10958 Federal Register / Vol. 87, No. 39 / Monday, February 28, 2022 / Rules and Regulations 

(i) European Union Aviation Safety Agency 

(EASA) AD 2021–0181, dated July 30, 2021. 

(ii) [Reserved] 

(3) For EASA AD 2021–0181, contact 

EASA, Konrad-Adenauer-Ufer 3, 50668 

Cologne, Germany; telephone +49 221 8999 

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

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

EASA AD on the EASA website at https://

ad.easa.europa.eu. 

(4) You may view this material at the FAA, 

Airworthiness Products Section, Operational 

Safety Branch, 2200 South 216th St., Des 

Moines, WA. For information on the 

availability of this material at the FAA, call 

206–231–3195. 

(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 February 17, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–04147 Filed 2–25–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2020–0345; Product 

Identifier 2019–NM–154–AD; Amendment 

39–21951; AD 2022–04–09] 

RIN 2120–AA64 

Airworthiness Directives; AVOX 

System Inc. (Formerly Scott Aviation) 

Oxygen Cylinder and Valve 

Assemblies and Oxygen Valve 

Assemblies 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: The FAA is adopting a new 

airworthiness directive (AD) for certain 

AVOX System Inc. (formerly Scott 

Aviation) oxygen cylinder and valve 

assemblies, and oxygen valve 

assemblies, installed on but not limited 

to various transport airplanes. This AD 

was prompted by reports of cylinder 

and valve assemblies having oxygen 

leakage from the valve assembly vent 

hole, caused by the absence of a guide 

that maintains appropriate spacing 

between certain parts. This AD requires 

an inspection of the oxygen valve 

assemblies, and oxygen cylinder and 

valve assemblies, to determine the serial 

number of the valve, cylinder, and 

entire assembly. For assemblies and 

parts with certain serial numbers, this 

AD requires a detailed inspection for 

correct spacing of the gap between the 

bottom of the packing retainer and top 

of the valve body on the assemblies, and 

replacement of assemblies having 

unacceptable gaps. The FAA is issuing 

this AD to address the unsafe condition 

on these products. 

DATES: This AD is effective April 4, 

2022. 

The Director of the Federal Register 

approved the incorporation by reference 

of certain publications listed in this AD 

as of April 4, 2022. 

ADDRESSES: For service information 

identified in this final rule, contact 

AVOX Systems Inc., 225 Erie Street, 

Lancaster, NY 14086; telephone 716– 

683–5100; internet https://

www.safranaerosystems.com. 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. 

It is also available at https://

www.regulations.gov by searching for 

and locating Docket No. FAA–2020– 

0345. 

Examining the AD Docket 

You may examine the AD docket at 

https://www.regulations.gov by 

searching for and locating Docket No. 

FAA–2020–0345; 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: 

Elizabeth Dowling, Aerospace Engineer, 

Mechanical Systems and Administrative 

Services Section, FAA, New York ACO 

Branch, 1600 Stewart Avenue, Suite 

410, Westbury, NY 11590; telephone 

516–228–7300; email 9-avs-nyaco-cos@

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 certain AVOX System Inc. 

(formerly Scott Aviation) oxygen 

cylinder and valve assemblies, and 

oxygen valve assemblies, installed on 

but not limited to various transport 

airplanes. The NPRM published in the 

Federal Register on May 1, 2020 (85 FR 

25353). The NPRM was prompted by 

reports of cylinder and valve assemblies 

having oxygen leakage from the valve 

assembly vent hole, caused by the 

absence of a guide that maintains 

appropriate spacing between certain 

parts. In the NPRM, the FAA proposed 

to require an inspection of the oxygen 

valve assemblies, and oxygen cylinder 

and valve assemblies, to determine the 

serial number of the valve, cylinder, and 

entire assembly. For assemblies and 

parts with certain serial numbers, the 

NPRM proposed to require a detailed 

inspection for correct spacing of the gap 

between the bottom of the packing 

retainer and top of the valve body on the 

assemblies, and replacement of 

assemblies having unacceptable gaps 

(removing affected assemblies and 

installing serviceable assemblies). The 

NPRM also proposed to require 

reporting and returning of affected parts 

to the manufacturer. The FAA is issuing 

this AD to address oxygen leakage from 

the cylinder, which could result in 

decreased or insufficient oxygen supply 

during a depressurization event; and 

heating or flow friction, which could 

cause an ignition event in the valve 

assembly. 

Discussion of Final Airworthiness 

Directive 

Comments 

The FAA received comments from 

one commenter, Air Line Pilots 

Association, International (ALPA), who 

supported the NPRM without change. 

The FAA received additional 

comments from five commenters, 

including American Airlines (AAL), 

Delta Air Lines (DAL), FedEx Express 

(FedEx), United Airlines (UAL), and an 

individual. The following presents the 

comments received on the NPRM and 

the FAA’s response to each comment. 

