Federal Register / Vol. 86, No. 110 / Thursday, June 10, 2021 / Rules and Regulations 30759 

Spar Caps Replacement, dated June 9, 2012 

(Piper Kit 764–394), as applicable. 

Note 2 to paragraphs (h)(3): This note 

applies to paragraphs (h)(3) and (7) of this 

AD. Replacement parts for the left and right 

wing spar fittings P/N 97712–00 and the 

right, left, top, and bottom spar assemblies P/ 

Ns 97701–00 and 97701–01 are included 

with Piper Kit 764–393 and Piper Kit 764– 

394. 

(4) Remove from service spar carry through 

assembly P/N 97370–00 or 76824–02, as 

applicable, and replace with an unused (zero 

hours TIS) spar carry through assembly P/N 

76824–02. 

(5) Remove from service spar assembly P/ 

Ns 97701–00 and 97701–01, Revision P or 

later revision, and replace with an unused 

(zero hours TIS) spar assembly by following 

the Instructions, sections B. and C., in Piper 

Kit 764–393 or Piper Kit 764–394, as 

applicable. 

(6) Remove from service any spar carry 

through assembly P/N 76767–00 or P/N 

76824–02 and replace with an unused (zero 

hours TIS) spar carry through assembly P/N 

76824–02. 

(7) Remove from service spar assemblies P/ 

Ns 97701–00 and 97701–01, Revision N or 

earlier revision, and replace with an unused 

(zero hours TIS) left spar cap replacement kit 

P/N 764–393 and right spar cap replacement 

kit P/N 764–394 by following the 

Instructions, sections B. and C., in Piper Kit 

764–393 or Piper Kit 764–394, as applicable. 

(8) Remove from service wing attachment 

lower bolt P/N 77245–00 and replace with an 

unused (zero hours TIS) P/N 77245–00 bolt. 

(i) Credit for Previous Actions 

You may take credit for the actions 

required by paragraph (g) of this AD if you 

performed those actions before the effective 

date of this AD using Piper Aircraft 

Corporation Service Bulletin No. 552, dated 

February 3, 1978. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, Atlanta 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 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. 

(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) AMOCs approved for AD 79–01–03 and 

AD 83–20–03 are approved as AMOCs for the 

corresponding provisions of this AD. 

(k) Related Information 

For more information about this AD, 

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. 

(l) Material Incorporated by Reference 

(1) The Director of the Federal Register 

approved the incorporation by reference 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 the AD specifies otherwise. 

(i) Piper Service Bulletin No. 552A, dated 

August 3, 2018; 

(ii) Piper Aircraft PA–36, Pawnee Brave Kit 

764–394, Right Wing Main Spar Caps 

Replacement, dated June 9, 2012; and 

Note 3 to paragraph (l)(2)(ii): The Kit List 

and Sketch A for Piper Aircraft PA–36, 

Pawnee Brave Kit 764–394, Right Wing Main 

Spar Caps Replacement, dated June 9, 2012; 

and Piper Aircraft PA–36, Pawnee Brave Kit 

764–393, Left Wing Main Spar Caps 

Replacement, dated June 9, 2012, were 

revised and dated June 9, 2012. The 

instructions and sketches in the rest of the 

documents were reformatted but retain the 

previous date of March 30, 1982, because the 

content of those pages was unchanged. 

(iii) Piper Aircraft PA–36, Pawnee Brave 

Kit 764–393, Left Wing Main Spar Caps 

Replacement, dated June 9, 2012. 

(3) For service information identified in 

this AD, contact Piper Aircraft, Inc., 2926 

Piper Drive, Vero Beach, FL 32960; phone: 

(772) 567–4361; website: www.piper.com. 

(4) You may view this service information 

at FAA, Policy and Innovation Division, 901 

Locust, Kansas City, MO 64106. For 

information on the availability of this 

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

(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/ 

ibr-locations.html. 

