3028 Federal Register / Vol. 87, No. 13 / Thursday, January 20, 2022 / Rules and Regulations 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0881; Project 

Identifier AD–2020–01062–T; Amendment 

39–21912; AD 2022–02–15] 

RIN 2120–AA64 

Airworthiness Directives; Gulfstream 

Aerospace Corporation Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is superseding 

Airworthiness Directive (AD) 2020–12– 

06 for all Gulfstream Aerospace 

Corporation (Gulfstream) Model G–IV 

airplanes. AD 2020–12–06 required 

replacing the nose wheel steering servo 

valve manifold, incorporating revised 

operating procedures into the airplane 

flight manual (AFM), doing a records 

inspection for any incidents of uncommanded nose wheel steering turns, 

and reporting the results to the FAA. 

Since the FAA issued AD 2020–12–16, 

the FAA determined that a 

typographical error was made in citing 

one of the AFM documents. This AD 

retains the actions of AD 2020–12–06 

and corrects the citation to the AFM. 

The FAA is issuing this AD to address 

the unsafe condition on these products. 

DATES: This AD is effective February 24, 

2022. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of July 20, 2020 (85 FR 36143, June 

15, 2020). 

ADDRESSES: For service information 

identified in this final rule, contact 

Gulfstream Aerospace Corporation, P.O. 

Box 2206, Savannah, GA 31402; phone: 

(800) 810–4853; email: pubs@

gulfstream.com; website: https://

www.gulfstream.com/en/customersupport/. You may view this service 

information at the FAA, Airworthiness 

Products Section, Operational Safety 

Branch, FAA, 901 Locust, Kansas City, 

MO 64106. For information on the 

availability of this material at the FAA, 

call (817) 222–5110. It is also available 

at https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0881. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0881; 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: 

Samuel Belete, Aviation Safety 

Engineer, Systems and Equipment 

Section, FAA, Atlanta ACO Branch, 

1701 Columbia Avenue, College Park, 

GA 30337; phone: (404) 474–5580; fax: 

(404) 474–5606; email: samuel.belete@

faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 to supersede AD 2020–12–06, 

Amendment 39–21141 (85 FR 36143, 

June 15, 2020) (AD 2020–12–06). AD 

2020–12–06 applied to all Gulfstream 

Model G–IV airplanes and required 

replacing the nose wheel steering servo 

valve manifold, incorporating revised 

operating procedures into the AFM, 

doing a records inspection for any 

incidents of un-commanded nose wheel 

steering turns, and reporting the results 

to the FAA. The FAA issued AD 2020– 

12–06 to prevent moisture from entering 

the nose steering wheel servo valve, 

which could freeze and cause an uncommanded nose wheel steering 

position during touchdown. 

The NPRM published in the Federal 

Register on October 26, 2021 (86 FR 

59062). The NPRM was prompted by a 

determination that a typographical error 

was made in citing the title of the AFM 

required by paragraph (g)(3) of AD 

2020–12–06. The paragraph incorrectly 

references the document number as 

‘‘FAC–AC–G400–OPS–0001’’ instead of 

‘‘GAC–AC–G400–OPS–0001.’’ In the 

NPRM, the FAA proposed to retain the 

actions of AD 2020–12–06 and to correct 

the citation to the AFM. 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 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 

This AD requires Gulfstream IV 

Customer Bulletin Number 244, dated 

March 12, 2018; Gulfstream G300 

Customer Bulletin 244, dated March 12, 

2018; Gulfstream G400 Customer 

Bulletin 244, dated March 12, 2018; 

Gulfstream IV Airplane Flight Manual, 

Gulfstream Aerospace Document 

Number GAC–AC–GIV–OPS–0001, 

Revision 52, dated October 30, 2017; 

Gulfstream G300 Airplane Flight 

Manual, Gulfstream Aerospace 

Document Number GAC–AC–G300– 

OPS–0001, Revision 20, dated October 

30, 2017; and Gulfstream G400 Airplane 

Flight Manual, Gulfstream Aerospace 

Document Number GAC–AC–G400– 

OPS–0001, Revision 20, dated October 

30, 2017; which the Director of the 

Federal Register approved for 

incorporation by reference as of July 20, 

2020 (85 FR 36143, June 15, 2020). 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. 

Differences Between This AD and the 

Service Information 

The Gulfstream customer bulletins 

require reporting compliance with the 

bulletins to Gulfstream. This AD does 

not contain that requirement; however, 

this AD requires reporting any known 

occurrences of un-commanded nose 

wheel steering turns to the FAA. 

The Gulfstream customer bulletins 

include a compliance time of 48 months 

beginning on March 12, 2018. The 

compliance time for this AD is 36 

months after July 20, 2020 (the effective 

date of AD 2020–12–06). 

Costs of Compliance 

The FAA estimates that this AD 

affects 425 airplanes of U.S. registry. 

