Federal Register / Vol. 86, No. 164 / Friday, August 27, 2021 / Proposed Rules 48067 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to Stemme AG Model 

Stemme S 12 gliders, all serial numbers, 

certificated in any category. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 3414, Airspeed/Mach Indicator. 

(e) Unsafe Condition 

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 an airspeed 

indicator (ASI) with speed markings 

inconsistent with the approved and 

published values (beginning of the white and 

green arc). The FAA is issuing this AD to 

prevent erroneous information being 

provided to the pilot, particularly at the 

lower speed operation limits. The unsafe 

condition, if not addressed, could result in 

reduced control of the glider. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Required Actions 

(1) Within 30 days after the effective date 

of this AD, inspect ASI part number (P/N) IF– 

W230 or IF–W190 for incorrect markings in 

accordance with the table in the Appendix, 

‘‘2.3. Airspeed Indicator Markings,’’ of 

Stemme Service Bulletin No. P062–980027, 

Revision 00, dated December 17, 2018 (the 

SB). If an ASI marking is incorrect, before 

further flight, perform one of the following: 

(i) Replace the ASI by following the 

Actions, Action 2, of the SB; or 

(ii) Amend the existing aircraft flight 

manual (AFM) for your glider by inserting 

the Appendix, temporary page 2–3 SB, ‘‘2.3. 

Airspeed Indicator Markings,’’ of the SB. 

Within 3 months after amending the AFM, 

replace the ASI by following the Actions, 

Action 2, of the SB and remove temporary 

page 2–3 SB, ‘‘2.3. Airspeed Indicator 

Markings,’’ from the AFM. 

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

not install ASI P/N IF–W230 or IF–W190 on 

any glider unless it has passed the inspection 

required by this AD. 

(h) 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 certification office, 

send it to the attention of the person 

identified in Related Information or email: 9- 

AVS-AIR-730-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. 

(i) Related Information 

(1) For more information about this AD, 

contact Jim Rutherford, Aviation Safety 

Engineer, General Aviation & Rotorcraft 

Section, International Validation Branch, 

FAA, 901 Locust, Room 301, Kansas City, 

MO 64106; phone: (816) 329–4165; fax: (816) 

329–4090; email: jim.rutherford@faa.gov. 

(2) Refer to European Union Aviation 

Safety Agency (EASA) AD 2019–0082, dated 

April 12, 2019, for more information. You 

may examine the EASA AD in the AD docket 

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

for and locating it in Docket No. FAA–2021– 

0716. 

(3) For service information identified in 

this AD, 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 

referenced 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 (816) 329–4148. 

Issued on August 20, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–18387 Filed 8–26–21; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2021–0714; Project 

Identifier 2019–CE–016–AD] 

RIN 2120–AA64 

Airworthiness Directives; ASI Aviation 

(Type Certificate Previously Held by 

Reims Aviation S.A.) 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 all 

ASI Aviation (type certificate previously 

held by Reims Aviation S.A.) Model 

F406 airplanes. This proposed AD was 

prompted by mandatory continuing 

airworthiness information (MCAI) 

originated by an aviation authority of 

another country to identify and correct 

an unsafe condition on an aviation 

product. The MCAI describes the unsafe 

condition as failure of a circuit breaker 

(CB) switch. This proposed AD would 

require replacing certain CB switches 

and establishing a life limit for the CB 

switches. 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 October 12, 

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 service information identified in 

this NPRM, contact ASI Aviation, 

Ae ́rodrome de Reims Prunay, 51360 

Prunay, France; telephone: +33 3 26 48 

46 84; fax: +33 3 26 49 18 57; email: 

contact@asi-aviation.fr; website: https:// 

asi-aviation.fr/page-Accueil.html. You 

may view this service information at the 

Airworthiness Products Section, 

Operational Safety Branch, 901 Locust, 

Kansas City, MO 64106. For information 

on the availability of this material at the 

FAA, call (816) 329–4148. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2021–0714; 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 MCAI, any comments 

received, and other information. The 

street address for Docket Operations is 

listed above. 

FOR FURTHER INFORMATION CONTACT: 

Gregory Johnson, Aviation Safety 

Engineer, AIR–732 International 

Validation Section FAA, 901 Locust, 

Room 301, Kansas City, MO 64106– 

2641; phone: (720) 626–5462; email: 

gregory.johnson@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–2021–0714; Project Identifier 

2019–CE–016–AD’’ at the beginning of 

your comments. The most helpful 

comments reference a specific portion of 


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48068 Federal Register / Vol. 86, No. 164 / Friday, August 27, 2021 / Proposed Rules 

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 the 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 proposed 

AD. 

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 Gregory Johnson, 

Aviation Safety Engineer, AIR–732 

International Validation Section FAA, 

901 Locust, Room 301, Kansas City, MO 

64106–2641. Any commentary that the 

FAA receives which is not specifically 

designated as CBI will be placed in the 

public docket for this rulemaking. 