Request To Revise Applicability 

AAL and UAL suggested revising the 

applicability statement to include more 

aircraft manufacturers and models. AAL 

suggested adding all airplane models 

that affected assemblies could be 

installed on, in particular, Boeing Model 

737–NG (Next Generation models are 

737–600, –700, –700C, –800, –900, and 

–900ER series), 737–MAX, 777–200, and 

777–300 series airplanes. UAL also 

suggested adding Model 737–NG 

airplanes. AAL stated that the 

applicability statement as proposed in 

the NPRM could mislead operators into 

believing that the AD would apply only 

to the airplanes identified in paragraphs 

(c)(1) through (12) of the AD. UAL 

believed the suggested change will be 

beneficial and assist operators in 

determining if their fleets are affected. 


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The FAA disagrees with the 

commenters’ request. The FAA does not 

have a comprehensive list of all possible 

affected aircraft. To address the 

incomplete list, paragraph (c) of this AD 

identifies specific airplane models in 

paragraph (c) of this AD, but also notes 

that the assemblies are ‘‘not limited to.’’ 

The FAA has not changed the AD in this 

regard. 

Request To Revise Compliance Time for 

Parts 

AAL stated that the 60-day 

compliance time should apply only to 

valve assemblies that are installed on 

the aircraft and not ones in stock. AAL 

believes the unsafe condition only exists 

when an assembly is installed on an 

airplane, and for those assemblies that 

are not installed on an airplane, the 

proposed requirements in paragraph (k) 

of the proposed AD would ensure that 

the unsafe condition is addressed before 

that assembly is installed on an aircraft. 

The FAA disagrees with the request to 

revise the compliance time. The FAA 

agrees that an affected spare part that is 

uninstalled and stored off an aircraft 

would not cause an unsafe condition on 

an aircraft. The 60-day compliance time 

applies to parts already installed on an 

aircraft, and paragraph (k) requires that 

action to be done on affected spare parts 

before installation, which could result 

in a spare part being inspected before 

the 60-day compliance time. In 

developing the compliance time for this 

AD, the FAA considered the urgency 

associated with the subject unsafe 

condition and the availability of 

required parts. The FAA determined 

that the 60-day compliance time for 

parts already installed on an aircraft is 

appropriate for accomplishing the 

actions required by this AD while 

maintaining an adequate level of safety. 

The FAA has not changed this AD in 

this regard. 

Request To Remove Inspection for 

Serial Numbers or Include Only Valve 

P/Ns 

AAL requested that the inspection to 

verify the serial number of the oxygen 

cylinder and entire assembly not be 

required. DAL requested that paragraphs 

(c), (h), (i), and (k) of the proposed AD 

be revised to remove reference to 

cylinder part numbers (P/Ns) and apply 

only to valve assembly P/Ns. AAL stated 

that it reviewed the service information 

and it seems that the defective part is 

only the valve assembly or ‘‘hand 

valve.’’ DAL also reasoned that the 

unsafe condition applies only to the 

valve assembly and not the cylinder. 

AAL then reasoned that the inspection 

to verify the serial number should apply 

only to the valve assembly or ‘‘hand 

valve.’’ AAL also stated that paragraph 

(i) of the proposed AD also seems to 

require the actions of paragraph (h)(1) 

through (3) of the proposed AD if a 

serial number of a cylinder was affected 

and a valve assembly not affected, even 

though it seems that it should not 

require those actions. 

The FAA disagrees with the request. 

The parts of the oxygen cylinder and 

valve assemblies are interrelated, and 

valves from matched sets could have fitup issues between parts or be mixed up 

or swapped during maintenance 

operations. The serial number 

inspection as proposed would address 

this interchangeability. The valve and 

cylinder that are part of those 

assemblies must also be inspected to 

address the unsafe condition, not just 

the assemblies themselves. Therefore, 

the FAA specifies to inspect the oxygen 

valve assemblies, and oxygen cylinder 

and valve assemblies, to determine the 

serial number of the valve, cylinder, and 

entire assembly. The FAA has not 

changed this AD in this regard. 

Request To Clarify Which Components 

Need To Be Identified 

UAL requested a change to the 

wording of which components need the 

serial number inspection. UAL stated 

that the statement in paragraph (h) of 

the proposed AD can be misconstrued 

as requiring that each of the three 

components (valve, cylinder, and entire 

assembly) be inspected individually for 

suspect serial numbers. UAL inferred 

that the intention is to inspect for the 

serial number of the entire cylinder and 

valve assembly, and not the individual 

components. UAL also stated that, for 

new oxygen cylinder assemblies from 

AVOX, there are individual placards 

that itemize the P/N and serial number 

for each component, and that for some 

cylinder assemblies, the serialization of 

the entire cylinder and valve assembly 

is nearly identical in format to the 

serialization of sub-component valve 

assemblies, which could lead to 

inaccurate reporting of results. The FAA 

infers that UAL suggested that the 

relevant numbers on the placards could 

be confused with other numbers. 

The FAA disagrees. Each part and 

assembly stated in paragraph (h) of this 

AD are interrelated and must be 

inspected. The valve and cylinder 

components that are part of those 

assemblies must also be inspected for 

serial numbers, not just the assemblies 

themselves. If the serial number 

markings are unclear or missing, the 

service information contains 

information on identifying the parts and 

part assemblies. The FAA has not 

changed this AD in this regard. 

