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

84199 

Vol. 85, No. 248 

Monday, December 28, 2020 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0796; Project 

Identifier MCAI–2020–00902–T; Amendment 

39–21367; AD 2020–26–12] 

RIN 2120–AA64 

Airworthiness Directives; Gulfstream 

Aerospace LP 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 

Gulfstream Aerospace LP Model 

Gulfstream G280 airplanes. This AD was 

prompted by a determination that new 

or more restrictive airworthiness 

limitations are necessary. This AD 

requires revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations, as 

specified in a Civil Aviation Authority 

of Israel (CAAI) 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 February 1, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of February 1, 2021. 

ADDRESSES: For material incorporated 

by reference (IBR) in this AD, The Civil 

Aviation Authority of Israel (CAAI), 

P.O. Box 1101, Golan Street, Airport 

City, 70100, Israel; phone: 972–3– 

9774665; fax: 972–3–9774592; email: 

aip@mot.gov.il. You may find this IBR 

material on the CAAI website at https:// 

www.caa.gov.il. 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– 

0796. 

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– 

0796; 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: Tom 

Rodriguez, Aerospace Engineer, Large 

Aircraft Section, International 

Validation Branch, FAA, 2200 South 

216th St., Des Moines, WA 98198; 

phone and fax: 206–231–3226; email: 

tom.rodriguez@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

The CAAI, which is the aviation 

authority for Israel, has issued CAAI AD 

ISR–I–04–2020–06–02, dated June 28, 

2020 (CAAI AD ISR–I–04–2020–06–02) 

(also referred to as the Mandatory 

Continuing Airworthiness Information, 

or the MCAI), to correct an unsafe 

condition for all Gulfstream Aerospace 

LP Model Gulfstream G280 airplanes. 

Airplanes with an original airworthiness 

certificate or original export certificate 

of airworthiness issued after September 

15, 2019, must comply with the 

airworthiness limitations specified as 

part of the approved type design and 

referenced on the type certificate data 

sheet; this AD therefore does not 

include those airplanes in the 

applicability. 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to certain Gulfstream Aerospace 

LP Model Gulfstream G280 airplanes. 

The NPRM published in the Federal 

Register on September 16, 2020 (85 

FR57799). The NPRM was prompted by 

a determination that new or more 

restrictive airworthiness limitations are 

necessary. The NPRM proposed to 

require revising the existing 

maintenance or inspection program, as 

applicable, to incorporate new or more 

restrictive airworthiness limitations, as 

specified in CAAI AD ISR–I–04–2020– 

06–02. 

The FAA is issuing this AD to address 

solder cracking of the flight control 

electronic control units (FCECUs), 

which, combined with latent failure of 

the horizontal stabilizer trim actuator 

(HSTA) ‘‘no-back’’ mechanism, could 

result in uncontrolled HSTA operation. 

See the MCAI for additional background 

information. 

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, except for 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. 

Related Service Information Under 1 

CFR Part 51 

CAAI AD ISR–I–04–2020–06–02 

describes new or more restrictive 

airworthiness limitations for airplane 

structures and safe life limits. 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 160 airplanes of U.S. registry. 

The FAA estimates the following costs 

to comply with this AD: 

The FAA has determined that revising 

the existing maintenance or inspection 

program takes an average of 90 workhours per operator, although the agency 

recognizes that this number may vary 

from operator to operator. In the past, 

the agency has estimated that this action 


tkelley on DSKBCP9HB2PROD with RULES
84200 Federal Register / Vol. 85, No. 248 / Monday, December 28, 2020 / Rules and Regulations 

takes 1 work-hour per airplane. Since 

operators incorporate maintenance or 

inspection program changes for their 

affected fleet(s), the FAA has 

determined that a per-operator estimate 

is more accurate than a per-airplane 

estimate. Therefore, the agency 

estimates the average total cost per 

operator to be $7,650 (90 work-hours × 

$85 per work-hour). 

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: 

2020–26–12 Gulfstream Aerospace LP: 

Amendment 39–21367; Docket No. 

