at Station 380 

For airplanes identified as Groups 2 

through 5 in Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013: At 

the applicable time specified in tables 9 and 

10 of paragraph 1.E., ‘‘Compliance,’’ of 

Boeing Alert Service Bulletin 737–53A1323, 

dated December 6, 2013, except as provided 

by paragraph (n)(1) of this AD, do detailed 

and eddy current inspections of the frame at 

station 380 for cracking or a severed frame 

web; and do all applicable corrective actions; 

in accordance with the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, 

except as specified in paragraph (n)(2) of this 

AD. Do all applicable corrective actions 

before further flight. Repeat the inspections 

specified in this paragraph thereafter at the 

applicable time and intervals specified in 

paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Alert Service Bulletin 737–53A1323, dated 

December 6, 2013. 

(m) Terminating Actions for Airplanes 

Identified as Groups 2, 3, 4, 5, 6, and 7 

(1) For airplanes identified as Groups 2, 3, 

4, 5, and 7 in Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013: 

Accomplishing the repair or preventive 

modification of the frame at station 328, in 

accordance with the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, 

except as required by paragraph (n)(2) of this 

AD, terminates the inspections of that frame 

required by paragraphs (i), (j), and (k) of this 

AD. 

(2) For airplanes identified as Groups 2, 3, 

4, and 5 in Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013: 

Accomplishing the repair or preventive 

modification of the frame at station 328 and 

the preventive modification of the frame at 

station 360, in accordance with the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 737–53A1323, dated 

December 6, 2013, except as required by 

paragraph (n)(2) of this AD, terminates the 

inspections of the frame at station 344 and 

the fuselage skin inspections required by 

paragraphs (i) and (j) of this AD. 

(3) For airplanes identified as Groups 2, 3, 

4, and 5 in Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013: 

Accomplishing the repair or preventive 

modification of the frame at station 360, in 

accordance with the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, 

except as required by paragraph (n)(2) of this 

AD, terminates the inspections of that frame 

required by paragraphs (i) and (j) of this AD. 

(4) For airplanes identified as Group 6 in 

Boeing Alert Service Bulletin 737–53A1323, 

dated December 6, 2013: Accomplishing the 

repair or preventive modification of the 

frame at station 328, in accordance with the 

Accomplishment Instructions of Boeing Alert 

Service Bulletin 737–53A1323, dated 

December 6, 2013, except as required by 

paragraph (n)(2) of this AD, terminates the 

fuselage skin inspections and the station 328 

frame inspections required by paragraphs (i) 

and (j) of this AD. 

(n) Exceptions to Service Information 

(1) Where Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, 

specifies a compliance time after the 

‘‘original issue date of this service bulletin,’’ 

this AD requires compliance within the 

specified compliance time after the effective 

date of this AD. 

(2) If any cracking is found during any 

inspection required by this AD, and Boeing 

Alert Service Bulletin 737–53A1323, dated 

December 6, 2013, specifies to contact Boeing 

for appropriate action: Before further flight, 

repair the cracking using a method approved 

in accordance with the procedures specified 

in paragraph (q) of this AD. 

(3) The Condition column of Tables 4, 5, 

7, and 8 in paragraph 1.E., ‘‘Compliance,’’ of 

Boeing Alert Service Bulletin 737–53A1323, 

dated December 6, 2013, refers to total flight 

cycles ‘‘at the original issue date of this 

service bulletin.’’ This AD, however, applies 

to the airplanes with the specified total flight 

cycles as of the effective date of this AD. 

(o) Post-Repair Inspections and PostModification Inspections 

(1) The post-repair and post-modification 

inspections specified in tables 13 through 15 

of paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Alert Service Bulletin 737–53A1323, dated 

December 6, 2013, are not required by this 

AD. 

(2) The post-repair and post-modification 

inspections specified in Tables 13 through 15 

of paragraph 1.E., ‘‘Compliance,’’ of Boeing 

Alert Service Bulletin 737–53A1323, dated 

December 6, 2013, may be used in support 

of compliance with section 121.1109(c)(2) or 

129.109(b)(2) of the Federal Aviation 

Regulations (14 CFR 121.1109(c)(2) or 14 CFR 

129.109(b)(2)). The corresponding actions 

specified in the Accomplishment 

Instructions of Boeing Alert Service Bulletin 

737–53A1323, dated December 6, 2013, are 

not required by this AD. 

(p) Credit for Previous Actions 

This paragraph provides credit for repairs 

of the station 328, 344, 360, and 380 frames 

in the areas addressed by this AD that have 

been approved by the Boeing Organization 

Designation Authorization (ODA) via FAA 

Form 8100–9 (Statement of Compliance with 

Airworthiness Standards) prior to the 

effective date of this AD for the repairs 

specified in paragraphs (i), (j), (k), and (l) of 

this AD. 

(q) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Los Angeles 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 

paragraph (r) of this AD. Information may be 

emailed to: 9-ANM-LAACO-AMOCRequests@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the local flight standards district office/

certificate holding district office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair 

required by this AD if it is approved by the 

Boeing Commercial Airplanes Organization 

Designation Authorization that has been 

authorized by the Manager, Los Angeles 

ACO, to make those findings. For a repair 

method to be approved, the repair must meet 

the certification basis of the airplane, and the 

approval must specifically refer to this AD. 