Request To Revise Conditions for Gap 

Inspection and Related Actions 

AAL and DAL requested changes to 

address concerns about what actions are 

required if a part is missing a blue dot. 

DAL stated that it seems best to prohibit 

all affected serial numbers to avoid a 

case where an inspected and marked 

part is installed, but the blue dot fades. 

AAL pointed to paragraph (i) of the 

proposed AD that would clarify that 

only the affected serial numbers of the 

valve assembly would need additional 

work, and, for valve assemblies marked 

with a blue dot, a detailed inspection for 

correct spacing of the gap between the 

bottom of the packing retainer and top 

of the valve body would not be required. 

AAL stated that, as written, the 

proposed AD seems to suggest that an 

inspection of the gap would be required 

regardless of the presence of a blue dot. 

The FAA disagrees with the request. 

The service information specifies that if 

there is a doubt on the condition of a 

part, such as missing serial numbers or 

a blue dot not definitively identified, 

then the follow-on inspections are 

required to ensure that no discrepant or 

affected part is missed. Paragraph (k) of 

this AD prohibits installation of 

assemblies with affected serial numbers 

unless the actions of paragraph (i) of 

this AD are accomplished. The FAA has 

not changed this AD in this regard. 

Request To Remove Inspection Report 

Requirement 

DAL requested that the compliance 

times for the inspection report be 

removed from paragraph (j)(1) of the 

proposed NPRM, and if not, the 

inspection report itself be removed. 

AAL requested removing the proposed 

requirement to submit an inspection 

report after accomplishing the 

requirements (i.e., gap inspection) of 

paragraph (i) of the proposed AD. FedEx 

stated reporting should not be required 

for units that pass the inspection, and 

that sending units that failed the 

inspection to the vendor should be 

sufficient for reporting those failures. 

FedEx noted that any reporting 

requirements should consider the 

difficulties in reporting findings in a 

short period of time and noted that the 

inspector might not have access to the 

internet, email, and a device capable of 

printing and scanning. FedEx opined 

that its proposal would maintain 

accurate reporting and accommodate the 

realities of a global workplace. AAL and 

DAL stated that the reporting seems 

unnecessary and does not contribute to 

any additional level of safety. AAL 


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added that the NPRM would give 

operators the responsibility of ensuring 

that any affected part is returned to the 

manufacturer, and asserted that an 

equivalent level of safety would be 

maintained even if the reporting is not 

accomplished. DAL reasoned that if a 

cylinder valve assembly is 

unacceptable, it would be in the 

operator’s best interest to report that 

finding to AVOX anyways so that it can 

receive a replacement assembly. 

The FAA disagrees. In this case, the 

inspection results need to be reported to 

assist in tracking affected parts that are 

in circulation. In addition, reporting all 

findings gives assurance that an 

inspection was performed on an 

assembly with a given serial number. 

The FAA has not changed this AD in 

this regard. 

Request To Remove Compliance Time 

for Returning Parts 

AAL, DAL, and UAL requested 

revising paragraph (j)(2) of the proposed 

AD to remove a compliance time for 

returning discrepant parts to the 

manufacturer. AAL stated that a 

compliance time would not contribute 

to the level of safety. AAL also stated 

that all discrepant assemblies would be 

returned in a timely manner that is 

sufficient to the operator. DAL stated 

that it would be an unnecessary burden 

on operators to wait for AVOX’s 

response before sending an 

unacceptable or discrepant part back 

within the compliance time in exchange 

for a free-of-charge replacement. DAL 

also stated that it would also be in the 

operator’s best interest to send in the 

assembly so that it can qualify for a freeof-charge replacement if AVOX 

determines the part is unacceptable or 

discrepant. UAL stated it also believes 

the instruction to contact AVOX for 

shipping instructions could impede 

compliance with the 30-day limit to 

ship discrepant parts back to AVOX. 

UAL also stated that it wants to know 

how, for accurate AD-compliance 

reporting, it would be determined that 

a part is being shipped back as a result 

of this finding from AD-required 

inspections, or as a result of other, 

normal repair order processes. 

The FAA agrees to clarify. Paragraph 

(j)(2) of this AD requires returning the 

assembly to the manufacturer in 

accordance with paragraph 3.D.(2) or 

3.D.(3), as applicable, of the applicable 

service information. However, the 

service information does not include 

instructions to wait for a response from 

AVOX before returning the part. In 

addition, the FAA has revised paragraph 

(j)(2) of this AD to clarify that contacting 

AVOX for shipping instructions in not 

required. AVOX is tracking parts that 

are returned to it during 

accomplishment of the AD for data 

collection or analysis of manufacturing 

issues, and AVOX is also reconditioning parts where possible. The 

FAA determined that having a 30-day 

compliance time for returning the part 

after an inspection finding is 

appropriate for this AD. However, under 

the provisions of paragraph (m) of this 

AD, an operator may request an 

approval of an alternative method of 

compliance (AMOC). The FAA has not 

changed this AD in this regard. 

Request To Allow Later Revisions of 

Service Information 

AAL requested that all the references 

to the AVOX service information be 

revised to allow use of subsequent 

revisions. AAL reasoned that this 

revision would reduce the number of 

AMOC requests each time a referenced 

service bulletin is revised. 