FAA–2020–0796; Project Identifier 

MCAI–2020–00902–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective February 1, 2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Gulfstream 

Aerospace LP Model Gulfstream G280 

airplanes, certificated in any category, with 

an original airworthiness certificate or 

original export certificate of airworthiness 

issued on or before September 15, 2019. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 27, Flight controls. 

(e) Reason 

This AD was prompted by a determination 

that new or more restrictive airworthiness 

limitations are necessary. The FAA is issuing 

this AD to address solder cracking of the 

flight control electronic control units 

(FCECUs), which, combined with latent 

failure of the horizontal stabilizer trim 

actuator (HSTA) ‘‘no-back’’ mechanism, 

could result in uncontrolled HSTA operation. 

(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, Civil Aviation Authority of 

Israel (CAAI) AD ISR–I–04–2020–06–02, 

dated June 28, 2020 (CAAI AD ISR–I–04– 

2020–06–02). 

(h) Exceptions to CAAI AD ISR–I–04–2020– 

06–02 

(1) Where CAAI AD ISR–I–04–2020–06–02 

refers to its effective date, this AD requires 

using the effective date of this AD. 

(2) Where CAAI AD ISR–I–04–2020–06–02 

refers to the date of its issuance, this AD 

requires using the effective date of this AD. 

(i) Provisions for Alternative Actions, 

Intervals, and Critical Design Configuration 

Control Limitations (CDCCLs) 

After the existing maintenance or 

inspection program has been revised as 

required by paragraph (g) of this AD, no 

alternative actions (e.g., inspections), 

intervals, and CDCCLs are allowed unless 

they are approved as specified in the 

provisions of CAAI AD ISR–I–04–2020–06– 

02. 

(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 

CAAI; or CAAI’s authorized Designee. If 

approved by the CAAI Designee, the approval 

must include the Designee’s authorized 

signature. 

(k) Related Information 

For more information about this AD, 

contact Tom Rodriguez, Aerospace Engineer, 

Large Aircraft Section, International 

Validation Branch, FAA, 2200 South 216th 

St., Des Moines, WA 98198; phone and fax: 

206–231–3226; email: tom.rodriguez@

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) The Civil Aviation Authority of Israel 

(CAAI) AD ISR–I–04–2020–06–02, dated June 

28, 2020. 

(ii) [Reserved] 

(3) For CAAI AD ISR–I–04–2020–06–02, 

contact the CAAI, P.O. Box 1101, Golan 

Street, Airport City, 70100, Israel; phone: 

972–3–9774665; fax: 972–3–9774592; email: 

aip@mot.gov.il. You may find this IBR 

material on the CAAI website at https://

www.caa.gov.il. 

(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 on the internet at https:// 

www.regulations.gov by searching for and 

locating Docket No. FAA–2020–0796. 


tkelley on DSKBCP9HB2PROD with RULES
Federal Register / Vol. 85, No. 248 / Monday, December 28, 2020 / Rules and Regulations 84201 

(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 December 10, 2020. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2020–28406 Filed 12–23–20; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0792; Project 

Identifier 2018–SW–049–AD; Amendment 

39–21368; AD 2020–26–13] 

RIN 2120–AA64 

Airworthiness Directives; Sikorsky 

Aircraft Corporation Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for 

Sikorsky Aircraft Corporation (Sikorsky) 

Model S–92A helicopters. This AD was 

prompted by seven incidents of fatigue 

cracks in the horizontal stabilizer root 

fitting FWD (forward root fitting). This 

AD requires establishing the life limit of 

certain part-numbered forward root 

fittings, establishing the life limit of 

certain part-numbered stabilizer strut 

fittings, repetitively inspecting certain 

parts, and depending on the inspection 

results, removing parts from service. 

The FAA is issuing this AD to address 

the unsafe condition on these products. 

DATES: This AD is effective February 1, 

2021. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of February 1, 2021. 