The FAA estimates the following 

costs to comply with this AD: 


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Federal Register / Vol. 87, No. 13 / Thursday, January 20, 2022 / Rules and Regulations 3029 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

airplane 

Cost on U.S. 

operators 

Incorporate AFM revision ................. 1 work-hour × $85 per hour = $85 ............................... $0 $85 $36,125 

Replace nose wheel steering servo 

valve.

7 work-hours × $85 per hour = $595 ............................ 63,624 64,219 27,293,075 

Review records ................................ 1 work-hour × $85 per hour = $85 ............................... 0 85 36,125 

Report results ................................... 1 work hour × $85 per hour = $85 ............................... 0 85 36,125 

The FAA has included all known 

costs in its cost estimate. According to 

the manufacturer, however, some of the 

costs of this AD may be covered under 

warranty, thereby reducing the cost 

impact on affected operators. 

Paperwork Reduction Act 

A federal agency may not conduct or 

sponsor, and a person is not required to 

respond to, nor shall a person be subject 

to a penalty for failure to comply with 

a collection of information subject to the 

requirements of the Paperwork 

Reduction Act unless that collection of 

information displays a currently valid 

OMB Control Number. The OMB 

Control Number for this information 

collection is 2120–0056. Public 

reporting for this collection of 

information is estimated to be 

approximately 1 hour per response, 

including the time for reviewing 

instructions, searching existing data 

sources, gathering and maintaining the 

data needed, and completing and 

reviewing the collection of information. 

All responses to this collection of 

information are mandatory. Send 

comments regarding this burden 

estimate or any other aspect of this 

collection of information, including 

suggestions for reducing this burden to: 

Information Collection Clearance 

Officer, Federal Aviation 

Administration, 10101 Hillwood 

Parkway, Fort Worth, TX 76177–1524. 

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 has 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, 

(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: 

■ a. Removing Airworthiness Directive 

2020–12–06, Amendment 39–21141 (85 

FR 36143, June 15, 2020); and 

■ b. Adding the following new 

airworthiness directive: 

2022–02–15 Gulfstream Aerospace 

Corporation: Amendment 39–21912; 

Docket No. FAA–2021–0881; Project 

Identifier AD–2020–01062–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective February 24, 2022. 

(b) Affected ADs 

This AD replaces AD 2020–12–06, 

Amendment 39–21141 (85 FR 36143, June 

15, 2020) (AD 2020–12–06). 

(c) Applicability 

This AD applies to all Gulfstream 

Aerospace Corporation Model G–IV 

airplanes, certificated in any category. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 3200, Landing Gear System. 

(e) Unsafe Condition 

This AD was prompted by reports of uncommanded nose wheel steering turns. The 

FAA is issuing this AD to prevent moisture 

from entering the nose steering wheel servo 

valve, which could freeze and cause an uncommanded nose wheel steering position 

during touchdown. The unsafe condition, if 

not addressed, could result in a lateral 

runway departure. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Retained Airplane Flight Manual 

Revisions for Certain Airplanes 

This paragraph restates the requirements of 

paragraphs (g)(1) and (2) of AD 2020–12–06. 

Within 30 days after July 20, 2020 (the 

effective date of AD 2020–12–06), revise your 

airplane flight manual (AFM) by 

incorporating the revision applicable to your 

airplane configuration as listed in paragraphs 

(g)(1) and (2) of this AD: 

(1) Gulfstream IV Airplane Flight Manual, 

Gulfstream Aerospace Document Number 

GAC–AC–GIV–OPS–0001, Revision 52, dated 

October 30, 2017; or 

(2) Gulfstream G300 Airplane Flight 

Manual, Gulfstream Aerospace Document 

Number GAC–AC–G300–OPS–0001, Revision 

20, dated October 30, 2017. 

(h) Correction to AFM Revision for Certain 

Airplanes 

Within 30 days after the effective date of 

this AD, revise your AFM by incorporating 

Gulfstream G400 Airplane Flight Manual, 

Gulfstream Aerospace Document Number 

GAC–AC–G400–OPS–0001, Revision 20, 

dated October 30, 2017, if applicable to your 

airplane configuration. 


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3030 Federal Register / Vol. 87, No. 13 / Thursday, January 20, 2022 / Rules and Regulations 

(i) Retained Replacement of Nose Wheel 

Steering Servo Valve Manifold With No 

Changes 

This paragraph restates the requirements of 

paragraph (h) of AD 2020–12–06 with no 

changes. Within 36 months after July 20, 

2020 (the effective date of AD 2020–12–06), 

replace the nose wheel steering servo valve 

manifold with nose wheel steering servo 

valve manifold part number 5100–11 or 

5105–5 in accordance with the 

Accomplishment Instructions of the 

customer bulletin that applies to your 

airplane configuration as listed in paragraphs 

(i)(1) through (3) of this AD, except you are 

not required to comply with step H: 

(1) Gulfstream IV Customer Bulletin 

Number 244, dated March 12, 2018; 

(2) Gulfstream G300 Customer Bulletin 

244, dated March 12, 2018; or 

(3) Gulfstream G400 Customer Bulletin 

244, dated March 12, 2018. 

