This section of the FEDERAL REGISTER

contains regulatory documents having general

applicability and legal effect, most of which

are keyed to and codified in the Code of

Federal Regulations, which is published under

50 titles pursuant to 44 U.S.C. 1510.

The Code of Federal Regulations is sold by

the Superintendent of Documents.

Rules and Regulations Federal Register

30753 

Vol. 86, No. 110 

Thursday, June 10, 2021 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0458; Project 

Identifier MCAI–2021–00595–T; Amendment 

39–21602; AD 2021–12–15] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all 

Airbus SAS Model A330–243, A330– 

243F, A330–341, A330–342, and A330– 

343 airplanes. This AD was prompted 

by a report of an in-flight turnback due 

to loss of green and blue hydraulic 

systems in cruise. This AD requires 

inspecting for discrepancies of the 

hydraulic pressure switch harnesses of 

affected engines, and applicable 

corrective actions, as specified in a 

European Union Aviation Safety Agency 

(EASA) AD, which is incorporated by 

reference. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

DATES: This AD becomes effective June 

25, 2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of June 25, 2021. 

The FAA must receive comments on 

this AD by July 26, 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 material incorporated by reference 

(IBR) in this AD, contact EASA, KonradAdenauer-Ufer 3, 50668 Cologne, 

Germany; telephone +49 221 8999 000; 

email ADs@easa.europa.eu; internet 

www.easa.europa.eu. You may find this 

IBR material on the EASA website at 

https://ad.easa.europa.eu. You may 

view this IBR material 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. 

It is also available in the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0458. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0458; 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 

AD, any comments received, and other 

information. The street address for 

Docket Operations is listed above. 

FOR FURTHER INFORMATION CONTACT: 

Vladimir Ulyanov, Aerospace Engineer, 

Large Aircraft Section, International 

Validation Branch, FAA, 2200 South 

216th St., Des Moines, WA 98198; 

telephone and fax 206–231–3229; email 

Vladimir.Ulyanov@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2021–0128, 

dated May 17, 2021 (EASA AD 2021– 

0128) (also referred to as the Mandatory 

Continuing Airworthiness Information, 

or the MCAI), to correct an unsafe 

condition for all Airbus SAS Model 

A330–243, A330–243F, A330–341, 

A330–342, and A330–343 airplanes. 

This AD was prompted by a report of 

a Model A330 airplane equipped with 

Rolls-Royce Trent 700 engines that 

experienced an in-flight turnback due to 

loss of green and blue hydraulic systems 

in cruise. On the green hydraulic 

system, electronic centralized aircraft 

monitoring (ECAM) warnings HYD G 

ENG 2 PUMP LO PR and G SYS LO PR 

were triggered, resulting in loss of the 

green hydraulic system. On the blue 

hydraulic system, ECAM warning HYD 

B ENG 1 PUMP LO PR was triggered, 

and the flightcrew selected the blue 

hydraulic system engine-driven pump 

(EDP) OFF, per flightcrew operating 

manual procedures. Subsequent 

inspections of engine #1 revealed that 

during a previous maintenance shop 

visit, and following partial re-routing of 

hydraulic harnesses, the blue and green 

EDP pressure switch electrical 

connectors (4001JG2–A and 4001JG1–A) 

were inadvertently cross connected. As 

a result, the blue hydraulic system was 

declared faulty (ECAM message) in 

flight, when actually the green 

hydraulic system had failed with low 

pressure. The FAA is issuing this AD to 

address the potential loss of two 

hydraulic systems (blue and green) in 

flight, instead of only one (green), which 

could lead to loss of all hydraulic 

circuits, possibly resulting in loss of 

control of the airplane. See the MCAI for 

additional background information. 

Related Service Information Under 1 

CFR Part 51 

EASA AD 2021–0128 specifies 

procedures for a general visual 

inspection for discrepancies (including 

incorrect harness routing and pump 

pressure connections) of the hydraulic 

pressure switch harnesses of affected 

engines. EASA AD 2021–0128 also 

describes corrective actions including a 

visual inspection to identify the clip 

points where harnesses are not installed 

correctly, harness re-routing, and 

hydraulic system testing. This material 

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 the State 

of Design Authority, the FAA has been 

notified of the unsafe condition 

described in the MCAI referenced 

above. The FAA is issuing this AD 


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30754 Federal Register / Vol. 86, No. 110 / Thursday, June 10, 2021 / Rules and Regulations 

because the FAA evaluated all pertinent 

information and determined the unsafe 

condition exists and is likely to exist or 

develop on other products of the same 

type design. 