The FAA disagrees. In an AD, the 

FAA may not refer to any document that 

does not yet exist. In general terms, the 

FAA is required by the Office of the 

Federal Register (OFR) regulations for 

approval of materials incorporated by 

reference, as specified in 1 CFR 51.1(f), 

to either publish the service document 

contents as part of the actual AD 

language; or submit the service 

document to the OFR for approval as 

referenced material, in which case the 

FAA may only refer to such material in 

the text of an AD. The AD may refer to 

the service document only if the OFR 

approved it for incorporation by 

reference. See 1 CFR part 51. The FAA 

disagrees with revising the AD to 

include specific airplane models based 

on the corresponding service 

information because the agency does not 

have a comprehensive list of the 

applicable aircraft to which specific 

AVOX service information could apply. 

The FAA has not changed this AD in 

this regard. 

Request To Clarify AD Applicability 

With Reference to Service Information 

A commenter requested clarifying 

paragraph (c) of the proposed AD by 

including reference to the service 

information that was identified in 

paragraph (h) of the proposed AD. The 

commenter suggested revising the 

paragraph so that the applicability 

would include information on the 

service information definition of the 

affected units. AAL also requested 

adding the airplane configuration 

information in the text of the AD to add 

further clarification to operators and 

release the technical data in a more 

organized fashion. 

The FAA disagrees. The definition of 

the affected units does not need to be 

moved to paragraph (c) of the AD. The 

effectivity of the service information is 

limited to specific airplane models, but 

the applicability of this AD applies to 

all aircraft. Because the affected parts 

could be installed on additional aircraft 

models, the FAA has determined that 

the affected parts could later be 

installed on aircraft that were initially 

delivered with acceptable parts, thereby 

subjecting those aircraft to the unsafe 

condition. The FAA has not changed 

this AD in this regard. 

Request To Revise Compliance Time for 

Parts Identification 

DAL and UAL requested revising the 

compliance time proposed in paragraph 

(h) of the proposed NPRM. DAL and 

UAL stated that since many operators 

have parked their aircraft or severely 

reduced usage of aircraft, an extension 

of the compliance time (either with 

additional calendar days or adding an 

option for flight hours and flight cycles), 

would allow operators additional time 

for compliance. UAL also stated that the 

supply chain could be affected due to 

potential increased shipping time and 

workforce reductions. 

The FAA disagrees with the request to 

extend the compliance time. The FAA 

acknowledges the effects that the 

pandemic response might have on 

operators’ fleet use, supply chain, and 

maintenance personnel. In developing 

an appropriate compliance time for this 

action, the FAA considered the degree 

of urgency associated with addressing 

the subject unsafe condition, the 

manufacturer’s recommendation for an 

appropriate compliance time, and the 

practical aspect of accomplishing the 

required inspection within a period of 

time that corresponds to the normal 

scheduled maintenance for most 

affected operators. In addition, the FAA 

notes that some aircraft may have been 

in service during the pandemic and 

must comply within the required 

compliance time. Operators do have the 

option to inspect the airplane before the 

first flight following storage if the 

airplane is in storage for more than 27 

months. However, under the provisions 

of paragraph (m) of this AD, the FAA 

will consider requests for an extension 

of the compliance time if sufficient data 

are submitted to substantiate that the 

new compliance time would provide an 

acceptable level of safety. The FAA has 

not changed this AD in this regard. 

Request To Allow Use of Alternatives 

for Parts Marking 

FedEx requested that the specification 

to use oil-based blue ink markers be 


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modified to allow alternative methods 

and colors such as black indelible ink. 

FedEx stated that oil-based blue paint 

markers are not readily available or kept 

in stock regularly. FedEx suggested that 

a list of part numbers for approved, 

aircraft grade, oil-based paint be 

provided. 

The FAA disagrees. While the FAA 

realizes this is a limitation, there must 

be one standard to help avoid 

confusion. The procedures required by 

this AD specify actions based on the 

presence or absence of a blue dot in a 

specific location. The FAA has not seen 

any difficulties in obtaining the paint 

markers. However, under the provisions 

of paragraph (m) of this AD, any person 

may request an approval of an AMOC. 

The FAA has not revised this AD in this 

regard. 

Request To Allow Alternative Means of 

Measuring Gaps 

FedEx requested that the proposed 

AD be revised to allow use of feeler 

gauges, calipers, and other means of 

measuring the gap in imperial units of 

measure. FedEx stated that the service 

information specifies use of pin gauges 

that are made for metric units of 

measure, and that acquiring those 

metric pin gauges is an extra expense 

and logistical complication. FedEx 

recommended adding a tolerance to the 

gap measurement and specifying a 

fractional imperial measure (3⁄32-inch) 

that is close to the metric unit specified. 

FedEx suggested that if a tolerance or 

other measurement is not added, then a 

manufacturer part number (MPN) for a 

specific tool or supplier should be 

provided. 