(j) Retained Records Inspection and Report 

of Results With No Changes 

This paragraph restates the requirements of 

paragraph (i) of AD 2020–12–06 with no 

changes. 

(1) Between 12 months and 24 months after 

the replacement of the nose wheel steering 

valve manifold assembly required in 

paragraph (i) of this AD, inspect all aircraft 

records for entries of an un-commanded nose 

wheel steering turn. 

(2) Within 10 days after the records 

inspection required in paragraph (j)(1) of this 

AD, report the results of the inspection, 

regardless of whether the inspection found 

any entries, to the FAA by either email: 9- 

ASO-ATLCOS-Reporting@faa.gov; or by mail: 

Attn: Continued Operational Safety, Atlanta 

ACO Branch, FAA, 1701 Columbia Avenue, 

College Park, GA 30337. The report must 

include as much of the information listed in 

paragraphs (j)(2)(i) through (vii) of this AD as 

is known about the event: 

(i) Date of records inspection; 

(ii) Date and time of all un-commanded 

occurrences (if any); 

(iii) Airplane serial number; 

(iv) Weather and runway conditions at the 

time of each occurrence; 

(v) Copy of the pilot’s report of the 

occurrence (if available); 

(vi) Maintenance entry of the root cause of 

the un-commanded deflection (if available); 

and 

(vii) Any other information pertinent to the 

occurrence. 

(k) 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 paragraph (l) of this 

AD. 

(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. 

(l) Related Information 

For more information about this AD, 

contact Samuel Belete, Aviation Safety 

Engineer, Systems and Equipment Section, 

FAA, Atlanta ACO Branch, 1701 Columbia 

Avenue, College Park, GA 30337; phone: 

(404) 474–5580; fax: (404) 474–5606; email: 

samuel.belete@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 the AD specifies otherwise. 

(3) The following service information was 

approved for IBR on July 20, 2020 (85 FR 

36143, June 15, 2020). 

(i) Gulfstream IV Customer Bulletin 

Number 244, dated March 12, 2018. 

(ii) Gulfstream G300 Customer Bulletin 

244, dated March 12, 2018. 

(iii) Gulfstream G400 Customer Bulletin 

244, dated March 12, 2018. 

(iv) Gulfstream IV Airplane Flight Manual, 

Gulfstream Aerospace Document Number 

GAC–AC–GIV–OPS–0001, Revision 52, dated 

October 30, 2017. 

(v) Gulfstream G300 Airplane Flight 

Manual, Gulfstream Aerospace Document 

Number GAC–AC–G300–OPS–0001, Revision 

20, dated October 30, 2017. 

(vi) Gulfstream G400 Airplane Flight 

Manual, Gulfstream Aerospace Document 

Number GAC–AC–G400–OPS–0001, Revision 

20, dated October 30, 2017. 

(4) For service information identified in 

this AD, contact Gulfstream Aerospace 

Corporation, P.O. Box 2206, Savannah, GA 

31402; phone: (800) 810–4853; email: pubs@

gulfstream.com; website: https://

www.gulfstream.com/en/customer-support/. 

(5) You may view this service information 

at FAA, Airworthiness Products Section, 

Operational Safety Branch, FAA, 901 Locust, 

Kansas City, MO 64106. For information on 

the availability of this material at the FAA, 

call (817) 222–5110. 

(6) 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: fr.inspection@nara.gov, or go to: 

https://www.archives.gov/federal-register/cfr/ 

ibr-locations.html. 

Issued on January 13, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–00972 Filed 1–19–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0842; Project 

Identifier 2019–CE–032–AD; Amendment 

39–21871; AD 2021–26–12] 

RIN 2120–AA64 

Airworthiness Directives; Stemme AG 

Gliders 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Stemme AG Model Stemme S 12 gliders. 

This AD was prompted by mandatory 

continuing airworthiness information 

(MCAI) issued by the aviation authority 

of another country to identify and 

correct an unsafe condition on an 

aviation product. The MCAI describes 

the unsafe condition as the incorrect 

installation of an axle connecting the 

main landing gear (MLG) to the center 

steel frame. This AD requires inspecting 

the MLG installation and repairing if 

necessary. The FAA is issuing this AD 

to address the unsafe condition on these 

products. 

DATES: This AD is effective February 24, 

2022. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of February 24, 2022. 

ADDRESSES: For service information 

identified in this final rule, contact 

STEMME AG, Flugplatzstrasse F2, Nr. 

6–7, D–15344 Strausberg, Germany; 

phone: +49 (0) 3341 3612–0; fax: +49 (0) 

3341 3612–30; email: airworthiness@

stemme.de; website: https://

www.stemme.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 (817) 222–5110. It is also 

available at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2021–0842. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0842; 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, the MCAI, any comments 

received, and other information. The 


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