Federal Register / Vol. 87, No. 28 / Thursday, February 10, 2022 / Rules and Regulations 7705 

(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: 

2022–03–11 Bombardier, Inc.: Amendment 

39–21928; Docket No. FAA–2021–1014; 

Project Identifier MCAI–2021–00428–T. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective March 17, 2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Bombardier, Inc., 

Model BD–100–1A10 airplanes. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 27, Flight controls. 

(e) Unsafe Condition 

This AD was prompted by a report that the 

design of the spoiler control system causes 

certain engine indication and crew alerting 

system (EICAS) messages to be posted 

intermittently and repetitively during flight 

and on the ground, and flightcrews must 

action the appropriate checklist each time 

these messages appear. The FAA is issuing 

this AD to address intermittent and repetitive 

messaging, which increases overall workload 

and introduces a risk that flightcrews could 

become desensitized over time to the 

messages. This could result in the required 

checklist not being carried out or completed, 

and could adversely affect the airplane’s 

continued safe flight and landing. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Revision of the Airplane Flight Manual 

(AFM) 

Within 60 days after the effective date of 

this AD: Revise the existing AFM to 

incorporate the information specified in 

Section 05–23, Flight Controls, of Chapter 05, 

Non-Normal Procedures, of the AFM 

revisions specified in paragraphs (g)(1) and 

(2) of this AD, as applicable. 

(1) Bombardier Challenger 300 (Imperial 

Version) Airplane Flight Manual, Publication 

No. CSP 100–1, Revision 61, dated 

September 25, 2020. 

Note 1 to paragraph (g)(1): For obtaining 

this section of the Bombardier Challenger 300 

(Imperial Version) Airplane Flight Manual, 

Publication No. CSP 100–1, use Document 

Identification No. CH 300 AFM–I. 

(2) Bombardier Challenger 350 Airplane 

Flight Manual, Publication No. CH 350 AFM, 

Revision 27, dated September 25, 2020. 

(h) Other FAA AD Provisions 

The following provisions also apply to this 

AD: 

(1) Alternative Methods of Compliance 

(AMOCs): The Manager, New York 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 

responsible Flight Standards Office, as 

appropriate. If sending information directly 

to the manager of the certification office, 

send it to ATTN: Program Manager, 

Continuing Operational Safety, FAA, New 

York ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 

516–228–7300; fax 516–794–5531. 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, New York ACO Branch, 

FAA; or Transport Canada Civil Aviation 

(TCCA); or Bombardier, Inc.’s TCCA Design 

Approval Organization (DAO). If approved by 

the DAO, the approval must include the 

DAO-authorized signature. 

(i) Related Information 

(1) Refer to Mandatory Continuing 

Airworthiness Information (MCAI) TCCA AD 

CF–2021–14, dated April 7, 2021, 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–2021–1014. 

(2) For more information about this AD, 

contact Thomas Niczky, Aerospace Engineer, 

Avionics and Electrical Systems Section, 

FAA, New York ACO Branch, 1600 Stewart 

Avenue, Suite 410, Westbury, NY 11590; 

telephone 516–228–7347; fax 516–794–5531; 

email 9-avs-nyaco-cos@faa.gov. 

(j) 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) Section 05–23, Flight Controls, of 

Chapter 05, Non-Normal Procedures, of the 

Bombardier Challenger 300 (Imperial 

Version) Airplane Flight Manual, Publication 

No. CSP 100–1, Revision 61, dated 

September 25, 2020. 

(ii) Section 05–23, Flight Controls, of 

Chapter 05, Non-Normal Procedures, of the 

Bombardier Challenger 350 Airplane Flight 

Manual, Publication No. CH 350 AFM, 

Revision 27, dated September 25, 2020. 

(3) For service information identified in 

this AD, contact Bombardier Business 

Aircraft Customer Response Center, 400 CoˆteVertu Road West, Dorval, Que ́bec H4S 1Y9, 

Canada; telephone 514–855–2999; email 

ac.yul@aero.bombardier.com; internet http:// 

www.bombardier.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 fr.inspection@nara.gov, or go to: 

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

ibr-locations.html. 

