Federal Register / Vol. 86, No. 150 / Monday, August 9, 2021 / Proposed Rules 43449 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0620; Project 

Identifier 2019–SW–074–AD] 

RIN 2120–AA64 

Airworthiness Directives; He ́licopte`res 

Guimbal Helicopters 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

He ́licopte`res Guimbal (HG) Model Cabri 

G2 helicopters with certain partnumbered aluminum cooling fans 

(cooling fan) installed. This proposed 

AD was prompted by reports of two 

occurrences of in-flight shutdowns due 

to a crack and subsequent failure of the 

cooling fan. This proposed AD would 

require removing certain part-numbered 

cooling fans from service, or modifying 

certain part-numbered cooling fans 

before exceeding a certain total hours 

time-in-service (TIS), and installing 

newly designed cooling fans. This 

proposed AD would also prohibit 

installing any affected cooling fan on 

any helicopter. The FAA is proposing 

this AD to address the unsafe condition 

on these products. 

DATES: The FAA must receive comments 

on this proposed AD by September 23, 

2021. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

https://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: (202) 493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue SE, Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal 

holidays. 

For service information identified in 

this NPRM, contact He ́licopte`res 

Guimbal, Basile Ginel, 1070, rue du 

Lieutenant Parayre, Ae ́rodrome d’Aixen-Provence, 13290 Les Milles, France; 

telephone 33–04–42–39–10–88; email 

basile.ginel@guimbal.com; web https://

www.guimbal.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. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0620; 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 

NPRM, the European Union Aviation 

Safety Agency (EASA) AD, any 

comments received, and other 

information. The street address for 

Docket Operations is listed above. 

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; telephone (516) 228–7330; email 

andrea.jimenez@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

The FAA invites you to send any 

written relevant data, views, or 

arguments about this proposal. Send 

your comments to an address listed 

under ADDRESSES. Include ‘‘Docket No. 

FAA–2021–0620; Project Identifier 

2019–SW–074–AD’’ at the beginning of 

your comments. The most helpful 

comments reference a specific portion of 

the proposal, explain the reason for any 

recommended change, and include 

supporting data. The FAA will consider 

all comments received by the closing 

date and may amend this proposal 

because of those comments. 

Except for Confidential Business 

Information (CBI) as described in the 

following paragraph, and other 

information as described in 14 CFR 

11.35, the FAA will post all comments 

received, without change, to https://

www.regulations.gov, including any 

personal information you provide. The 

agency will also post a report 

summarizing each substantive verbal 

contact received about this NPRM. 

Confidential Business Information 

CBI is commercial or financial 

information that is both customarily and 

actually treated as private by its owner. 

Under the Freedom of Information Act 

(FOIA) (5 U.S.C. 552), CBI is exempt 

from public disclosure. If your 

comments responsive to this NPRM 

contain commercial or financial 

information that is customarily treated 

as private, that you actually treat as 

private, and that is relevant or 

responsive to this NPRM, it is important 

that you clearly designate the submitted 

comments as CBI. Please mark each 

page of your submission containing CBI 

as ‘‘PROPIN.’’ The FAA will treat such 

marked submissions as confidential 

under the FOIA, and they will not be 

placed in the public docket of this 

NPRM. Submissions containing CBI 

should be sent to Andrea Jimenez, 

Aerospace Engineer, COS Program 

Management Section, Operational 

Safety Branch, Compliance & 

Airworthiness Division, FAA, 1600 

Stewart Ave., Suite 410, Westbury, NY 

11590; telephone (516) 228–7330; email 

andrea.jimenez@faa.gov. Any 

commentary that the FAA receives 

which is not specifically designated as 

CBI will be placed in the public docket 

for this rulemaking. 