The FAA disagrees. Using other 

means of measuring could introduce or 

increase variables that could affect the 

accuracy of the measurement. The FAA 

understands that not everyone has the 

same resources, tools, or supplies; 

however, the FAA also understands that 

this means of measurement is easily 

accessible. Under the provisions of 

paragraph (m) of this AD, operators may 

request approval of an AMOC if 

sufficient data are submitted to 

substantiate that the tolerance would 

provide an acceptable level of safety. 

The FAA has not changed this AD in 

this regard. 

Request To Revise Procedure for 

Shipping an Assembly 

FedEx requested that the proposed 

AD be revised to allow operators to use 

their own procedures for shipping 

dangerous goods such as unopened 

cylinder valve assemblies (CVAs) 

instead of the procedure specified in the 

service information. FedEx explained 

that it has established and accepted 

procedures for shipping dangerous 

goods, and that the disposition of an 

unopened CVA would be done by a 

department separate from the one doing 

the inspection. FedEx stated that 

following the procedures in the service 

information would require additional 

coordination time, and that the wording 

of the procedures would not function 

properly with its AD compliance 

mechanisms. 

The FAA agrees to clarify. The design 

approval holder (DAH) of the affected 

valve assemblies has specified a method 

for shipping, or returning, an unopened 

CVA that has been found to be 

unacceptable or discrepant, specifically 

a shipping method that is compliant 

with DOT standard HM–224B. If FedEx 

has procedures that are compliant with 

DOT standard HM–224B, then those 

procedures are acceptable for 

compliance with this AD. For 

procedures that are not compliant with 

DOT standard HM–224B, under the 

provisions of paragraph (m) of this AD, 

the FAA will consider requests for an 

AMOC. The FAA has not changed this 

AD in this regard. 

Request for Clarification on 

Applicability of AD 

FedEx requested clarification on 

whether the proposed AD is written 

‘‘against’’ the MPN or the serial numbers 

within that MPN. FedEx explained the 

effects on the operator’s workload and 

also on the operational impact of a 

unit’s overhaul cycle in conjunction 

with a 60-day compliance time and the 

scope of the applicability. FedEx added 

that a 180-day compliance time would 

be more reasonable. 

The FAA agrees to clarify. The 

applicability of this AD is written 

against the MPN and specific serial 

numbers, in addition to manufacture 

dates of the assemblies. The FAA 

disagrees to revise the compliance time 

because the FAA has determined that 

requirement based on a risk calculation. 

The FAA has not changed this AD in 

that regard. 

Request To Clarify Requirement if 

Component Number(s) Cannot Be 

Determined 

UAL requested clarification on what 

actions are required in the event the 

P/N or serial number information 

cannot be determined. UAL stated that 

as a result of in-service activity, that 

information might be illegible, 

unintentionally obliterated, or missing 

from the placard. UAL added that under 

its normal practices, whenever a part or 

serial number cannot be determined, the 

part is considered suspect, made 

unserviceable, and removed from 

service. UAL stated that, when the P/N 

of the entire cylinder and valve 

assembly can be determined but not the 

serial number, and the date of 

manufacture is between January and 

November 2018, it wants to still be able 

to establish conformity by inspecting for 

the presence of the blue dot and 

accomplish the applicable service 

information instruction if the blue dot is 

missing. UAL also stated that depending 

on the FAA’s response to this request, 

it may apply for an AMOC. 

The FAA agrees to clarify. The service 

information states to inspect for the 

manufacturing date, serial number, and 

the presence of a blue dot. The service 

information then states that if there is 

doubt or a determination cannot be 

made (such as the numbers or dot is not 

clearly identified), to proceed with the 

follow-on inspection for proper gap 

spacing (this follow-on inspection is 

required by paragraph (i) of this AD). 

The FAA has not changed this AD in 

this regard. 

Request for Clarification on 

Compliance Time and Method for 

Inspection Report 

UAL requested clarification on how a 

30-day requirement for the inspection 

report was determined, and if a 

‘‘comprehensive’’ report is acceptable. 

UAL stated that it understands the need 

for the information gathered from the 

reports; however, it does not understand 

why or how a 30-day compliance time 

was established. UAL also stated that it 

assumed that reporting of the results 

should be done as a single, 

comprehensive report and not piecewise (individually for each assembly or 

aircraft), and that the report does not 

need to be an exact copy of the report 

form in the service information. 

The FAA agrees to clarify. The FAA 

determined that the 30-day compliance 

time is appropriate for this AD. Also, 

the manufacturer is collecting 

information for analysis of 

manufacturing issues. The format of the 

report may be done as UAL assumed, as 

long as all documents are labeled 

correctly. However, under the 

provisions of paragraph (m) of this AD, 

an operator may request an approval of 

an AMOC. The FAA has not changed 

this AD in this regard. 

Request To Provide Clarification on 

Reporting Form 

UAL requested clarification on the 

definition of ‘‘manufacture date’’ in a 

recording column of a report form in the 

service information. UAL stated that it 

is implied that ‘‘manufacture date’’ in 

that column is the manufacture date of 


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the entire cylinder and valve assembly 

and not of the valve assembly. 

The FAA agrees to clarify. The 

‘‘manufacturer date’’ is not limited to 

the date of the entire cylinder and valve 

assembly, but is the manufacture date of 

each part or assembly that might be 

recorded in the inspection report, such 

as the assemblies listed in Appendix 1 

of the service information. The FAA has 

not changed this AD in this regard. 

