43446 Federal Register / Vol. 86, No. 150 / Monday, August 9, 2021 / Proposed Rules 

(c) Applicability 

This AD applies to The Boeing Company 

Model 787–8, 787–9, and 787–10 airplanes, 

certificated in any category, powered by 

Rolls-Royce Trent 1000 engines. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 78, Thrust Reverser. 

(e) Unsafe Condition 

This AD was prompted by reports of 

damage to the thrust reverser (TR) translating 

sleeve secondary sliders due to contact 

between the slider and the slider track liner. 

This damage was only found on TR sleeves 

installed on certain engines. The FAA is 

issuing this AD to address this damage, 

which could result in failure of the TR 

translating sleeve secondary slider and 

possible detachment of the outer cowl, which 

could strike the fuselage, causing damage to 

the airplane, and could result in reduced 

control or performance of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued on or 

before the effective date of this AD: Except 

as specified by paragraph (h) of this AD; at 

the applicable times specified in the 

‘‘Compliance’’ paragraph of Boeing Alert 

Requirements Bulletin B787–81205– 

SB780043–00 RB, Issue 001, dated January 

15, 2021, do all applicable actions for Group 

1, Configuration 1 airplanes as identified in, 

and in accordance with, the Accomplishment 

Instructions of Boeing Alert Requirements 

Bulletin B787–81205–SB780043–00 RB, Issue 

001, dated January 15, 2021. 

Note 1 to paragraph (g): Guidance for 

accomplishing the actions required by this 

AD can be found in Boeing Alert Service 

Bulletin B787–81205–SB780043–00, Issue 

001, dated January 15, 2021, which is 

referred to in Boeing Alert Requirements 

Bulletin B787–81205–SB780043–00 RB, Issue 

001, dated January 15, 2021. 

(h) Exceptions to Service Information 

Specifications 

(1) Where Boeing Alert Requirements 

Bulletin B787–81205–SB780043–00 RB, Issue 

001, dated January 15, 2021, uses the phrase 

‘‘the issue 001 date of Requirements Bulletin 

B787–81205–SB780043–00 RB,’’ this AD 

requires using ‘‘the effective date of this AD.’’ 

(2) Where Boeing Alert Requirements 

Bulletin B787–81205–SB780043–00 RB, Issue 

001, dated January 15, 2021, specifies 

contacting Boeing for repair instructions or 

for instructions to address certain conditions: 

This AD requires doing the repair or doing 

the instructions using a method approved in 

accordance with the procedures specified in 

paragraph (j) of this AD. 

(i) Parts Installation Limitations 

(1) As of the applicable compliance time 

specified in paragraph (i)(1)(i) or (ii) of this 

AD, no person may install on any airplane a 

TR with serial number between 00110001 

and 00312001 inclusive, on which all 

applicable inspections and corrective actions 

required by paragraph (g) of this AD have not 

been accomplished. 

(i) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued on or 

before the effective date of this AD: After 

accomplishing the actions required by 

paragraph (g) of this AD. 

(ii) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued after the 

effective date of this AD: As of the effective 

date of this AD. 

(2) As of the applicable compliance time 

specified in paragraph (i)(2)(i) or (ii) of this 

AD, no person may install on any airplane a 

TR translating sleeve with serial number 

00125001 and subsequent, on which all 

applicable inspections and corrective actions 

required by paragraph (g) of this AD have not 

been accomplished. 

(i) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued on or 

before the effective date of this AD: After 

accomplishing the actions required by 

paragraph (g) of this AD. 

(ii) For airplanes with an original 

airworthiness certificate or original export 

certificate of airworthiness issued after the 

effective date of this AD: As of the effective 

date of this AD. 