Background 

EASA, which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2014–0038, 

dated February 14, 2014 (EASA AD 

2014–0038), to correct an unsafe 

condition for He ́licopte`res Guimbal 

Model Cabri G2 helicopters. EASA 

advises of a report of an in-flight engine 

shutdown caused by a failure of the 

cooling fan. EASA further advises the 

failure of the cooling fan was caused by 

a crack in the fan external ring. After 

EASA AD 2014–0038 was issued, a 

second occurrence was reported of an 

in-flight engine shutdown caused by 

failure of the cooling fan, which was 

determined to be caused by a crack on 

the cooling fan front flange. 

Accordingly, EASA issued EASA AD 

2014–0196, dated September 2, 2014 

(EASA AD 2014–0196), which retained 

the modification requirements of EASA 

AD 2014–0038 and required repetitive 

inspections of the engine cooling fan 

front flange and corrective actions 

depending on the findings. After EASA 

issued EASA AD 2014–0196, further 

analysis determined the crack was 

caused by the engine start/stop (ESS) 

cycles. Therefore, EASA superseded 

EASA AD 2014–0196 with EASA AD 

2016–0033, dated February 24, 2016 

(EASA AD 2016–0033), which retained 

the inspection and modification 

requirements of EASA AD 2014–0196 

and depending on the findings, required 

replacement of the affected part pending 

approval of the newly designed part. 

After EASA issued EASA AD 2016– 

0033, HG developed a newly designed 

engine cooling fan part number (P/N) 

G52–04–101, which consists of 

composite materials having improved 

structural strength. Accordingly, EASA 

superseded EASA AD 2016–0033 with 

EASA AD 2017–0039, dated February 


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43450 Federal Register / Vol. 86, No. 150 / Monday, August 9, 2021 / Proposed Rules 

24, 2017 (EASA AD 2017–0039), which 

retained the requirements of EASA AD 

2016–0033 and required replacing the 

affected cooling fans with the newly 

designed cooling fan which terminates 

the repetitive inspections from EASA 

AD 2016–0033. 

Since EASA issued EASA AD 2017– 

0039, HG issued a revision to its service 

bulletin requiring a life limit 

requirement for the replacement of the 

affected cooling fans. Accordingly, 

EASA superseded EASA AD 2017–0039 

with EASA AD 2019–0187, dated July 

31, 2019, and corrected August 2, 2019 

(EASA AD 2019–0187). EASA AD 2019– 

0187 retains some of the requirements 

in EASA AD 2017–0039 and requires a 

new compliance time and life limit for 

the replacement of the affected part. 

EASA AD 2019–0187 also removes the 

modification and inspection 

requirements which are covered by 

EASA AD 2019–0025, dated February 4, 

2019. 

The unsafe condition described in the 

EASA ADs, if not addressed, could 

result in failure of the cooling fan and 

subsequent engine in-flight shut-down 

and reduced control of the helicopter. 

FAA’s Determination 

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 is 

proposing this AD after evaluating all 

known relevant information and 

determining that the unsafe condition 

described previously is likely to exist or 

develop on other helicopters of the same 

type designs. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed Guimbal Service 

Bulletin SB 16–021, Revision E, dated 

August 27, 2019. This service 

information specifies instructions for 

retrofitting the cooling fan with the new 

front flange, aft ring, and 24-hole pulley. 

This service information also specifies 

that upon completion of all the required 

actions, the cooling fan assembly P/N 

G52–00–000, P/N G52–00–001 and P/N 

G52–04–100 become P/N G52–04–101. 

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 Guimbal 

Service Bulletin SB 16–021, Revision D, 

dated May 20, 2019, which is not 

incorporated by reference, and which 

specifies procedures for accessing the 

cooling fan and removing it from 

service; modifying, applying adhesive 

and torqueing the rear flange; installing 

the improved cooling fan, and 

additional actions. 

Proposed AD Requirements in This 

NPRM 

This proposed AD would require 

removing from service any affected partnumbered cooling fan. An alternative, 

for certain part-numbered cooling fans, 

modifying the cooling fan before it 

exceeds a certain total hours TIS. 