Issued on May 19, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–12043 Filed 6–9–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–1183; Project 

Identifier 2019–SW–008–AD; Amendment 

39–21565; AD 2021–11–03] 

RIN 2120–AA64 

Airworthiness Directives; Airbus 

Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Airbus Helicopters Model EC 155B, 

EC155B1, SA–365N, SA–365N1, AS– 

365N2, and AS 365 N3 helicopters, as 

identified in a European Aviation Safety 

Agency (now European Union Aviation 

Safety Agency) (EASA) AD. This AD 

was prompted by a report of an in-flight 

loss of engine and main gearbox (MGB) 

cowlings. This AD requires inspecting 

the MGB fixed cowling front fitting 

(MGB front fitting), and depending on 

findings, corrective action. This AD also 

requires a new modification, which is a 

terminating action for the inspection, as 

specified in an 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 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 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 

material on the EASA website at https:// 

ad.easa.europa.eu. For Airbus 

Helicopters service information, contact 

Airbus Helicopters, 2701 N Forum 

Drive, Grand Prairie, TX 75052; 

telephone (972) 641–0000 or (800) 232– 

0323; fax (972) 641–3775; or at https:// 

www.airbus.com/helicopters/services/ 

technical-support.html. You may view 

this material at the FAA, Office of the 

Regional Counsel, Southwest Region, 

10101 Hillwood Pkwy., Room 6N–321, 

Fort Worth, TX 76177. For information 

on the availability of this material at the 

FAA, call (817) 222–5110. It is also 

available in the AD docket on the 

internet at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2020–1183. 

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– 

1183; 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. 


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30760 Federal Register / Vol. 86, No. 110 / Thursday, June 10, 2021 / Rules and Regulations 

FOR FURTHER INFORMATION CONTACT: 

Blaine Williams, Aerospace Engineer, 

Los Angeles ACO Branch, Compliance & 

Airworthiness Division, 3960 

Paramount Blvd., Lakewood, California 

90712; telephone (562) 627–5371; email 

blaine.williams@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2019–0008, 

dated January 22, 2019 (EASA AD 

2019–0008) to correct an unsafe 

condition for certain Airbus Helicopters 

(AH), formerly Eurocopter, Eurocopter 

France, Aerospatiale, Model EC 155 B, 

EC 155 B1, SA 365 N, SA 365 N1, AS 

365 N2, and AS 365 N3 helicopters. 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to certain Model EC 155 B, 

EC155B1, SA–365N, SA–365N1, AS– 

365N2, and AS 365 N3 helicopters. The 

NPRM published in the Federal 

Register on March 5, 2021 (86 FR 

12862). The NPRM was prompted by 

reports of an in-flight loss of engine and 

MGB cowlings. Subsequent 

investigations revealed that the MGB 

cowling attachment fittings failed 

because of mounting stress in the MGB 

front fitting and air intake bulkhead. 

The NPRM proposed to require 

inspecting and if necessary, replacing 

the MGB front fitting. The NPRM also 

proposed to require modifying the MGB 

front fitting, as specified in an EASA 

AD. 

The FAA is issuing this AD to address 

failure of an MGB front fitting and 

subsequent detachment of the MGB or 

engine cowlings. See EASA AD 2019– 

0008 for additional background 

information. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA gave the public the 

opportunity to participate in developing 

this final rule. The FAA received no 

comments on the NPRM or on the 

determination of the cost to the public. 

Conclusion 

The FAA reviewed the relevant data 

and determined that air safety and the 

public interest require adopting this 

final rule as proposed. 

Related Service Information Under 1 

CFR Part 51 

EASA AD 2019–0008 requires 

inspecting the MGB front fittings within 

110 flight hours after April 14, 2017 (the 

effective date of EASA AD 2017–0055, 

dated March 31, 2017). If there is a 

discrepancy, the EASA AD requires 

applicable corrective action(s) before 

next flight. EASA AD 2019–0008 also 

requires modification of the MGB fixed 

cowling attachments within 660 flight 

hours or 23 months, whichever occurs 

first, after the effective date described in 

EASA AD 2019–0008. Accomplishing 

the modification constitutes a 

terminating action for the required 

inspection. 