(3) As of the effective date of this AD, no 

person may install a TR translating sleeve 

that was originally installed on any airplane 

with an original airworthiness certificate or 

original export certificate of airworthiness 

issued after the effective date of this AD; or 

a TR translating sleeve with serial number 

00125001 and subsequent, on which all 

applicable inspections and corrective actions 

specified in Boeing Alert Requirements 

Bulletin B787–81205–SB780043–00 RB, Issue 

001, dated January 15, 2021, have been 

accomplished; on any airplane with a TR 

with a serial number between 00110001 and 

00312001 inclusive, unless all applicable 

inspections and corrective actions specified 

in Boeing Alert Requirements Bulletin B787– 

81205–SB780043–00 RB, Issue 001, dated 

January 15, 2021, have been accomplished on 

that TR, except as specified in paragraph 

(h)(2) of this AD. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Seattle ACO Branch, 

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 responsible Flight 

Standards Office, as appropriate. If sending 

information directly to the manager of the 

certification office, send it to the attention of 

the person identified in Related Information. 

Information may be emailed to: 9-ANMSeattle-ACO-AMOC-Requests@faa.gov. 

(2) Before using any approved AMOC, 

notify your appropriate principal inspector, 

or lacking a principal inspector, the manager 

of the responsible Flight Standards Office. 

(3) An AMOC that provides an acceptable 

level of safety may be used for any repair, 

modification, or alteration required by this 

AD if it is approved by The Boeing Company 

Organization Designation Authorization 

(ODA) that has been authorized by the 

Manager, Seattle ACO Branch, FAA, to make 

those findings. To be approved, the repair 

method, modification deviation, or alteration 

deviation must meet the certification basis of 

the airplane, and the approval must 

specifically refer to this AD. 

(k) Related Information 

(1) For more information about this AD, 

contact Tak Kobayashi, Aerospace Engineer, 

Propulsion Section, FAA, Seattle ACO 

Branch, 2200 South 216th St., Des Moines, 

WA 98198; phone and fax: 206–231–3553; 

email: takahisa.kobayashi@faa.gov. 

(2) For service information identified in 

this AD, contact Boeing Commercial 

Airplanes, Attention: Contractual & Data 

Services (C&DS), 2600 Westminster Blvd., 

MC 110–SK57, Seal Beach, CA 90740–5600; 

telephone 562–797–1717; internet https://

www.myboeingfleet.com. You may view this 

referenced service information at the FAA, 

Airworthiness Products Section, Operational 

Safety Branch, 2200 South 216th St., Des 

Moines, WA. For information on the 

availability of this material at the FAA, call 

206–231–3195. 

Issued on July 13, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–16680 Filed 8–6–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0213; Project 

Identifier 2018–CE–036–AD] 

RIN 2120–AA64 

Airworthiness Directives; Pacific 

Aerospace Limited Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

certain Pacific Aerospace Limited 

Model 750XL airplanes. 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 identifies the unsafe 

condition as insufficient separation of 

ground terminations for individual 

power sources and static grounds. This 

proposed AD would require inspecting 

and separating, if applicable, the battery 


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Federal Register / Vol. 86, No. 150 / Monday, August 9, 2021 / Proposed Rules 43447 

and generator common ground 

connections on the airframe. The FAA 

is proposing this AD to address the 

unsafe condition on these products. 

DATES: The FAA must receive comments 

on this proposed AD by September 23, 

2021. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

https://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 NPRM, contact the Civil Aviation 

Authority of New Zealand, Level 15, 

Asteron Centre, 55 Featherston Street, 

Wellington 6011; phone: +64 4 560 

9400; fax: +64 4 569 2024; email: info@

caa.govt.nz. You may review this 

referenced service information at the 

FAA, Airworthiness Products Section, 

Operational Safety Branch, 901 Locust, 

Kansas City, MO 64106. For information 

on the availability of this material at the 

FAA, call (816) 329–4148. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0213; or in person at Docket 

Operations between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal 

holidays. The AD docket contains this 

NPRM, the MCAI, any comments 

received, and other information. The 

street address for Docket Operations is 

listed above. 

