Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 10767 

(l) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) Canadian 

AD CF–2020–09, dated April 7, 2020, for 

related information. This MCAI may be 

found in the AD docket on the internet at 

https://www.regulations.gov by searching for 

and locating Docket No. FAA–2020–0691. 

(2) For more information about this AD, 

contact Andrea Jimenez, Aerospace Engineer, 

Airframe and Propulsion Section, FAA, New 

York ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 

516–228–7330; fax 516–794–5531; email 9- 

avs-nyaco-cos@faa.gov. 

(m) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 

(IBR) of the service information listed in this 

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

part 51. 

(2) You must use this service information 

as applicable to do the actions required by 

this AD, unless this AD specifies otherwise. 

(i) Bombardier Service Bulletin 601R–32– 

112, dated November 11, 2019. 

(ii) [Reserved] 

(3) For service information identified in 

this AD, contact MHI RJ Aviation ULC, 12655 

Henri-Fabre Blvd., Mirabel, Que ́bec, J7N 1E1 

Canada; Widebody Customer Response 

Center North America toll-free telephone +1– 

844–272–2720 or direct-dial telephone +1– 

514–855–8500; fax +1–514–855–8501; email 

thd.crj@mhirj.com; internet https://

mhirj.com. 

(4) You may view this 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. 

(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, 

email fedreg.legal@nara.gov, or go to: https:// 

www.archives.gov/federal-register/cfr/ibrlocations.html. 

Issued on December 28, 2020. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–03565 Filed 2–22–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0674; Product 

Identifier 2020–NM–070–AD; Amendment 

39–21382; AD 2021–01–06] 

RIN 2120–AA64 

Airworthiness Directives; Airbus SAS 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Airbus SAS Model A330–200 and 

A330–300 series airplanes, and all 

Model A340–200 and A340–300 series 

airplanes. This AD was prompted by 

reports of hydraulic system failure due 

to fatigue failure of the screws attaching 

the manual valve to the ground service 

manifold (GSM). This AD requires, for 

certain GSMs, repetitive replacement of 

the hydraulic system GSM manual valve 

attachment screws having certain part 

numbers; and, for certain other GSMs 

with certain screws installed, 

replacement of those screws, 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 is effective March 30, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of March 30, 2021. 

ADDRESSES: For EASA material 

incorporated by reference (IBR) in this 

AD, contact the 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. For Airbus 

material incorporated by reference in 

this AD, contact Airbus SAS, 

Airworthiness Office—EAL, Rond-Point 

Emile Dewoitine No: 2, 31700 Blagnac 

Cedex, France; telephone +33 5 61 93 36 

96; fax +33 5 61 93 45 80; email 

airworthiness.A330-A340@airbus.com; 

internet http://www.airbus.com. 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 on 

the internet at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

0674. 

Examining the AD Docket 

You may examine the AD docket on 

the internet at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

0674; 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: 

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: 

Discussion 

The EASA, which is the Technical 

Agent for the Member States of the 

European Union, has issued EASA AD 

2020–0093, dated April 24, 2020 (EASA 

AD 2020–0093) (also referred to as the 

Mandatory Continuing Airworthiness 

Information, or ‘‘the MCAI’’), to correct 

an unsafe condition for certain Airbus 

SAS Model A330–200 and A330–300 

series airplanes, and all Model A340– 

200 and A340–300 series airplanes. 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to certain Airbus SAS Model 

A330–200 and A330–300 series 

airplanes, and all Model A340–200 and 

A340–300 series airplanes. The NPRM 

published in the Federal Register on 

July 31, 2020 (85 FR 46012). The NPRM 

was prompted by reports of hydraulic 

system failure due to fatigue failure of 

the screws attaching the manual valve to 

the GSM. The NPRM proposed to 

require, for certain GSMs, repetitive 

replacement of the hydraulic system 

GSM manual valve attachment screws 

having certain part numbers; and, for 

certain other GSMs with certain screws 

installed, replacement of those screws, 

as specified in an EASA AD. 

Comments 

The FAA gave the public the 

opportunity to participate in developing 

this final rule. The following presents 

the comments received on the NPRM 

10768 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 

and the FAA’s response to each 

comment. 

Support for the NPRM 

The Air Line Pilots Association, 

International (ALPA) stated its support 

for the NPRM. 