Conclusion 

The FAA reviewed the relevant data, 

considered any comments received, and 

determined that air safety requires 

adopting this AD as proposed. Except 

for minor editorial changes, this AD is 

adopted as proposed in the NPRM. 

None of the changes will increase the 

economic burden on any operator. 

Related Service Information Under 1 

CFR Part 51 

The FAA reviewed AVOX Systems 

Inc. Alert Service Bulletins 10015804– 

35–01, Revision 02, dated October 16, 

2019; 10015804–35–02, Revision 2, 

dated October 31, 2019; and 10015804– 

35–03, Revision 02, dated October 15, 

2019. This service information describes 

procedures for an inspection to 

determine the serial numbers of the 

oxygen cylinder and valve assemblies, 

and the oxygen valve assemblies, a 

detailed inspection for correct spacing 

of the gap between the bottom of the 

packing retainer and top of the valve 

body on the assemblies, parts marking, 

inspection report, and return of parts to 

the manufacturer. These documents are 

distinct since they apply to different 

assembly part numbers. 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 ADDRESSES. 

Costs of Compliance 

The FAA estimates that this AD 

affects up to 3,034 oxygen cylinder and 

valve assemblies, and oxygen valve 

assemblies, installed on various 

transport category airplanes of U.S. 

registry. 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 

Serial number inspection ............................... 1 work-hour × $85 per hour = $85 ............... None ................. $85 $257,890 

Reporting ....................................................... 1 work-hour × $85 per hour = $85 ............... 0 ....................... 85 257,890 

The FAA estimates the following 

costs to do any necessary follow-on 

actions that would be required based on 

the results of the inspection. The FAA 

has no way of determining the number 

of aircraft that might need these actions: 

ON-CONDITION COSTS * 

Action Labor cost Parts cost Cost per 

product 

Detailed inspection ...................................................... 1 work-hour × $85 per hour = $85 ............................. None ................. $85 

* The FAA has received no definitive data on the cost of on-condition replacements. 

According to the manufacturer, some 

or all of the costs of this AD may be 

covered under warranty, thereby 

reducing the cost impact on affected 

operators. The FAA does not control 

warranty coverage for affected operators. 

As a result, the FAA has included all 

known costs in the cost estimate. 

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 take 

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 

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 


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Federal Register / Vol. 87, No. 39 / Monday, February 28, 2022 / Rules and Regulations 10963 

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: 

2022–04–09 AVOX Systems Inc. (formerly 

Scott Aviation): Amendment 39–21951; 

Docket No. FAA–2020–0345; Product 

Identifier 2019–NM–154–AD. 

(a) Effective Date 

This airworthiness directive (AD) is 

effective April 4, 2022. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to AVOX Systems Inc. 

(formerly Scott Aviation) oxygen cylinder 

and valve assemblies having part number 

(P/N) 89794077, 89794015, 891511–14, 

806835–01, 807982–01, or 808433–01; and 

oxygen valve assemblies (body and gage 

assemblies) having P/N 807206–01. These 

assemblies might be installed on, but not 

limited to, the aircraft identified in 

paragraphs (c)(1) through (12) of this AD, 

certificated in any category. 

(1) Airbus SAS Model A300 B2–1A, B2– 

1C, B2K–3C, B2–203, B4–2C, B4–103, and 

B4–203 airplanes. 

(2) Airbus SAS Model A300 B4–601, B4– 

603, B4–620, B4–622, B4–605R, B4–622R, 

F4–605R, F4–622R, and C4–605R Variant F 

airplanes. 

(3) Airbus SAS Model A310–203, –204, 

–221, –222, –304, –322, –324, and –325 

airplanes. 

(4) Airbus SAS Model A318–111, –112, 

–121, and –122 airplanes. 

(5) Airbus SAS Model A319–111, –112, 

–113, –114, –115, –131, –132, –133, and 

–151N airplanes. 

(6) Airbus SAS Model A320–211, –212, 

–214, –216, –231, –232, –233, –251N, –252N, 

–253N, –271N, –272N, and –273N airplanes. 

(7) Airbus SAS Model A321–111, –112, 

–131, –211, –212, –213, –231, –232, –251N, 

–252N, –253N, –271N, –272N, –251NX, 

–252NX, –253NX, –271NX, and –272NX 

airplanes. 

(8) Airbus SAS Model A330–201, –202, 

–203, –223, –243, –301, –302, –303, –321, 

–322, –323, –341, –342, –343, and –941 

airplanes. 

(9) Airbus Model A340–211, –212, –213, 

–311, –312, –313, –541, and –642 airplanes. 

(10) ATR—GIE Avions de Transport 

Re ́gional Model ATR42–200, –300, –320, and 

–500 airplanes. 

(11) ATR—GIE Avions de Transport 

Re ́gional Model ATR72–101, –102, –201, 

–202, –211, –212, and –212A airplanes. 

(12) The Boeing Company Model 747–8 

series airplanes. 

(d) Subject 

Air Transport Association (ATA) of 

America Code 35, Oxygen System. 