Differences Between This Proposed AD 

and EASA AD 2019–0187 

EASA AD 2019–0187 allows certain 

cooling fans with certain total hours TIS 

to be retrofitted before exceeding their 

life limit, whereas this proposed AD 

would require removing these cooling 

fans from service or as an alternate to 

removing them from service, modifying 

the cooling fan before exceeding the 

total hours TIS. EASA AD 2019–0187 

allows a compliance time in months TIS 

to replace certain part-numbered 

cooling fans, whereas this proposed AD 

would only allow hours TIS. 

EASA AD 2019–0187 retains the 

compliance time of March 10, 2017, 

which is the effective date of EASA AD 

2017–0039. This proposed AD would 

require compliance within the effective 

date of this AD. The FAA has 

determined that these compliance times 

are adequate to address the identified 

unsafe condition. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 32 

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 proposed AD. 

Removing the affected cooling fan 

from service and installing the newly 

designed cooling fan would take about 

16 work-hours and parts would cost 

about $4,600 for an estimated cost of 

$5,960 per replacement and $190,720 

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 

The FAA determined that this 

proposed AD would not have federalism 

implications under Executive Order 

13132. This proposed AD would 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, I certify 

this proposed regulation: 

(1) Is not a ‘‘significant regulatory 

action’’ under Executive Order 12866, 

(2) Would not affect intrastate 

aviation in Alaska, and 

(3) Would 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 Proposed Amendment 

Accordingly, under the authority 

delegated to me by the Administrator, 

the FAA proposes to amend 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: 

He ́licopte`res Guimbal: Docket No. FAA– 

2021–0620; Project Identifier 2019–SW– 

074–AD. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by September 

23, 2021. 

(b) Affected ADs 

None. 


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Federal Register / Vol. 86, No. 150 / Monday, August 9, 2021 / Proposed Rules 43451 

(c) Applicability 

This AD applies to He ́licopte`res Guimbal 

(HG) Model Cabri G2 helicopters, certificated 

in any category, the following aluminum 

cooling fan (cooling fan) part number (P/N) 

installed: 

(1) P/N G52–00–000, 

(2) P/N G52–00–001 or P/N G52–04–100, if 

it is or has previously been mounted on a 12- 

hole engine pulley P/N G52–10–100 or P/N 

G52–10–101. 

(d) Subject 

Joint Aircraft Service Component (JASC) 

Code: 7100, Powerplant System. 

(e) Unsafe Condition 

This AD was prompted by reports of inflight engine shutdowns due to a crack and 

subsequent failure of the cooling fan. The 

FAA is issuing this AD to prevent failure of 

the cooling fan. This condition, if not 

addressed, could result in an in-flight engine 

shut-down and loss of control of the 

helicopter. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) For Model Cabri G2 helicopters with 

cooling fan P/N G52–00–000 installed, 

within 150 hours time-in-service (TIS) after 

the effective date of this AD: 

(i) Remove the cooling fan from service by 

following the Required Actions, Cooling Fan 

Removal, paragraphs (a) through (g), of 

Guimbal Service Bulletin SB 16–021, 

Revision E, dated August 27, 2019 (SB 16– 

021 Rev E), except you are not required to 

discard any parts. 

(ii) Install the improved cooling fan P/N 

G52–04–101 by following the Required 

Actions, Cooling Fan Installation, paragraphs 

(a) through (j), of SB 16–021 Rev E. 

(2) For Model Cabri G2 helicopters with a 

cooling fan P/N G52–00–001 or P/N G52–04– 

100 that is mounted or was previously 

mounted on a 12-hole engine pulley P/N 

G52–10–100 or P/N G52–10–101, and with 

1,500 or more total hours TIS, since first 

installation on a helicopter, within 150 hours 

TIS after the effective date of this AD: 

(i) Remove the cooling fan from service by 

following the Required Actions, Cooling Fan 

Removal, paragraphs (a) through (g), of SB 

16–021 Rev E, except you are not required to 

discard any parts, or remove the cooling fan 

by following the Required Actions, Cooling 

Fan Removal, paragraphs (a) through (g), of 

SB 16–021 Rev E and modify the cooling fan 

by following the Required Actions, Cooling 

Fan Retrofit, paragraphs (a) through (h) of SB 

16–021 Rev E. 