Request To Include Applicability 

Exception 

Delta Air Lines (Delta) asked that the 

FAA include an exception statement in 

paragraph (c) of the proposed AD 

related to Airbus modification 58345. 

Delta stated that EASA AD 2020–0093 

includes the statement ‘‘except those on 

which Airbus modification (mod) 58345 

has been embodied in production.’’ 

Delta added that this would remove the 

need for operators of post mod 58345 

airplanes to demonstrate compliance 

with an AD for which compliance is 

impossible. 

The FAA does not agree with the 

commenter’s request. Paragraph (c) of 

this AD identifies the affected airplane 

models and specifies that this AD is 

applicable to the airplanes identified in 

EASA AD 2020–0093. Because the 

applicability identified in EASA AD 

2020–0093 excludes airplanes on which 

Airbus modification 58345 is embodied 

in production, it is not necessary to 

restate that exclusion in this AD. EASA 

AD 2020–0093 is incorporated by 

reference in its entirety, which includes 

the applicability therein. Therefore, the 

FAA has not changed this AD in this 

regard. 

Request To Change AOT Reference 

Delta asked that the ‘‘in accordance 

with’’ statement in paragraph (g) of the 

proposed AD be replaced by ‘‘refer to’’ 

Airbus Alert Operators Transmission 

(AOT) A29L010–19, Revision 01, dated 

February 18, 2020, paragraphs 

4.4.2.1.(8), 4.4.2.1.(10), 4.4.2.2.(9) and 

4.4.2.2.(11). Delta stated that the EASA 

AD mandates accomplishment of the 

referenced AOT, and the AOT includes 

the following note: ‘‘NOTE 2: The 

accomplishment instructions of this 

AOT include procedures given in other 

documents or in other sections of the 

AOT. When the words ’refer to’ are used 

and the operator has a procedure 

accepted by the local authority he 

belongs to, the accepted alternative 

procedure can be used. When the words 

‘in accordance with’ are used then the 

given procedure must be followed.’’ 

Delta added that paragraphs 4.4.2.1.(8) 

and 4.4.2.2.(9) of the AOT use both 

‘‘refer to’’ and ‘‘in accordance with,’’ 

and paragraphs 4.4.2.1.(10) and 

4.4.2.2.(11) of the AOT use ‘‘in 

accordance with’’ when referencing the 

Airplane Maintenance Manual (AMM) 

wirelocking procedures. Delta further 

noted that in all cases, the AOT refers 

to standard AMM procedures, testing 

and wirelocking. As standard 

procedures, Delta recommended that the 

‘‘in accordance with’’ statement be 

replaced by ‘‘refer to’’ for paragraphs 

4.4.2.1.(8), 4.4.2.1.(10), 4.4.2.2.(9) and 

4.4.2.2.(11) of the AOT. 

The FAA agrees with the commenter’s 

request for further clarification. It 

should be clear to operators whether 

specific procedures are mandatory. 

Paragraph (h)(3) of the proposed AD 

specified compliance with ‘‘paragraph 

4.4.2., Accomplishment Instructions, of 

the AOT’’ only. This means that these 

actions must be completed in 

accordance with certain procedures 

specified in the Airbus AMM tasks 

defined in Airbus AOT A29L010–19, 

Revision 01, dated February 18, 2020. 

The FAA has clarified paragraph (h)(3) 

of this AD as follows: ‘‘Where EASA AD 

2020–0093 specifies to comply with 

‘‘the instructions of the AOT,’’ and ‘‘the 

AOT’’ specifies that ‘‘the 

accomplishment instructions marked as 

Required for Compliance (RC) must be 

done’’ this AD requires compliance with 

‘‘paragraph 4.4.2., Accomplishment 

Instructions, of the AOT [Airbus Alert 

Operators Transmission A29L010–19, 

Revision 01, dated February 18, 2020] 

only; except paragraphs 4.4.2.1(1) and 

4.4.2.2(1) which specify gaining access 

to the ground service manifold and 

preparation for update and may be 

accomplished in accordance with the 

operator’s maintenance or inspection 

program.’’ 

Conclusion 

The FAA reviewed the relevant data, 

considered the comments received, and 

determined that air safety and the 

public interest require adopting this AD 

with the change described previously, 

and minor editorial changes. The FAA 

has determined that these minor 

changes: 

• Are consistent with the intent that 

was proposed in the NPRM for 

addressing the unsafe condition; and 

• Do not add any additional burden 

upon the public than was already 

proposed in the NPRM. 