The FAA also reviewed Airbus 

Helicopters Alert Service Bulletin ASB 

No. AS365–53.00.62 and ASB No. 

EC155–53A038, each Revision 0 and 

dated December 20, 2018 (ASB AS365– 

53.00.62 and ASB EC155–53A038). ASB 

AS365–53.00.62 applies to Model 

AS365-series helicopters. ASB EC155– 

53A038 applies to Model EC155-series 

helicopters. This service information 

specifies replacing the front bracket, 

inspecting for stress of the MGB fixed 

cowlings on the radiator bulkhead, and 

installing an additional locking system. 

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 19 helicopters of U.S. Registry. 

Labor rates are estimated at $85 per 

work-hour. Based on these numbers, the 

FAA estimates that operators may incur 

the following costs in order to comply 

with this AD. 

Inspecting the MGB front fittings 

takes about 2 work-hours for an 

estimated cost of $170 per helicopter 

and $3,230 for the U.S. fleet. If required, 

replacing an MGB front fitting takes 

about 2 work-hours and parts cost about 

$590 for an estimated total cost of $760 

per fitting. Other repairs will take up to 

8 work-hours (excluding drying time) 

and parts will cost a minimal amount 

for an estimated cost of up to $680 per 

helicopter. 

Modifying the MGB fixed cowling 

attachments takes about 5 work-hours 

and parts cost about $630 for an 

estimated cost of $1,055 per helicopter 

and $20,045 for the U.S. fleet. 

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. 

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: 

2021–11–03 Airbus Helicopters: 

Amendment 39–21565; Docket No. 

FAA–2020–1183; Project Identifier 

2019–SW–008–AD. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective July 15, 2021. 


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Federal Register / Vol. 86, No. 110 / Thursday, June 10, 2021 / Rules and Regulations 30761 

(b) Affected Airworthiness Directives (ADs) 

None. 

(c) Applicability 

This AD applies to Airbus Helicopters 

Model EC 155B, EC155B1, SA–365N, SA– 

365N1, AS–365N2, and AS 365 N3 

helicopters, certificated in any category, as 

identified in European Aviation Safety 

Agency (now European Union Aviation 

Safety Agency) (EASA) AD 2019–0008, dated 

January 22, 2019 (EASA AD 2019–0008). 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code: 7110, Engine Cowling System. 

(e) Reason 

This AD was prompted by a report of an 

in-flight loss of main gearbox (MGB) and 

engine cowlings. The FAA is issuing this AD 

to address a failure of the MGB fixed cowling 

front fitting, and subsequent MGB cowling or 

engine cowling detachment, which could 

result in damage to the helicopter, loss of 

helicopter control, and possible injury to 

persons on the ground. 

(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 2019–0008. 

(h) Exceptions to EASA AD 2019–0008 

(1) Where EASA AD 2019–0008 refers to 

April 14, 2017 (the effective date of EASA 

AD 2017–0055, dated March 31, 2017), this 

AD requires using the effective date of this 

AD. 

(2) Where EASA AD 2019–0008 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(3) Where EASA AD 2019–0008 refers to 

flight hours (FH), this AD requires using 

hours time-in-service. 

(4) Where EASA AD 2019–0008 requires 

the modification within 660 flight hours or 

23 months, whichever occurs first, this AD 

requires the modification within 660 hours 

time-in-service instead. 

(5) Although the service information 

referenced in EASA AD 2019–0008 specifies 

to discard certain parts, this AD requires 

removing those parts from service instead. 

(6) Where the service information 

referenced in EASA AD 2019–0008 specifies 

to use tooling, equivalent tooling may be 

used. 