Issued on January 21, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–02755 Filed 2–9–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0886; Project 

Identifier MCAI–2021–00341–R; Amendment 

39–21903; AD 2022–02–06] 

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 all 

Airbus Helicopters Model EC120B 

helicopters. This AD was prompted by 

a report of geometrical non-conformities 

in the tail rotor blade (TRB) root section 

discovered during an accident 

investigation of a Model EC130B 

helicopter. Due to the similarity of 

design and production requirements, 

certain TRBs for the Model EC120B 

helicopters were inspected and 


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7706 Federal Register / Vol. 87, No. 28 / Thursday, February 10, 2022 / Rules and Regulations 

geometrical non-conformities were also 

found. This AD requires an inspection 

(dimensional check) to verify 

conformity, and replacement of certain 

TRBs if necessary, 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 17, 

2022. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of March 17, 2022. 

ADDRESSES: For EASA material 

incorporated by reference (IBR) in this 

AD, contact EASA, Konrad-AdenauerUfer 3, 50668 Cologne, Germany; phone: 

+49 221 8999 000; email: ADs@

easa.europa.eu; internet: 

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

EASA material on the EASA website at 

https://ad.easa.europa.eu. 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 at https://www.regulations.gov 

by searching for and locating Docket No. 

FAA–2021–0886. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0886; 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 EASA AD, 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: 

Andrea Jimenez, Aerospace Engineer, 

COS Program Management Section, 

Operational Safety Branch, Compliance 

& Airworthiness Division, FAA, 1600 

Stewart Ave., Suite 410, Westbury, NY 

11590; phone: (516) 228–7330; email: 

andrea.jimenez@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2021–0079, 

dated March 17, 2021 (EASA AD 2021– 

0079), to correct an unsafe condition for 

all Airbus Helicopters Model EC120B 

helicopters. 

The FAA issued a notice of proposed 

rulemaking (NPRM) to amend 14 CFR 

part 39 by adding an AD that would 

apply to all Airbus Helicopters Model 

EC120B helicopters. The NPRM 

published in the Federal Register on 

October 28, 2021 (86 FR 59653). The 

NPRM was prompted by a report of 

geometrical non-conformities in the 

TRB root section discovered during an 

accident investigation of a Model 

EC130B helicopter. Due to the similarity 

of design and production requirements, 

certain TRBs for the Model EC120B 

helicopters were inspected and 

geometrical non-conformities were also 

found. The NPRM proposed to require 

an inspection (dimensional check) to 

verify conformity, and replacement of 

certain TRBs if necessary, as specified 

in EASA AD 2021–0079. 

The FAA is issuing this AD to detect 

and correct geometrical non 

conformities of the TRB root section. 

The unsafe condition, if not addressed, 

could result in crack initiation and TRB 

failure, and possibly result in loss of 

control of the helicopter. See EASA AD 

2021–0079 for additional background 

information. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received no comments on 

the NPRM or on the determination of 

the costs. 

Conclusion 

These helicopters have been approved 

by EASA and are approved for operation 

in the United States. Pursuant to the 

FAA’s bilateral agreement with the 

European Union, EASA has notified the 

FAA about the unsafe condition 

described in its AD. The FAA reviewed 

the relevant data and determined that 

air safety requires adopting this AD as 

proposed. Accordingly, the FAA is 

issuing this AD to address the unsafe 

condition on these helicopters. Except 

for minor editorial changes, this AD is 

adopted as proposed in the NPRM. 

Related Service Information Under 1 

CFR Part 51 

EASA AD 2021–0079 requires an 

inspection (dimensional check) to verify 

TRB conformity, and replacement of 

certain TRBs if necessary. EASA AD 

2021–0079 also prohibits rework, repair, 

or modification of affected parts in the 

critical section (affected area of the TRB 

assembly root). 

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 89 helicopters of U.S. Registry. 

Labor rates are estimated at $85 per 

work-hour. Based on these numbers, the 

FAA estimates the following costs to 

comply with this AD. 