The FAA also determined that this 

change will not increase the economic 

burden on any operator or increase the 

scope of this AD. 

Related Service Information Under 1 

CFR Part 51 

EASA AD 2020–0093 describes 

procedures for replacement of the 

hydraulic system GSM manual valve 

attachment screws. For GSMs with part 

number (P/N) 70902–3 or P/N 70902–4 

installed with screws having P/N 

NAS1101–3H8, EASA AD 2020–0093 

describes procedures for repetitive 

replacement of those screws with new 

screws having P/N NAS1101–3H8. For 

GSMs with P/N 70902–5 installed with 

screws having P/N NAS1101–3H8, 

EASA AD 2020–0093 describes 

procedures for replacement of those 

screws with new bolts having P/N 

EWB0420D–3H–3 or four new screws 

having P/N NAS1101–3H8; if new 

screws are installed, EASA AD 2020– 

0093 describes procedures for replacing 

them with new bolts having P/N 

EWB0420D–3H–3 before the screws 

exceed 10,000 flight cycles since 

installation on an airplane. EASA AD 

2020–0093 also describes an optional 

terminating modification (replacement 

of all affected GSMs), which would 

terminate the repetitive replacements of 

the attachment screws. 

Airbus AOT A29L010–19, Revision 

01, dated February 18, 2020, describes 

procedures for initial and repetitive 

replacement of certain GSM manualvalve screws and a one-time visual 

inspection to determine if certain GSM 

manual-valve screws are installed 

instead of the correct bolts. 

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. 

Costs of Compliance 

The FAA estimates that this AD 

affects 107 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD: 

Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 10769 

ESTIMATED COSTS FOR REQUIRED ACTIONS

Labor cost Parts cost Cost per product Cost on U.S. 

operators 

7 work-hours × $85 per hour = $595 per cycle ............................................................ * $0 $595 per cycle ...... $63,665 per cycle. 

* The FAA has received no definitive data that would enable the agency to provide parts cost estimates for the required actions specified in 

this AD. 

ESTIMATED COSTS FOR OPTIONAL ACTIONS

Labor cost Parts cost Cost per 

product 

10 work-hours × $85 per hour = $850 .................................................................................................................... * $0 $850 

* The FAA has received no definitive data that would enable the agency to provide parts cost estimates for the optional actions specified in this 

AD. 

According to the manufacturer, some 

or all of the costs of this AD may be 

covered under warranty, thereby 

reducing the cost impact on affected 

individuals. The FAA does not control 

warranty coverage for affected 

individuals. As a result, the FAA has 

included all known costs in the cost 

estimate. 

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 

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) Will not affect intrastate aviation 

in Alaska, and 

(3) Will not have a significant 

economic impact, positive or negative, 

on a substantial number of small entities 

under the criteria of the Regulatory 

Flexibility Act. 

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: 

2021–01–06 Airbus SAS: Amendment 39– 

21382; Docket No. FAA–2020–0674; 

Product Identifier 2020–NM–070–AD. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective March 30, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Airbus SAS airplanes 

specified in paragraphs (c)(1) through (4) of 

this AD, certificated in any category, as 

identified in European Union Aviation Safety 

Agency (EASA) AD 2020–0093, dated April 

24, 2020 (EASA AD 2020–0093). 

(1) Model A330–201, –202, –203, –223, and 

–243 airplanes. 

(2) Model A330–301, –302, –303, –321, 

–322, –323, –341, –342, and –343 airplanes. 

(3) Model A340–211, –212, and –213 

airplanes. 

(4) Model A340–311, –312, and –313 

airplanes. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 29, Hydraulic power. 

(e) Reason 

This AD was prompted by reports of 

hydraulic system failure due to fatigue failure 

of the screws attaching the manual valve to 

the ground service manifold (GSM). The FAA 

is issuing this AD to address the failure of 

hydraulic system manual valve attachment 

screws. This condition, if not addressed, 

could lead to the loss of one or more 

hydraulic systems and damage to 

surrounding structure and components, 

possibly resulting in reduced control of the 

airplane, or injury to maintenance staff 

working in the main landing gear bay. 

(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, EASA AD 2020–0093. 

(h) Exceptions to EASA AD 2020–0093 

(1) Where EASA AD 2020–0093 refers to its 

effective date or to ‘‘the effective date of 

EASA AD 2019–0314,’’ this AD requires 

using the effective date of this AD. 