Background 

The European Aviation Safety Agency 

(EASA), which is the Technical Agent 

for the Member States of the European 

Union, has issued EASA AD 2019–0015, 

dated January 29, 2019 (referred to after 

this as ‘‘the MCAI’’), to address an 

unsafe condition on ASI Aviation (type 

certificate previously held by Reims 

Aviation S.A.) Model F406 airplanes. 

The MCAI states: 

After the Federal Aviation Administration 

issued AD 2005–20–25, applicable to Cessna 

400 series aeroplanes equipped with certain 

avionics bus CB switches, it was determined 

that, due to design commonality, one of the 

affected avionics bus CB switches, P/N [part 

number] CM3589–50, was also installed on 

Reims F 406 aeroplanes. 

This condition, if not corrected, could lead 

to smoke and/or burning smell in the cockpit, 

possibly resulting in reduced control of the 

aeroplane. 

To address that potential unsafe condition, 

RAI issued SB [service bulletin] F406–62 to 

provide instructions to remove certain 

switches from service. Consequently, EASA 

issued AD 2006–0134 to require 

identification of the date code of P/N 

CM3589–50 CB switches and, depending on 

findings, replacement with improved design 

CB switches, P/N 4061–2400–1. That [EASA] 

AD also imposed a life limit on the affected 

CB switches P/N CM3589–50. 

Since that [EASA] AD was issued, inservice occurrences of smoke and burning 

smell in the cockpit have been reported on 

F 406 aeroplanes. Technical investigations 

revealed that these were due to failure of CB 

switches P/N CM3589–20, which are used to 

control the propeller de-icing circuit. 

Prompted by these events, ASI Aviation 

issued the applicable SB (as defined in this 

[EASA] AD) to provide instructions to 

replace the affected parts with serviceable 

parts. 

For the reasons described above, this 

[EASA] AD retains the requirements of EASA 

AD 2006–0134, which is superseded, 

expands the range of affected parts, and 

requires replacement of P/N CM3589–20 CB 

switches with improved design CB switches 

P/N 406E2450–00000–100. This [EASA] AD 

also replaces the previous life limit, 1 000 

flight hours (FH) for certain P/N CM3589–50 

CB switches, with a 6 year calendar time life 

limit, and also imposes that limit on the 

improved design CB switches. 

You may examine the MCAI in the 

AD docket at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2021– 

0714. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed ASI Aviation 

Service Bulletin No. F406–62, Revision 

01, dated December 14, 2018, which 

specifies inspecting the CB switches to 

determine the date code, replacing CB 

switches with certain date codes, and 

establishing a life limit of 6 years for the 

new CB switches. The FAA also 

reviewed ASI Aviation Service Bulletin 

No. F406–90, dated December 14, 2018, 

which specifies replacing the CB 

switches and establishing a life limit of 

6 years for the new CB switches. 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. 

FAA’s Determination 

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 is issuing 

this NPRM after determining the unsafe 

condition described previously is likely 

to exist or develop on other products of 

the same type design. 

Proposed AD Requirements 

This proposed AD would require 

accomplishing the actions specified in 

the service information already 

described, except as discussed under 

‘‘Differences Between this Proposed AD 

and the MCAI.’’ 

Differences Between This Proposed AD 

and the MCAI 

The MCAI allows installation of an 

affected CB switch until the airplane is 

modified. This proposed AD would 

prohibit installation of an affected CB 

switch as of the effective date of this 

AD. 

Costs of Compliance 

The FAA estimates that this AD, if 

adopted as proposed, would affect 4 

airplanes of U.S. registry. 

The FAA also estimates that it would 

take about 5 work-hours per airplane to 

comply with the inspection required by 

this proposed AD. The average labor 

rate is $85 per work-hour. 

Based on these figures, the FAA 

estimates the inspection cost of this 

proposed AD on U.S. operators to be 

$1,700 or $425 per airplane. 

In addition, the FAA estimates that 

each replacement required by this 

proposed AD would take about 1 workhour and require parts costing $350. 

Based on these figures, the FAA 

estimates the replacement cost of this 

proposed AD on U.S. operators to be 

$435 per airplane. 

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 


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Federal Register / Vol. 86, No. 164 / Friday, August 27, 2021 / Proposed Rules 48069 

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 above, 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: 

ASI Aviation (Type Certificate Previously 

Held by Reims Aviation S.A.): Docket 

No. FAA–2021–0714; Project Identifier 

2019–CE–016–AD. 

(a) Comments Due Date 

The FAA must receive comments on this 

airworthiness directive (AD) by October 12, 

2021. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to ASI Aviation (type 

certificate previously held by Reims Aviation 

S.A.) Model F406 airplanes, all serial 

numbers, certificated in any category. 