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

2019–0008 does not apply to this AD. 

(8) Where paragraph (1) of EASA AD 2019– 

0008 states to, ‘‘inspect the MGB fixed 

cowling front fittings in accordance with the 

instructions of paragraph 1.E.2 of the 

applicable inspection ASB or in accordance 

with the instructions of the applicable 

modification ASB,’’ this AD requires 

determining if Airbus Helicopters Alert 

Service Bulletin No. 53.00.55, Revision 0, 

dated March 13, 2017, or Revision 1, dated 

December 20, 2018, has or has not been 

complied with and following the 

instructions, ‘‘For helicopters on which 

ALERT SERVICE BULLETIN No. 53.00.55 

has not been complied with’’ or ‘‘For 

helicopters on which ALERT SERVICE 

BULLETIN No. 53.00.55 has been complied 

with,’’ as applicable, in paragraph 1.E.2, of 

Airbus Helicopters Alert Service Bulletin 

ASB No. AS365–53.00.62 or ASB No. EC155– 

53A038, each Revision 0 and dated December 

20, 2018 (ASB AS365–53.00.62 or ASB 

EC155–53A038), as applicable to your model 

helicopter. 

(9) Where paragraph (2) of EASA AD 2019– 

0008 states to, ‘‘accomplish the applicable 

corrective action(s) in accordance with 

paragraph 1.E.2 of the applicable inspection 

ASB or in accordance with the instructions 

of the applicable modification ASB,’’ this AD 

requires accomplishing the applicable 

corrective actions by following ASB AS365– 

53.00.62 or ASB EC155–53A038, as 

applicable to your model helicopter. 

(10) Where paragraph 3.B.2.e.3 of the 

applicable modification ASB referenced in 

EASA AD 2019–0008 refers to paragraph 

3.B.e.3, this AD requires referring to 

paragraph 3.B.3 of ASB AS365–53.00.62 or 

ASB EC155–53A038, as applicable to your 

model helicopter. 

(i) Special Flight Permit 

Special flight permits, as described in 14 

CFR 21.197 and 21.199, are not allowed. 

(j) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, 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 manager of the 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. 

(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. 

(k) Related Information 

For more information about this AD, 

contact Blaine Williams, Aerospace Engineer, 

Los Angeles ACO Branch, Compliance & 

Airworthiness Division, 3960 Paramount 

Blvd., Lakewood, California 90712; telephone 

(562) 627–5227; email blaine.williams@

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 Aviation Safety Agency 

(EASA) AD 2019–0008, dated January 22, 

2019. 

(ii) Airbus Helicopters Alert Service 

Bulletin ASB No. AS365–53.00.62, Revision 

0, dated December 20, 2018. 

(iii) Airbus Helicopters Alert Service 

Bulletin ASB No. EC155–53A038, Revision 0, 

dated December 20, 2018. 

(3) For EASA AD 2019–0008, 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. For Airbus Helicopters 

service information, contact Airbus 

Helicopters, 2701 N Forum Drive, Grand 

Prairie, TX 75052; telephone (972) 641–0000 

or (800) 232–0323; fax (972) 641–3775; or at 

https://www.airbus.com/helicopters/services/ 

technical-support.html. 

(4) You may view this service information 

at the FAA, Office of the Regional Counsel, 

Southwest Region, 10101 Hillwood Pkwy., 

Room 6N–321, Fort Worth, TX 76177. For 

information on the availability of this 

material at the FAA, call (817) 222–5110. 

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–2020–1183. 

(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 May 11, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–12037 Filed 6–9–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–1074; Project 

Identifier MCAI–2020–01257–A; Amendment 

39–21574; AD 2021–11–12] 

RIN 2120–AA64 

Airworthiness Directives; Pilatus 

Aircraft Ltd. Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Pilatus Aircraft Ltd. (Pilatus) Model PC– 

24 airplanes. This 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 the 

engine attachment hardware not 


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