ADDRESSES: For service information 

identified in this final rule, contact your 

local Sikorsky Field Representative or 

Sikorsky’s Service Engineering Group at 

Sikorsky Aircraft Corporation, 124 

Quarry Road, Trumbull, CT 06611; 

telephone 1–800–946–4337 (1–800– 

Winged–S); email wcs_cust_service_

eng.gr-sik@lmco.com. Operators may 

also log on to the Sikorsky 360 website 

at https://www.sikorsky360.com. 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. It is also available 

on the internet at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

0792. 

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– 

0792; 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: 

Dorie Resnik, Aerospace Engineer, 

Boston ACO Branch, 1200 District 

Avenue, Burlington, Massachusetts 

01803; telephone 781–238–7693; email 

dorie.resnik@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to Sikorsky Model S–92A 

helicopters with certain part-numbered 

horizontal stabilizer assemblies 

(stabilizer assembly), certain partnumbered forward root fittings, or 

certain part-numbered stabilizer strut 

fittings installed. The NPRM published 

in the Federal Register on September 

17, 2020 (85 FR 58007). The NPRM was 

prompted by seven incidents of fatigue 

cracks in forward root fittings. Fatigue 

cracking in a forward root fitting 

degrades the load path and increases the 

load on other assembly parts, 

particularly at the aft horizontal 

stabilizer attachment points. 

The NPRM proposed to require 

establishing the life limit of certain partnumbered forward root fittings and 

certain part-numbered stabilizer strut 

fittings. The NPRM also proposed to 

require repetitively inspecting each 

stabilizer assembly attachment bolt and 

barrel nut set, each forward root fitting, 

each attachment fitting including the 

bolt holes and fastener holes, condition 

of the fasteners, and each attachment 

fitting mating surface. Depending on the 

inspection results, the NPRM proposed 

to require removing parts from service. 

Finally, the NPRM proposed to prohibit 

installing certain stabilizer assemblies 

on any helicopter. The FAA is issuing 

this AD to address the unsafe condition 

on these products. 

Comments 

The FAA gave the public the 

opportunity to participate in developing 

this final rule, but the FAA did not 

receive any 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 

The FAA reviewed S–92 Maintenance 

Manual, SA S92A–AMM–000, 

Temporary Revision (TR) 55–33, dated 

March 24, 2020 (TR 55–33), which adds 

additional part numbers (P/Ns) to the 

Horizontal Stabilizer—Maintenance 

Practices and specifies procedures for 

inspecting each forward root fitting and 

aft root fitting bolt holes and fasteners, 

each forward and aft root fitting mating 

surface for wear of the abrasion-resistant 

Teflon coating, procedures for 

chemically striping the abrasionresistant Teflon coating from the entire 

mounting pad, applying alodine, and 

applying an abrasion-resistant Teflon 

coating. This service information also 

describes procedures for removing and 

installing a stabilizer (Tasks 55–11–01– 

900–001 and 55–11–01–900–002), 

checking the torque stabilization (Task 

55–11–01–280–001), and inspecting the 

stabilizer and attaching hardware (Task 

55–11–01–210–004). This service 

information also provides assembly 

diagrams and lists interchangeable 

stabilizer P/Ns and compatible strut P/ 

Ns. 

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. 

Other Related Service Information 

The FAA also reviewed S–92 

Maintenance Manual SA S92A–AWL– 

000, TR No. 4–58, dated October 2, 2017 

(TR 4–58), and S–92 Maintenance 

Manual SA S92A–AWL–000, TR No. 4– 

66 dated November 20, 2019 (TR 4–66). 

This service information revises Task 4– 

00–00–200–000, Table 1 Replacement 

Schedule, dated November 30, 2015. 

Both TR 4–58 and 4–66 revise the 

Airworthiness Limitations Schedule by 

removing certain part-numbered 

components, introducing new partVerDate Sep<11>2014 16:58 Dec 26, 2020 Jkt 253001 PO 00000 Frm 00003 Fmt 4700 Sfmt 4700 E:\FR\FM\28DER1.SGM 28DER1

tkelley on DSKBCP9HB2PROD with RULES