(ii) Install the improved cooling fan P/N 

G52–04–101 by following the Required 

Actions, Cooling Fan Installation, paragraphs 

(a) through (j), of SB 16–021 Rev E. 

(3) For Model Cabri G2 helicopters with a 

cooling fan P/N G52–00–001 or P/N G52–04– 

100 that is mounted or was previously 

mounted on a 12-hole engine pulley P/N 

G52–10–100 or P/N G52–10–101 and with 

500 total hours TIS but with less than 1,500 

total hours TIS, since first installation on a 

helicopter, within 500 hours TIS after the 

effective date of this AD, perform the actions 

required by paragraphs (g)(2)(i) and (ii) of 

this AD. 

(4) For Model Cabri G2 helicopters with a 

cooling fan P/N G52–00–001 or P/N G52–04– 

100 that is mounted or was previously 

mounted on a 12-hole engine pulley P/N 

G52–10–100 or P/N G52–10–101 and with 

less than 500 total hours TIS since first 

installation on a helicopter, within 1,000 

hours TIS after the effective date of this AD, 

perform the actions required by paragraphs 

(g)(2)(i) and (ii) of this AD. 

(5) As of the effective date of this AD, do 

not install any cooling fan listed in paragraph 

(c) of this AD on any helicopter. 

(h) Credit for Previous Actions 

This paragraph provides credit for the 

actions specified in paragraph (g) of this AD, 

if those actions were performed before the 

effective date of this AD using Guimbal 

Service Bulletin SB 16–021, Revision D, 

dated May 20, 2019. 

(i) 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 (j)(1) 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. 

(j) Related Information 

(1) 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; 

telephone (516) 228–7330; email 

andrea.jimenez@faa.gov. 

(2) For service information identified in 

this AD, contact He ́licopte`res Guimbal, Basile 

Ginel, 1070, rue du Lieutenant Parayre, 

Ae ́rodrome d’Aix-en-Provence, 13290 Les 

Milles, France; telephone 33–04–42–39–10– 

88; email basile.ginel@guimbal.com; web 

https://www.guimbal.com. You may view 

this referenced 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. 

(3) The subject of this AD is addressed in 

European Union Aviation Safety Agency 

(EASA) AD 2019–0187, dated July 31, 2019 

and corrected August 2, 2019. You may view 

the EASA AD on the internet at https://

www.regulations.gov in Docket No. FAA– 

2021–0620. 

Issued on July 30, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–16684 Filed 8–6–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0616; Project 

Identifier MCAI–2021–00256–T] 

RIN 2120–AA64 

Airworthiness Directives; Saab AB, 

Support and Services (Formerly 

Known as Saab AB, Saab Aeronautics) 

Airplanes 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking 

(NPRM). 

SUMMARY: The FAA proposes to adopt a 

new airworthiness directive (AD) for 

certain Saab AB, Support and Services 

Model SAAB 340B airplanes. This 

proposed AD was prompted by a report 

that the circuit breaker for the 

emergency cabin lighting tripped 

without fault in the system. This 

proposed AD would require replacing a 

certain circuit breaker with a part 

having a higher rating, as specified in a 

European Union Aviation Safety Agency 

(EASA) AD, which is proposed for 

incorporation by reference. The FAA is 

proposing this AD to address the unsafe 

condition on these products. 

DATES: The FAA must receive comments 

on this proposed AD by September 23, 

2021. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

https://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: 202–493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue SE, Washington, DC 20590. 

• Hand Delivery: Deliver to Mail 

address above between 9 a.m. and 5 

p.m., Monday through Friday, except 

Federal holidays. 

For material that will be incorporated 

by reference (IBR) in this AD, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 

8999 000; email ADs@easa.europa.eu; 


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