(d) Subject 

Joint Aircraft System Component (JASC) 

Code 2400, Electrical Power System. 

(e) Unsafe Condition 

This AD was prompted by mandatory 

continuing airworthiness information (MCAI) 

originated by an aviation authority of another 

country to identify and correct an unsafe 

condition on an aviation product. The MCAI 

describes the unsafe condition as failure of a 

circuit breaker (CB) switch. The FAA is 

issuing this AD to prevent smoke and 

burning smell in the cockpit caused by 

failure of CB switches. The unsafe condition, 

if not addressed, could result in reduced 

controllability of the airplane. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Inspection and Corrective Actions 

Within 200 hours time-in-service (TIS) or 

within 12 months, whichever occurs first 

after the effective date of this AD, prepare the 

airplane and gain access in accordance with 

steps 1 through 7 of the Accomplishment 

Instructions in ASI Aviation Service Bulletin 

No. F406–62, Revision 01, dated December 

14, 2018 (SB F406–62R1), and inspect each 

avionics bus CB switch part number (P/N) 

CM3589–50 to identify the date code. 

(1) If a CB switch does not have a date 

code, before further flight, remove the CB 

switch from service and install CB switch P/ 

N 4061–2400–1 in accordance with steps 9 

through 14 of the Accomplishment 

Instructions in SB F406–62R1. 

(2) If a CB switch has a date code earlier 

than 0434, before the CB switch exceeds 

1,000 hours TIS since first installation on an 

airplane, remove the CB switch from service 

and install CB switch P/N 4061–2400–1 in 

accordance with steps 9 through 14 of the 

Accomplishment Instructions in SB F406– 

62R1. 

(3) If a CB switch has a date code 0434 or 

later, before the CB switch exceeds 6 years 

since first installation on an airplane or 

within 12 months after the effective date of 

this AD, whichever occurs later, remove the 

CB switch from service and install CB switch 

P/N 4061–2400–1 in accordance with steps 9 

through 14 of the Accomplishment 

Instructions in SB F406–62R1. 

(h) Replacements 

Within 200 hours TIS or within 12 months, 

whichever occurs first after the effective date 

of this AD, remove each CB switch P/N 

CM3589–20 from service, re-identify the CB 

panel, and install CB switches with P/N 

406E2450–00000–100 in accordance with 

Part 1, steps 1 through 13, of the 

Accomplishment Instructions in ASI 

Aviation Service Bulletin No. F406–90, dated 

December 14, 2018 (SB F406–90). 

(i) Life Limit 

Before exceeding 6 years since first 

installation on an airplane and thereafter at 

intervals not to exceed 6 years, remove each 

CB switch P/N 4061–2400–1 and P/N 

406E2450–00000–100 from service and 

replace it in accordance with steps 9 through 

14 of the Accomplishment Instructions in SB 

F406–62R1 or Part 1, steps 1 through 13, of 

the Accomplishment Instructions in SB 

F406–90, as applicable. 

(j) Parts Installation Prohibition 

As of the effective date of this AD, do not 

install a CB switch P/N CM3589–50 or P/N 

CM3589–20 on any airplane. 

(k) Credit for Previous Actions 

You may take credit for the actions 

required by paragraph (g) of this AD if you 

performed those actions before the effective 

date of this AD using Reims Aviation 

Industries Service Bulletin No. F406–62, 

dated March 8, 2006. 

(l) Alternative Methods of Compliance 

(AMOCs) 

(1) The Manager, General Aviation & 

Rotorcraft Section (AIR–732), 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 certification office, 

send it to the attention of the person 

identified in Related Information or email 9- 

AVS-AIR-730-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. 

(m) Related Information 

(1) For more information about this AD, 

contact Gregory Johnson, Aviation Safety 

Engineer, AIR–732 International Validation 

Section FAA, 901 Locust, Room 301, Kansas 

City, MO 64106–2641; phone: (720) 626– 

5462; email: gregory.johnson@faa.gov. 

(2) Refer to European Aviation Safety 

Agency (EASA) AD 2019–0015, dated 

January 29, 2019, for more information. You 

may examine the EASA AD in the AD docket 

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

for and locating it in Docket No. FAA–2021– 

0714. 

(3) For service information identified in 

this AD, contact ASI Aviation, Ae ́rodrome de 

Reims Prunay, 51360 Prunay, France; 

telephone: +33 3 26 48 46 84; fax: +33 3 26 

49 18 57; email: contact@asi-aviation.fr; 

website: https://asi-aviation.fr/pageAccueil.html. You may view this referenced 

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 (816) 329–4148. 

Issued on August 20, 2021. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2021–18386 Filed 8–26–21; 8:45 am] 

BILLING CODE 4910–13–P 


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