FOR FURTHER INFORMATION CONTACT: 

Mike Kiesov, Aviation Safety Engineer, 

FAA, General Aviation & Rotorcraft 

Section, International Validation 

Branch, 901 Locust, Room 301, Kansas 

City, MO 64106; phone: (816) 329–4144; 

fax: (816) 329–4090; email: 

mike.kiesov@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

The FAA invites 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–2021–0213; Project 

Identifier 2018–CE–036–AD’’ at the 

beginning of your comments. The FAA 

specifically invites comments on the 

overall regulatory, economic, 

environmental, and energy aspects of 

this NPRM. The FAA will consider all 

comments received by the closing date 

and may amend this NPRM because of 

those comments. 

Except for Confidential Business 

Information (CBI) as described in the 

following paragraph, and other 

information as described in 14 CFR 

11.35, the FAA will post all comments 

received, without change, to https://

www.regulations.gov, including any 

personal information you provide. The 

agency will also post a report 

summarizing each substantive verbal 

contact received about this NPRM. 

Confidential Business Information 

CBI is commercial or financial 

information that is both customarily and 

actually treated as private by its owner. 

Under the Freedom of Information Act 

(FOIA) (5 U.S.C. 552), CBI is exempt 

from public disclosure. If your 

comments responsive to this NPRM 

contain commercial or financial 

information that is customarily treated 

as private, that you actually treat as 

private, and that is relevant or 

responsive to this NPRM, it is important 

that you clearly designate the submitted 

comments as CBI. Please mark each 

page of your submission containing CBI 

as ‘‘PROPIN.’’ The FAA will treat such 

marked submissions as confidential 

under the FOIA, and they will not be 

placed in the public docket of this AD. 

Submissions containing CBI should be 

sent to Mike Kiesov, Aviation Safety 

Engineer, FAA, General Aviation & 

Rotorcraft Section, International 

Validation Branch, 901 Locust, Room 

301, Kansas City, MO 64106. Any 

commentary that the FAA receives 

which is not specifically designated as 

CBI will be placed in the public docket 

for this rulemaking. 

Background 

The Civil Aviation Authority (CAA), 

which is the aviation authority for New 

Zealand, has issued DCA/750XL/30, 

dated July 5, 2018 (referred to after this 

as ‘‘the MCAI’’), to address an unsafe 

condition on Pacific Aerospace Limited 

Model 750XL airplanes. The MCAI 

states: 

The ground connections for the individual 

power sources (BATT & GEN [battery and 

generator]) have been connected at a common 

ground point on the aircraft. DCA/750XL/30 

is issued to mandate the instructions in 

Pacific Aerospace Mandatory Service 

Bulletin (MSB) PACSB/XL/104 issue 1, dated 

2 May 2018, or later approved revision to 

separate the common ground connection on 

the airframe for the individual power sources 

(BATT & GEN). 

The CAA advises the root cause is a 

deviation from the approved 

engineering data. This condition, if not 

corrected, could lead to the loss of 

primary and secondary power sources 

from corrosion of the ground connection 

or failure of the fastening hardware, 

which could result in the simultaneous 

loss of multiple systems. According to 

the CAA, this condition was observed 

on the production line and has been 

corrected for new airplanes in 

production. The MCAI requires 

inspecting the battery ground 

connections and separating the ground 

connections as necessary. You may 

examine the MCAI in the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0213. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Pacific Aerospace 

Mandatory Service Bulletin PACSB/XL/ 

104, Issue 1, dated May 2, 2018 

(PACSB/XL/104I1). The service 

information specifies procedures for 

inspecting the battery ground 

connections and separating the ground 

connections as 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. 

FAA’s Determination 

This product has been approved by 

the aviation authority of another 

country, and is approved for operation 

in the United States. Pursuant to the 

FAA’s bilateral agreement with this 

State of Design Authority, it has notified 

the FAA of the unsafe condition 

described in the MCAI and service 

information referenced above. The FAA 

is issuing this NPRM after determining 

that the unsafe condition described 

previously is likely to exist or develop 

on other products of the same type 

design. 