Requirements of This AD 

This AD requires accomplishing the 

actions specified in EASA AD 2021– 

0128 described previously, as 

incorporated by reference, except for 

any differences identified as exceptions 

in the regulatory text of this AD. 

Explanation of Required Compliance 

Information 

In the FAA’s ongoing efforts to 

improve the efficiency of the AD 

process, the FAA developed a process to 

use certain civil aviation authority 

(CAA) ADs as the primary source of 

information for compliance with 

requirements for corresponding FAA 

ADs. The FAA has been coordinating 

this process with manufacturers and 

CAAs. As a result, EASA AD 2021–0128 

is incorporated by reference in this AD. 

This AD, therefore, requires compliance 

with EASA AD 2021–0128 in its 

entirety, through that incorporation, 

except for any differences identified as 

exceptions in the regulatory text of this 

AD. Using common terms that are the 

same as the heading of a particular 

section in EASA AD 2021–0128 does 

not mean that operators need comply 

only with that section. For example, 

where the AD requirement refers to ‘‘all 

required actions and compliance times,’’ 

compliance with this AD requirement is 

not limited to the section titled 

‘‘Required Action(s) and Compliance 

Time(s)’’ in EASA AD 2021–0128. 

Service information specified in EASA 

AD 2021–0128 that is required for 

compliance with it is available at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0458. 

Justification for Immediate Adoption 

and Determination of the Effective Date 

Section 553(b)(3)(B) of the 

Administrative Procedure Act (APA) (5 

U.S.C. 551 et seq.) authorizes agencies 

to dispense with notice and comment 

procedures for rules when the agency, 

for ‘‘good cause,’’ finds that those 

procedures are ‘‘impracticable, 

unnecessary, or contrary to the public 

interest.’’ Under this section, an agency, 

upon finding good cause, may issue a 

final rule without providing notice and 

seeking comment prior to issuance. 

Further, section 553(d) of the APA 

authorizes agencies to make rules 

effective in less than thirty days, upon 

a finding of good cause. 

An unsafe condition exists that 

requires the immediate adoption of this 

AD without providing an opportunity 

for public comments prior to adoption. 

The FAA has found that the risk to the 

flying public justifies forgoing notice 

and comment prior to adoption of this 

rule because the loss of the blue and 

green hydraulic systems in flight could 

lead to loss of all hydraulic circuits, 

possibly resulting in loss of control of 

the airplane. Accordingly, notice and 

opportunity for prior public comment 

are impracticable and contrary to the 

public interest pursuant to 5 U.S.C. 

553(b)(3)(B). 

In addition, the FAA finds that good 

cause exists pursuant to 5 U.S.C. 553(d) 

for making this amendment effective in 

less than 30 days, for the same reasons 

the FAA found good cause to forgo 

notice and comment. 

Comments Invited 

The FAA invites you to send any 

written relevant data, views, or 

arguments about this AD. Send your 

comments to an address listed under 

ADDRESSES. Include ‘‘Docket No. FAA– 

2021–0458; Project Identifier MCAI– 

2021–00595–T’’ at the beginning of your 

comments. The most helpful comments 

reference a specific portion of the final 

rule, explain the reason for any 

recommended change, and include 

supporting data. The FAA will consider 

all comments received by the closing 

date and may amend this final rule 

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 final rule. 

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 AD 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 AD, 

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 Vladimir Ulyanov, 

Aerospace Engineer, Large Aircraft 

Section, International Validation 

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

Moines, WA 98198; telephone and fax 

206–231–3229; email 

Vladimir.Ulyanov@faa.gov. Any 

commentary that the FAA receives 

which is not specifically designated as 

CBI will be placed in the public docket 

for this rulemaking. 

Regulatory Flexibility Act (RFA) 

The requirements of the RFA do not 

apply when an agency finds good cause 

pursuant to 5 U.S.C. 553 to adopt a rule 

without prior notice and comment. 

Because the FAA has determined that it 

has good cause to adopt this rule 

without notice and comment, RFA 

analysis is not required. 

Costs of Compliance 

The FAA estimates that this AD 

affects 56 airplanes of U.S. registry. The 

FAA estimates the following costs to 

comply with this AD: 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

3 work-hours × $85 per hour = $255 .......................................................................................... $0 $255 $14,280 

The FAA estimates the following 

costs to do any necessary on-condition 

actions that would be required based on 

the results of any required actions. The 

FAA has no way of determining the 

number of aircraft that might need these 

on-condition actions: 


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Federal Register / Vol. 86, No. 110 / Thursday, June 10, 2021 / Rules and Regulations 30755 

ESTIMATED COSTS OF ON-CONDITION ACTIONS

Labor cost Parts cost Cost per 

product 

8 work-hours × $85 per hour = $680 ...................................................................................................................... $0 $680 

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 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, 

and 

(2) Will not affect intrastate aviation 

in Alaska. 