(e) Unsafe Condition 

This AD was prompted by reports of 

cylinder and valve assemblies having oxygen 

leakage from the valve assembly vent hole, 

caused by the absence of a guide that 

maintains appropriate spacing between 

certain parts. The FAA is issuing this AD to 

address oxygen leakage from the cylinder, 

which could result in decreased or 

insufficient oxygen supply during a 

depressurization event; and heating or flow 

friction, which could cause an ignition event 

in the valve assembly. 

(f) Compliance 

Comply with this AD within the 

compliance times specified, unless already 

done. 

(g) Definition of Detailed Inspection 

For the purposes of this AD, a detailed 

inspection is an intensive examination of a 

specific item, installation, or assembly to 

detect damage, failure, or irregularity. 

Available lighting is normally supplemented 

with a direct source of good lighting at an 

intensity deemed appropriate. Inspection 

aids such as mirror, magnifying lenses, etc., 

may be necessary. Surface cleaning and 

elaborate procedures may be required. 

(h) Identification of Affected Cylinder and 

Valve Assemblies 

Within 60 days after the effective date of 

this AD, inspect the oxygen valve assemblies, 

and oxygen cylinder and valve assemblies, to 

determine if the serial numbers of the valve, 

cylinder, and entire assembly, are listed in 

Appendix 1, ‘‘Affected Shipments,’’ of the 

applicable service information identified in 

paragraphs (h)(1) through (3) of this AD. A 

review of airplane maintenance records is 

acceptable in lieu of this inspection if the 

serial numbers can be conclusively 

determined from that review. 

(1) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–01, Revision 02, dated 

October 16, 2019. 

(2) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–02, Revision 2, dated 

October 31, 2019. 

(3) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–03, Revision 02, dated 

October 15, 2019. 

(i) Inspection of the Gap, Parts Marking 

Actions, and Replacement 

If, during any inspection or records review 

required by paragraph (h) of this AD, any 

oxygen valve assembly, valve or cylinder of 

an oxygen cylinder and valve assembly, or 

oxygen cylinder and valve assembly having 

an affected serial number is found: Before 

further flight, do a detailed inspection for 

correct spacing of the gap between the 

bottom of the packing retainer and top of the 

valve body, in accordance with paragraph 

3.C. of the Accomplishment Instructions of 

the applicable service information identified 

in paragraphs (h)(1) through (3) of this AD. 

(1) If the gap is found to be acceptable, as 

defined in the applicable service information 

identified in paragraphs (h)(1) through (3) of 

this AD, before further flight, do the parts 

marking actions in accordance with 

paragraph 3.D.(1) of the Accomplishment 

Instructions of the applicable service 

information identified in paragraphs (h)(1) 

through (3) of this AD. 

(2) If the gap is found to be unacceptable, 

as defined in the applicable service 

information identified in paragraphs (h)(1) 

through (3) of this AD, before further flight, 

remove the affected assembly, in accordance 

with paragraphs 3.D.(2) or 3.D.(3), as 

applicable, of the Accomplishment 

Instructions of the applicable service 

information identified in paragraphs (h)(1) 

through (3) of this AD; and replace with a 

serviceable assembly. 

(j) Reporting and Return of Parts 

(1) Report the results of the inspection 

required by paragraph (i) of this AD within 

the applicable time specified in paragraph 

(j)(1)(i) or (ii) of this AD. Report the results 

in accordance with paragraph 3.D.(1)(a) of 

the Accomplishment Instructions of the 

applicable service information identified in 

paragraphs (h)(1) through (3) of this AD. 

(i) If the inspection was done on or after 

the effective date of this AD: Submit the 

report within 30 days after the inspection. 

(ii) If the inspection was done before the 

effective date of this AD: Submit the report 

within 30 days after the effective date of this 

AD. 

(2) If, during the inspection required by 

paragraph (i) of this AD, any gap is found to 

be unacceptable, within the applicable time 

specified in paragraph (j)(2)(i) or (ii) of this 

AD, return the assembly to the manufacturer 

in accordance with paragraph 3.D.(2) or 

3.D.(3), as applicable, of the Accomplishment 

Instructions of the applicable service 

information identified in paragraphs (h)(1) 

through (3) of this AD, except you are not 

required to contact AVOX for shipping 

instructions. 

(i) If the inspection was done on or after 

the effective date of this AD: Return the 

assembly within 30 days after the inspection. 

(ii) If the inspection was done before the 

effective date of this AD: Return the assembly 

within 30 days after the effective date of this 

AD. 

(k) Parts Installation Limitation 

As of the effective date of this AD, no 

AVOX Systems Inc. oxygen valve assembly, 

or valve or cylinder that is part of an oxygen 

cylinder and valve assembly, or oxygen 

cylinder and valve assembly having an 

affected serial number identified in 

Appendix 1, ‘‘Affected Shipments,’’ of any 

AVOX Systems Inc. service information 


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10964 Federal Register / Vol. 87, No. 39 / Monday, February 28, 2022 / Rules and Regulations 

identified in paragraphs (h)(1) through (3) of 

this AD may be installed on any airplane 

unless the requirements of paragraph (i) of 

this AD have been accomplished on that 

affected assembly. 