Proposed AD Requirements 

This proposed AD would require 

accomplishing the actions specified in 

the service information already 

described. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 23 

airplanes of U.S. registry. The FAA also 

estimates that it would take about 1 

work-hour per airplane to comply with 

the grounding connection inspection of 


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43448 Federal Register / Vol. 86, No. 150 / Monday, August 9, 2021 / Proposed Rules 

this proposed AD. The average labor 

rate is $85 per work-hour. 

Based on these figures, the FAA 

estimates the cost of the proposed 

inspection on U.S. operators to be 

$1,955, or $85 per airplane. 

In addition, the FAA estimates that 

any necessary action to separate the 

connections would take about 3 workhours and require parts costing $25, for 

a cost of $280 per airplane. The FAA 

has no way of determining the number 

of products that may need these actions. 

The FAA has included all costs in this 

cost estimate. According to the 

manufacturer, however, some of the 

costs of this proposed AD may be 

covered under warranty, thereby 

reducing the cost impact on affected 

operators. 

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. 

The FAA is 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 

The FAA 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) Would not affect intrastate 

aviation in Alaska, and 

(3) Would 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: 

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: 

Pacific Aerospace Limited: Docket No. FAA– 

2021–0213; Project Identifier 2018–CE– 

036–AD. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by September 

23, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Pacific Aerospace 

Limited Model 750XL airplanes, serial 

numbers up to and including 222, 

certificated in any category, with the battery 

installed within the engine bay at the 

firewall. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 2400, Electric Power System. 

(e) Reason 

This AD was prompted by 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 

identifies the unsafe condition as insufficient 

separation of ground terminations for 

individual power sources and static grounds. 

The FAA is issuing this AD to detect and 

correct ground terminations with insufficient 

separation, which could lead to loss of 

primary and secondary power sources if the 

ground connection fails and consequent 

simultaneous loss of multiple airplane 

systems. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Inspection and Corrective Action 

(1) Within 12 months after the effective 

date of this AD, inspect the battery 

installation in the engine bay to determine if 

the ground leads connect to a single ground 

stud as shown in the Accomplishment 

Instructions, figure 2, of Pacific Aerospace 

Mandatory Service Bulletin PACSB/XL/104, 

Issue 1, dated May 2, 2018 (PACSB/XL/ 

104I1). 

(2) If the ground leads connect to a single 

ground stud, before further flight, separate 

the battery ground lead connections by 

following the Accomplishment Instructions, 

steps 4 through 36, of PACSB/XL/104I1. 

(h) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, International Validation 

Branch, 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 

certification office, send it to the attention of 

the person identified in Related Information 

or email: 9-AVS-AIR-730-AMOC@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. 

(i) Related Information 

(1) Refer to Civil Aviation Authority (CAA) 

of New Zealand AD DCA/750XL/30, dated 

July 5, 2018, for related information. You 

may examine the CAA AD at https://

www.regulations.gov by searching for and 

locating Docket No. FAA–2021–0213. 

(2) For more information about this AD 

contact Mike Kiesov, Aviation Safety 

Engineer, FAA, General Aviation & Rotorcraft 

Section, International Validation Branch, 901 

Locust, Room 301, Kansas City, MO 64106; 

(816) 329–4144; fax: (816) 329–4090; email: 

mike.kiesov@faa.gov. 

(3) For service information related to this 

AD, contact the Civil Aviation Authority of 

New Zealand, Level 15, Asteron Centre, 55 

Featherston Street, Wellington 6011; phone: 

+64 4 560 9400; fax: +64 4 569 2024; email: 

info@caa.govt.nz. You may review this 

referenced service information at the FAA, 

Airworthiness Products Section, Operational 

Safety Branch, 901 Locust, Kansas City, MO 

64106. For information on the availability of 

this material at the FAA, call (816) 329–4148. 

Issued on July 29, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–16659 Filed 8–6–21; 8:45 am] 

BILLING CODE 4910–13–P 


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