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

2020–0093 does not apply to this AD. 

(3) Where EASA AD 2020–0093 specifies 

to comply with ‘‘the instructions of the AOT 

[Alert Operators Transmission],’’ and ‘‘the 

AOT’’ specifies that ‘‘the accomplishment 

instructions marked as Required for 

Compliance (RC) must be done,’’ this AD 

requires compliance with ‘‘paragraph 4.4.2., 

Accomplishment Instructions, of the AOT 

[Airbus Alert Operators Transmission 

A29L010–19, Revision 01, dated February 18, 

2020]’’ only; except paragraphs 4.4.2.1(1) and 

4.4.2.2(1), which specify gaining access to the 

ground service manifold and preparation for 

update, may be accomplished in accordance 

with the operator’s maintenance or 

inspection program. 

10770 Federal Register / Vol. 86, No. 34 / Tuesday, February 23, 2021 / Rules and Regulations 

(i) No Reporting Requirement 

Although the service information 

referenced in EASA AD 2020–0093 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 local Flight Standards 

District 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-ANM-116- 

AMOC-REQUESTS@faa.gov. 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. 

(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). If approved by 

the DOA, the approval must include the 

DOA-authorized signature. 

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

service information referenced in EASA AD 

2020–0093 that contains RC procedures and 

tests: Except as required by paragraphs (h)(3) 

and (j)(2) of this AD, RC procedures and tests 

must be done to comply with this AD; any 

procedures or tests that are not identified as 

RC are recommended. Those procedures and 

tests that are 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 

procedures and tests identified as RC can be 

done and the airplane can be put back in an 

airworthy condition. Any substitutions or 

changes to procedures or tests 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 

(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 2020–0093, dated April 24, 2020. 

(ii) Airbus Alert Operators Transmission 

A29L010–19, Revision 01, dated February 18, 

2020. 

(3) For EASA AD 2020–0093, contact the 

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) For Airbus service information 

identified in this AD, contact Airbus SAS, 

Airworthiness Office—EAL, Rond-Point 

Emile Dewoitine No: 2, 31700 Blagnac Cedex, 

France; telephone +33 5 61 93 36 96; fax +33 

5 61 93 45 80; email airworthiness.A330- 

A340@airbus.com; internet http://

www.airbus.com. 

(5) 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 on the internet at https:// 

www.regulations.gov by searching for and 

locating Docket No. FAA–2020–0674. 

(6) 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 December 30, 2020. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–03566 Filed 2–22–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0830; Project 

Identifier 2020–CE–002–AD; Amendment 

39–21428; AD 2021–04–07] 

RIN 2120–AA64 

Airworthiness Directives; Piper 

Aircraft, Inc. Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for all 

Piper Aircraft, Inc., (Piper) Models PA– 

46–350P (Malibu Mirage), PA–46R– 

350T (Malibu Matrix), and PA–46– 

500TP (Malibu Meridian) airplanes. 

This AD was prompted by a finding of 

several airplanes with wing assemblies 

that did not have the proper stall 

warning heater modification design. 

Without the proper stall warning heat 

control modification kit installed, 

during flights into icing conditions with 

the landing gear down, ice can form on 

the stall vane, which may result in 

failure of the stall warning system. This 

AD requires identifying and correcting 

nonconforming stall warning heat 

control systems. The FAA is issuing this 

AD to address the unsafe condition on 

these products. 

DATES: This AD is effective March 30, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of March 30, 2021. 

ADDRESSES: For service information 

identified in this final rule, contact 

Piper Aircraft Inc., 2926 Piper Drive, 

Vero Beach, FL 32960; phone: 772–299– 

2686; email: customerservice@

piper.com; website: https://

www.piper.com/. You may view this 

service information at the FAA, 

Airworthiness Products Section, 

Operational Safety Branch, 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 at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

0830. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–0830; 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: John 

Lee, Aviation Safety Engineer, Atlanta 

ACO Branch, FAA, 1701 Columbia 

Avenue, College Park, GA 30337; phone: 

(404) 474–5568; email: john.lee@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to all Piper Models PA–46–350P 

(Malibu Mirage), PA–46R–350T (Malibu 

Matrix), and PA–46–500TP (Malibu 

Meridian) airplanes. The NPRM 

published in the Federal Register on 

October 28, 2020 (85 FR 68255). The 

NPRM was prompted by the finding of