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: 

2021–12–15 Airbus SAS: Amendment 39– 

21602; Docket No. FAA–2021–0458; 

Project Identifier MCAI–2021–00595–T. 

(a) Effective Date 

This airworthiness directive (AD) becomes 

effective June 25, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Airbus SAS Model 

A330–243, A330–243F, A330–341, A330– 

342, and A330–343 airplanes, certificated in 

any category. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 71, Powerplant. 

(e) Reason 

This AD was prompted by a report of an 

in-flight turnback due to loss of green and 

blue hydraulic systems in cruise. The FAA is 

issuing this AD to address the potential loss 

of the blue and green hydraulic systems in 

flight, which could lead to loss of all 

hydraulic circuits, possibly resulting in loss 

of control of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Requirements 

Except as specified in paragraph (h) of this 

AD: Comply with all required actions and 

compliance times specified in, and in 

accordance with, European Union Aviation 

Safety Agency (EASA) AD 2021–0128, dated 

May 17, 2021 (EASA AD 2021–0128). 

(h) Exceptions to EASA AD 2021–0128 

(1) Where EASA AD 2021–0128 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(2) Where paragraph (2) of EASA AD 2021– 

0128 specifies actions if ‘‘discrepancies are 

found,’’ for this AD ‘‘discrepancies’’ include 

incorrect harness routing and pump pressure 

connections. 

(3) The ‘‘Remarks’’ section of EASA AD 

2021–0128 does not apply to this AD. 

(i) No Reporting Requirement 

Although the service information 

referenced in EASA AD 2021–0128 specifies 

to submit certain information to the 

manufacturer, this AD does not include that 

requirement. 

(j) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, Large Aircraft 

Section, International Validation 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 Large Aircraft 

Section, International Validation Branch, 

send it to the attention of the person 

identified in paragraph (k) of this AD. 

Information may be emailed to: 9-AVS-AIR730-AMOC@faa.gov. Before using any 

approved AMOC, notify your appropriate 

principal inspector, or lacking a principal 

inspector, the manager of the responsible 

Flight Standards Office. 

(2) Contacting the Manufacturer: For any 

requirement in this AD to obtain instructions 

from a manufacturer, the instructions must 

be accomplished using a method approved 

by the Manager, Large Aircraft Section, 

International Validation Branch, FAA; or 

EASA; or Airbus SAS’s EASA Design 

Organization Approval (DOA); or RollsRoyce’s EASA DOA. If approved by a DOA, 

the approval must include the DOAauthorized signature. 

(3) Required for Compliance (RC): If any 

service information referenced in EASA AD 

2021–0128 contains paragraphs that are 

labeled as RC, the instructions in RC 

paragraphs, including subparagraphs under 

an RC paragraph, must be done to comply 

with this AD; any paragraphs, including 

subparagraphs under those paragraphs, that 

are not identified as RC are recommended. 

The instructions in paragraphs, including 

subparagraphs under those paragraphs, not 

identified as RC may be deviated from using 

accepted methods in accordance with the 

operator’s maintenance or inspection 

program without obtaining approval of an 

AMOC, provided the instructions identified 

as RC can be done and the airplane can be 

put back in an airworthy condition. Any 

substitutions or changes to instructions 

identified as RC require approval of an 

AMOC. 

(k) Related Information 

For more information about this AD, 

contact Vladimir Ulyanov, Aerospace 

Engineer, Large Aircraft Section, 

International Validation Branch, FAA, 2200 

South 216th St., Des Moines, WA 98198; 

telephone and fax 206–231–3229; email 

Vladimir.Ulyanov@faa.gov. 

(l) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 


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30756 Federal Register / Vol. 86, No. 110 / Thursday, June 10, 2021 / Rules and Regulations 

(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) European Union Aviation Safety Agency 

(EASA) AD 2021–0128, dated May 17, 2021. 

(ii) [Reserved] 

(3) For EASA AD 2021–0128, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 8999 

000; email ADs@easa.europa.eu; internet 

www.easa.europa.eu. You may find this 

EASA AD on the EASA website at https://

ad.easa.europa.eu. 

(4) You may view this material 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. This material may be found 

in the AD docket at https://

www.regulations.gov by searching for and 

locating Docket No. FAA–2021–0458. 

(5) You may view this material that is 

incorporated by reference at the National 

Archives and Records Administration 

(NARA). For information on the availability 

of this material at NARA, email fedreg.legal@

nara.gov, or go to https://www.archives.gov/ 

federal-register/cfr/ibr-locations.html. 