ESTIMATED COSTS

Action Labor cost Parts cost Cost per 

product 

Cost on U.S. 

operators 

Inspection ............... 4 work-hours × $85 per hour = $340 ...................................................... $0 $340 $30,260 

The FAA estimates the following 

costs to do any necessary replacements 

that would be required based on the 

results of the required inspection. The 

agency has no way of determining the 

number of aircraft that might need these 

replacements: 

ON-CONDITION COSTS

Action Labor cost Parts cost Cost per 

product 

Blade Replacement ...................................................... 10 work-hours × $85 per hour = $850 ......................... $4,000 $4,850 


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Federal Register / Vol. 87, No. 28 / Thursday, February 10, 2022 / Rules and Regulations 7707 

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. 

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: 

2022–02–06 Airbus Helicopters: 

Amendment 39–21903; Docket No. 

FAA–2021–0886; Project Identifier 

MCAI–2021–00341–R. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective March 17, 2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to all Airbus Helicopters 

Model EC120B helicopters, certificated in 

any category. 

(d) Subject 

Joint Aircraft Service Component (JASC) 

Code: 6410, Tail Rotor Blades. 

(e) Unsafe Condition 

This AD was prompted by a report of 

geometrical non-conformities in the tail rotor 

blade (TRB) root section discovered during 

an accident investigation of a Model EC130B 

helicopter. Due to the similarity of design 

and production requirements, certain TRBs 

for the Model EC120B helicopters were 

inspected and geometrical non-conformities 

were also found. The FAA is issuing this AD 

to detect and correct geometrical nonconformities of the TRB root section. The 

unsafe condition, if not addressed, could 

result in crack initiation and TRB failure, and 

possibly result in loss of control of the 

helicopter. 

(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 2021–0079, dated 

March 17, 2021 (EASA AD 2021–0079). 

(h) Exceptions to EASA AD 2021–0079 

(1) Where EASA AD 2021–0079 requires 

compliance in terms of flight hours, this AD 

requires using hours time-in-service. 

(2) Where EASA AD 2021–0079 refers to its 

effective date, this AD requires using the 

effective date of this AD. 

(3) Where the service information 

referenced in EASA AD 2021–0079 specifies 

discarding a part, this AD requires removing 

that part from service. 

(4) This AD does not mandate compliance 

with the ‘‘Remarks’’ section of EASA AD 

2021–0079. 

(5) Where the service information 

referenced in EASA AD 2021–0079 specifies 

to measure using the Smartphone 

application, the PowerPoint method, or 

‘‘Contacting customer support with a specific 

procedure,’’ this AD requires determining the 

specified measurements but those methods of 

measurement are not required by this AD. 

(i) No Reporting Requirement 

Although the service information 

referenced in EASA AD 2021–0079 specifies 

to submit certain information to the 

manufacturer, this AD does not include that 

requirement. 

(j) Special Flight Permit 

Special flight permits may be issued in 

accordance with 14 CFR 21.197 and 21.199 

to operate the helicopter to a location where 

the actions of this AD can be performed, 

provided no passengers are onboard. 

(k) 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 (l) 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. 

(l) Related Information 

For more information about this AD, 

contact Andrea Jimenez, Aerospace Engineer, 

COS Program Management Section, 

Operational Safety Branch, Compliance & 

Airworthiness Division, FAA, 1600 Stewart 

Ave., Suite 410, Westbury, NY 11590; phone: 

(516) 228–7330; email: andrea.jimenez@

faa.gov. 

(m) 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 this AD specifies otherwise. 

(i) European Union Aviation Safety Agency 

(EASA) AD 2021–0079, dated March 17, 

2021. 

(ii) [Reserved] 

(3) For EASA AD 2021–0079, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; phone: +49 221 8999 000; 

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

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

EASA material on the EASA website at 

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

(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 


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7708 Federal Register / Vol. 87, No. 28 / Thursday, February 10, 2022 / Rules and Regulations 

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

for and locating Docket No. FAA–2021–0886. 

(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 

fr.inspection@nara.gov, or go to: https:// 

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

Issued on January 7, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–02748 Filed 2–9–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0952; Project 

Identifier 2019–CE–039–AD; Amendment 

39–21918; AD 2022–03–01] 

RIN 2120–AA64 

Airworthiness Directives; Diamond 

Aircraft Industries GmbH Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

Diamond Aircraft Industries GmbH 

(DAI) Model DA 42, DA 42 M–NG, and 

DA 42 NG airplanes. 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 dissolved or detached fuel 

tank hose material entering the main 

fuel tank chambers, which could result 

in restricted fuel flow with consequent 

fuel starvation. This AD requires 

removing the fuel tank connection hoses 

from service and inspecting the fuel 

tank connection hoses for damage and 

detached rubber material. The FAA is 

issuing this AD to address the unsafe 

condition on these products. 