(l) Credit for Previous Actions 

This paragraph provides credit for the 

actions specified in paragraphs (h) or (i) of 

this AD, if those actions were performed 

before the effective date of this AD using the 

service information specified in paragraphs 

(l)(1) through (5) of this AD. 

(1) AVOX Systems Inc. Service Bulletin 

10015804–35–01, dated March 6, 2019. 

(2) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–01, Revision 01, dated 

July 9, 2019. 

(3) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–02, Revision 1, dated 

September 4, 2019. 

(4) AVOX Systems Inc. Service Bulletin 

10015804–35–03, dated April 11, 2019. 

(5) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–03, Revision 01, dated 

May 21, 2019. 

(m) Alternative Methods of Compliance 

(AMOCs) 

(1) 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 local Flight Standards 

District 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. 

(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. 

(n) Related Information 

(1) For more information about this AD, 

contact Elizabeth Dowling, Aerospace 

Engineer, Mechanical Systems and 

Administrative Services Section, FAA, New 

York ACO Branch, 1600 Stewart Avenue, 

Suite 410, Westbury, NY 11590; telephone 

516–228–7300; email 9-avs-nyaco-cos@

faa.gov. 

(2) Service information identified in this 

AD that is not incorporated by reference is 

available at the addresses specified in 

paragraphs (o)(3) and (4) of this AD. 

(o) 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. 

(i) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–01, Revision 02, dated 

October 16, 2019. 

(ii) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–02, Revision 2, dated 

October 31, 2019. 

(iii) AVOX Systems Inc. Alert Service 

Bulletin 10015804–35–03, Revision 02, dated 

October 15, 2019. 

(3) For service information identified in 

this AD, contact AVOX Systems Inc., 225 

Erie Street, Lancaster, NY 14086; telephone 

716–683–5100; internet https://

www.safranaerosystems.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, 

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

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

Issued on February 11, 2022. 

Lance T. Gant, 

Director, Compliance & Airworthiness 

Division, Aircraft Certification Service. 

[FR Doc. 2022–04146 Filed 2–25–22; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF HEALTH AND 

HUMAN SERVICES 

Food and Drug Administration 

21 CFR Parts 500, 510, 516, 520, 522, 

524, 529, 556, and 558 

[Docket No. FDA–2021–N–0002] 

New Animal Drugs; Approval of New 

Animal Drug Applications; Withdrawal 

of Approval of a New Animal Drug 

Application; Change of Sponsor 

AGENCY: Food and Drug Administration, 

HHS. 

ACTION: Final rule; technical 

amendments. 

SUMMARY: The Food and Drug 

Administration (FDA or we) is 

amending the animal drug regulations to 

reflect application-related actions for 

new animal drug applications (NADAs), 

abbreviated new animal drug 

applications (ANADAs), and a 

conditionally approved new animal 

drug application (cNADA) during July, 

August, and September 2021. FDA is 

informing the public of the availability 

of summaries of the basis of approval 

and of environmental review 

documents, where applicable. The 

animal drug regulations are also being 

amended to improve the accuracy of the 

regulations. 

DATES: This rule is effective February 

28, 2022. The incorporation by reference 

of certain material listed in this rule is 

approved by the Director of the Federal 

Register as February 28, 2022. The 

incorporation by reference of other 

material listed in this rule was approved 

by the Director of the Federal Register 

as of November 25, 2011. 

FOR FURTHER INFORMATION CONTACT: 

George K. Haibel, Center for Veterinary 

Medicine (HFV–6), Food and Drug 

Administration, 7500 Standish Pl., 

Rockville, MD 20855, 240–402–5689, 

george.haibel@fda.hhs.gov. 

SUPPLEMENTARY INFORMATION: 

I. Approvals 

FDA is amending the animal drug 

regulations to reflect approval actions 

for NADAs and ANADAs during July, 

August, and September 2021, as listed 

in table 1. In addition, FDA is informing 

the public of the availability, where 

applicable, of documentation of 

environmental review required under 

the National Environmental Policy Act 

(NEPA) and, for actions requiring 

review of safety or effectiveness data, 

summaries of the basis of approval (FOI 

Summaries) under the Freedom of 

Information Act (FOIA). These public 

documents may be seen in the office of 

the Dockets Management Staff (HFA– 

305), Food and Drug Administration, 

5630 Fishers Lane, Rm. 1061, Rockville, 

MD 20852, between 9 a.m. and 4 p.m., 

Monday through Friday, 240–402–7500. 

Persons with access to the internet may 

obtain these documents at the CVM 

FOIA Electronic Reading Room: https:// 

www.fda.gov/about-fda/centerveterinary-medicine/cvm-foiaelectronic-reading-room. Marketing 

exclusivity and patent information may 

be accessed in FDA’s publication, 

‘‘Approved Animal Drug Products 

Online (Green Book)’’ at: https://

www.fda.gov/animal-veterinary/ 

products/approved-animal-drugproducts-green-book. 

FDA has verified the website 

addresses as of the date this document 

publishes in the Federal Register, but 

websites are subject to change over time. 


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