Issued on June 6, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–12301 Filed 6–8–21; 4:15 pm] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0881; Project 

Identifier 2018–CE–024–AD; Amendment 

39–21578; AD 2021–11–16] 

RIN 2120–AA64 

Airworthiness Directives; Piper 

Aircraft, Inc. Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 79–01–03, 

which applied to certain Piper Aircraft, 

Inc. (Piper) Model PA–36–285 airplanes, 

and AD 83–20–03, which applied to 

Piper Models PA–36–285, PA–36–300, 

and PA–36–375 airplanes. AD 79–01–03 

required repetitive inspections of the 

spar carry through assembly until 

replaced with a different part numbered 

spar carry through assembly. AD 83–20– 

03 established life limits for the wing 

spar structural components. This AD 

retains the requirements in AD 79–01– 

03 and AD 83–20–03 and requires the 

spar carry through assembly inspection 

from AD 79–01–03 for additional 

airplanes and adds life limits for certain 

wing structural components previously 

omitted from AD 83–20–03 for certain 

serial numbered airplanes. The FAA is 

issuing this AD to address the unsafe 

condition on these products. 

DATES: This AD is effective July 15, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of July 15, 2021. 

ADDRESSES: For service information 

identified in this final rule, contact 

Piper Aircraft, Inc., 2926 Piper Drive, 

Vero Beach, FL 32960; phone: (772) 

567–4361; website: https://

www.piper.com. You may view this 

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. It is also 

available at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2020–0881. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–0881; 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 

final rule, any comments received, and 

other information. The address for 

Docket Operations is 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: Dan 

McCully, Aviation Safety Engineer, 

FAA, Atlanta ACO Branch, 1701 

Columbia Avenue, College Park, GA 

30337; phone: (404) 474–5548; fax: (404) 

474–5606; email: william.mccully@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 79–01–03, 

Amendment 39–3383 (44 FR 36, January 

2, 1979), Docket No. 78–EA–69 (AD 79– 

01–03) and AD 83–20–03, Amendment 

39–4739 (48 FR 45535, October 6, 1983), 

Docket No. 83–CE–23–AD (AD 83–20– 

03). AD 79–01–03 applied to certain 

Piper Model PA–36–285 airplanes and 

required repetitive inspections of spar 

carry through assembly part number 

(P/N) 97370–00, with repair as 

necessary, until the spar carry through 

assembly is replaced with P/N 76824– 

02. AD 83–20–03 applied to Piper 

Models PA–36–285, PA–36–300, and 

PA–36–375 airplanes and established 

life limits for certain wing structural 

components. 

The NPRM published in the Federal 

Register on March 23, 2021 (86 FR 

15439). The NPRM was prompted by 

inconsistencies between the two ADs 

and the airplanes’ type certificate. The 

FAA determined that the life limits for 

the spar carry through assembly, P/N 

97370–00 or 76824–02, were 

inadvertently omitted from AD 83–20– 

03 for certain airplanes. In the NPRM, 

the FAA proposed to add the life limit 

for the spar carry through assembly for 

Models PA–36–285 and PA–36–300 

airplanes, serial numbers 36–7660123 

through 36–8160023; and Model PA– 

36–375 airplanes, serial numbers 36– 

7802001 through 36–8302025. The FAA 

also determined the repetitive 

inspections of the spar carry through 

assembly required by AD 79–01–03 

should apply to both Model PA–36–285 

and Model PA–36–300 airplanes until 

the life limit replacement of the spar 

carry through assembly with P/N 

76824–02. In the NPRM, the FAA also 

proposed to require adding the 

repetitive inspections for the Model PA– 

36–300 airplanes. After the initial life 

limit replacement of the wing spar carry 

through assembly, P/N 97370–00 with 

P/N 76824–02, the repetitive 

inspections will no longer be required. 

The FAA is issuing this AD to address 

the unsafe condition on these products. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received no comments on 

the NPRM or on the determination of 

the costs. 

Conclusion 

The FAA reviewed the relevant data 

and determined that air safety requires 

adoption of the AD as proposed. 

Accordingly, the FAA is issuing this AD 

to address the unsafe condition on these 

products. This AD is adopted as 

proposed in the NPRM. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Piper Service 

Bulletin No. 552A, dated August 3, 2018 

(Piper SB No. 552A); Piper Aircraft PA– 

36, Pawnee Brave Kit 764–394, Right 

Wing Main Spar Caps Replacement, 

dated June 9, 2012 (Piper Kit 764–394); 

and Piper Aircraft PA–36, Pawnee Brave 


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