DATES: This AD is effective March 17, 

2022. 

The Director of the Federal Register 

approved the incorporation by reference 

of a certain publication listed in this AD 

as of March 17, 2022. 

ADDRESSES: For service information 

identified in this final rule, contact 

Diamond Aircraft Industries GmbH, 

N.A. Otto-Stra+e 5, A–2700 Wiener 

Neustadt, Austria; phone: +43 2622 

26700; fax: +43 2622 26780; email: 

office@diamond-air.at; website: https://

www.diamondaircraft.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–2021–0952. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0952; 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 

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: 

Penelope Trease, Aviation Safety 

Engineer, General Aviation & Rotorcraft 

Section, International Validation 

Branch, FAA, 26805 E. 68th Avenue, 

Denver, CO 80249; phone: (303) 342– 

1094; fax: (303) 342–1088; email: 

penelope.trease@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 DAI Model DA 42, DA 42 M– 

NG, and DA 42 NG airplanes with a 

certain fuel tank connection hose 

installed. The NPRM published in the 

Federal Register on November 3, 2021 

(86 FR 60600). The NPRM was 

prompted by MCAI originated by the 

European Union Aviation Safety Agency 

(EASA), which is the Technical Agent 

for the Member States of the European 

Union. EASA issued EASA AD 2019– 

0218, dated September 3, 2019 (referred 

to after this as ‘‘the MCAI’’), to address 

an unsafe condition on certain DAI 

Model DA 42, DA 42M, DA 42 M–NG, 

and DA 42 NG airplanes. The MCAI 

states: 

Reports were received of dissolved fuel 

tank connections hoses. Rubber parts were 

found within the fuel tank. The investigation 

results showed that the affected parts are 

limited to 2 isolated batches, some of which 

were installed on the production line. Other 

affected parts have been supplied as spare for 

in-service replacement. 

This condition, if not corrected, could lead 

to restricted fuel flow from the tank, possibly 

resulting in fuel starvation and consequent 

reduced control of the aeroplane. 

To address this potential unsafe condition, 

DAI issued the applicable MSB [Mandatory 

Service Bulletin], providing instructions to 

identify and replace the affected parts. The 

applicable MSB identifies the MSN 

[manufacturer serial numbers] of the 

aeroplanes on which affected parts were 

installed during aeroplane production. The 

applicable MSB also indicates that any other 

aeroplane may be affected, if an affected part 

supplied as spare was installed. 

For the reason described above, this 

[EASA] AD requires removal and 

replacement of the affected parts, and, if a 

removed affected part is found damaged, 

inspection of the fuel tank chambers and 

removal of any detached rubber material. 

This [EASA] AD also prohibits 

(re)installation of any affected parts. 

You may examine the MCAI in the 

AD docket at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2021– 

0952. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received no comments on 

the NPRM or on the determination of 

the costs. 

Conclusion 

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 this State of 

Design Authority, it has notified the 

FAA of the unsafe condition described 

in the MCAI and service information 

referenced above. The FAA reviewed 

the relevant data and determined that 

air safety requires adopting this 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, 

except for an editorial correction to the 

Applicability section. Paragraph (c)(1) 

states the AD applies to the airplanes in 

paragraph (c)(1) ‘‘or’’ paragraph (c)(2) 

when it should state the AD applies to 

airplanes identified in both paragraphs. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Diamond Aircraft 

Mandatory Service Bulletin MSB 42– 

138/MSB 42NG–080, dated July 1, 2019 

(issued as one document) published 

with Diamond Aircraft Work Instruction 

WI MSB 42–138/WI–MSB 42NG–080, 

Revision 0, dated July 1, 2019 (issued as 

one document) attached. This service 

information identifies the list of affected 

fuel tank connection hoses and also 

contains procedures for replacing the 


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