(r) Related Information 

For more information about this AD, 

contact Galib Abumeri, Aerospace Engineer, 

Airframe Branch, ANM–120L, FAA, Los 

Angeles Aircraft Certification Office, 3960 

Paramount Boulevard, Lakewood, CA 90712– 

4137; phone: 562–627–5324; fax: 562–627– 

5210; email: galib.abumeri@faa.gov. 

(s) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

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Federal Register / Vol. 80, No. 228 / Friday, November 27, 2015 / Rules and Regulations 73955 

(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) Boeing Alert Service Bulletin 737– 

53A1323, dated December 6, 2013. 

(ii) Reserved. 

(3) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Data & Services 

Management, P.O. Box 3707, MC 2H–65, 

Seattle, WA 98124–2207; telephone 206– 

544–5000, extension 1; fax 206–766–5680; 

Internet https://www.myboeingfleet.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 October 

30, 2015. 

Michael Kaszycki, 

Acting Manager, Transport Airplane 

Directorate, Aircraft Certification Service. 

[FR Doc. 2015–28824 Filed 11–25–15; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2015–3642; Directorate 

Identifier 2015–CE–028–AD; Amendment 

39–18335; AD 2015–24–03] 

RIN 2120–AA64 

Airworthiness Directives; SOCATA 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for 

SOCATA Model TB 9, TB 10, TB 20, TB 

21, and TB 200 airplanes. This AD 

results from mandatory continuing 

airworthiness information (MCAI) 

issued 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 corrosion of the horizontal 

stabilizer. We are issuing this AD to 

require actions to address the unsafe 

condition on these products. 

DATES: This AD is effective January 4, 

2016. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in the AD 

as of January 4, 2016. 

ADDRESSES: You may examine the AD 

docket on the Internet at http://

www.regulations.gov by searching for 

and locating Docket No. FAA–2015– 

3642; or in person at 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 service information identified in 

this AD, contact SOCATA NORTH 

AMERICA, North Perry Airport, 601 NE 

10 Street, Pompano Beach, Florida 

33060; phone: (954) 366–3331; Internet: 

http://www.socatanorthamerica.com/

default.htm. You may view this 

referenced service information at the 

FAA, Small Airplane Directorate, 901 

Locust, Kansas City, Missouri 64106. 

For information on the availability of 

this material at the FAA, call (816) 329– 

4148. It is also available on the Internet 

at http://www.regulations.gov by 

searching for Docket No. FAA–2015– 

3642. 

FOR FURTHER INFORMATION CONTACT: 

Albert J. Mercado, Aerospace Engineer, 

FAA, Small Airplane Directorate, 901 

Locust, Room 301, Kansas City, 

Missouri 64106; telephone: (816) 329– 

4119; fax: (816) 329–4090; email: 

albert.mercado@faa.gov. 

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 SOCATA Models TB 9, TB 10, 

TB 20, TB 21, and TB 200 airplanes. The 

NPRM was published in the Federal 

Register on August 28, 2015 (80 FR 

52215). The NPRM proposed to correct 

an unsafe condition for the specified 

products and was based on mandatory 

continuing airworthiness information 

(MCAI) originated by an aviation 

authority of another country. The MCAI 

states: 

During accomplishment of SOCATA 

Service Bulletin (SB) SB10–152–55 at 

original issue, some operators reported 

finding heavy corrosion of the horizontal 

stabilizer (HS) spar. 

The results of the technical investigation 

have identified that the corrosion was caused 

by humidity ingress in the HS on aeroplanes 

subject to severe environmental conditions. 

This condition, if not detected and 

corrected, could result in buckling and 

permanent HS distortion, possibly resulting 

in reduced control of the aeroplane. 

To address this unsafe condition, SOCATA 

issued SB 10–152–55 Revision 1 to provide 

instructions for inspection and corrective 

action. 

For the reasons described above, this AD 

requires repetitive inspections of the affected 

area of the HS and, depending on findings, 

accomplishment of applicable corrective 

action(s). 

The MCAI can be found in the AD 

docket on the Internet at: http://

www.regulations.gov/

#!documentDetail;D=FAA-2015-3642- 

0001. 

Comments 

We gave the public the opportunity to 

participate in developing this AD. The 

following presents the comment 

received on the proposal and the FAA’s 

response to the comment. 

Request 

Anthony Pynes commented that that 

he does not believe the methodology 

used and the foundational data available 

supports the need for this AD, and thus 

he believes that this AD is not 

necessary. 

We do not agree. The FAA, in 

working with the State of Design 

airworthiness authority (EASA), 

determined that the actions of this AD 

on the horizontal stabilizer of the 

affected airplanes are necessary to 

correct an unsafe condition. Included in 

this is the risk in establishing such 

actions at the required compliance 

times. No changes to the AD have been 

made based on this comment. 

Conclusion 

We reviewed the relevant data, 

considered the comment received, and 

determined that air safety and the 

public interest require adopting the AD 

as proposed except for minor editorial 

changes. We have determined that these 

minor changes: 

• Are consistent with the intent that 

was proposed in the NPRM (80 FR 

52215, August 28, 2015) for correcting 

the unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM (80 FR 52215, 

August 28, 2015). 

Related Service Information Under 1 

CFR Part 51 

We reviewed DAHER–SOCATA TB 

Aircraft Mandatory Service Bulletin SB 

10–152, Amendment 1, dated April 

2015. The service information describes 

procedures for inspection for corrosion 

on the horizontal stabilizer spar and 

repair, if necessary. This service 

information is reasonably available 

because the interested parties have 

access to it through their normal course 

of business or by the means identified 

in the ADDRESSES section of the AD. 

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