Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes, 38223-38225 [2021-15346]

Download as PDF Federal Register / Vol. 86, No. 136 / Tuesday, July 20, 2021 / Rules and Regulations installation within 550 hours TIS after accomplishment of the measurement specified in paragraph 3.1. of DGAC AD 2001–061–053(A) and DGAC AD 2001–283– 025(A). (5) Where the service information referred to in DGAC AD 2001–061–053(A) and DGAC AD 2001–283–025(A) specifies to perform a dye penetrant crack inspection ‘‘if in doubt,’’ this AD requires performing a dye penetrant inspection. (6) Where paragraph 3.2.2. of DGAC AD 2001–061–053(A) and DGAC AD 2001–283– 025(A) specifies to do various actions specified in paragraphs 3.2.2.a), b), and c) of those ADs, for this AD, if any frame is cracked, before further flight, repair the frame. Acceptable U.S. alternatives to the fasteners and materials needed to perform repairs or modifications are listed in American Eurocopter Engineering Report No. AEC/03R–E–005, ‘‘Addendum ASB 53.00.42 and 53.00.43 AS365’’, dated January 29, 2003. (7) Where the Note in paragraph 3.2.2. of DGAC AD 2001–061–053(A) and DGAC AD 2001–283–025(A) specifies the instructions are no longer applicable after a customized repair has been carried out, for this AD, modifying or repairing the frame constitutes terminating action for the requirements of this AD. (i) Special Flight Permit Special flight permits, as described in 14 CFR 21.197 and 21.199, are prohibited. (j) 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 (k) 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. khammond on DSKJM1Z7X2PROD with RULES (k) Related Information For more information about this AD, contact Blaine Williams, Aerospace Engineer, Cabin Safety & Environmental Systems Section, Los Angeles ACO Branch, Compliance & Airworthiness Division, 3960 Paramount Blvd., Lakewood, CA 90712; telephone 562–627–5371; email blaine.williams@faa.gov. (l) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless the AD specifies otherwise. VerDate Sep<11>2014 15:59 Jul 19, 2021 Jkt 253001 (i) Direction Ge´ne´rale de l’Aviation Civile (DGAC) AD 2001–061–053(A), dated February 21, 2001. (ii) DGAC AD 2001–283–025(A), dated July 11, 2001. (iii) American Eurocopter Engineering Report No. AEC/03R–E–005, ‘‘Addendum ASB 53.00.42 and 53.00.43 AS365’’, dated January 29, 2003. (3) For DGAC AD 2001–061–053(A) and DGAC AD 2001–283–025(A), contact the European Union Aviation Safety Agency (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 these DGAC ADs on the EASA website at https:// ad.easa.europa.eu. (4) For American Eurocopter material identified in this AD, contact Airbus Helicopters, 2701 N Forum Drive, Grand Prairie, TX 75052; telephone 972–641–0000 or 800–232–0323; fax 972–641–3775; or at https://www.airbus.com/helicopters/services/ technical-support.html. (5) 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. (6) You may view this service information that is incorporated by reference at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, email: fedreg.legal@nara.gov, or go to: https://www.archives.gov/federal-register/cfr/ ibr-locations.html. Issued on July 2, 2021. Ross Landes, Deputy Director for Regulatory Operations, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–15302 Filed 7–19–21; 8:45 am] DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2021–0031; Project Identifier MCAI–2020–01420–T; Amendment 39–21625; AD 2021–13–20] RIN 2120–AA64 Airworthiness Directives; Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). ACTION: Final rule. AGENCY: The FAA is adopting a new airworthiness directive (AD) for certain Airbus Canada Limited Partnership SUMMARY: Frm 00015 Fmt 4700 Model BD–500–1A10 and BD–500– 1A11 airplanes. This AD was prompted by reports of corrosion on the waste box, waste access doubler, and waste service door of the rear fuselage due to contamination from waste valve leakage. This AD requires an inspection for corrosion of the waste box, waste access doubler, and waste service door, and corrective actions if necessary, as specified in a Transport Canada Civil Aviation (TCCA) AD, which is incorporated by reference. The FAA is issuing this AD to address the unsafe condition on these products. This AD is effective August 24, 2021. The Director of the Federal Register approved the incorporation by reference of a certain publication listed in this AD as of August 24, 2021. DATES: For material incorporated by reference (IBR) in this AD, contact TCCA, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario, K1A 0N5, Canada; telephone 888–663–3639; email AD-CN@tc.gc.ca; internet https:// tc.canada.ca/en/aviation. You may view this IBR 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. It is also available in the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2021– 0031. ADDRESSES: Examining the AD Docket BILLING CODE 4910–13–P PO 00000 38223 Sfmt 4700 You may examine the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2021– 0031; 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: Siddeeq Bacchus, Aerospace Engineer, Mechanical Systems and Administrative Services Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7362; fax 516–794–5531; email 9-avs-nyaco-cos@faa.gov. SUPPLEMENTARY INFORMATION: E:\FR\FM\20JYR1.SGM 20JYR1 38224 Federal Register / Vol. 86, No. 136 / Tuesday, July 20, 2021 / Rules and Regulations Background TCCA, which is the aviation authority for Canada, has issued TCCA AD CF– 2020–42, issued October 16, 2020 (TCCA AD CF–2020–42) (also referred to as the Mandatory Continuing Airworthiness Information, or the MCAI), to correct an unsafe condition for certain Airbus Canada Limited Partnership Model BD–500–1A10 and BD–500–1A11 airplanes. The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 CFR part 39 by adding an AD that would apply to certain Airbus Canada Limited Partnership Model BD–500–1A10 and BD–500–1A11 airplanes. The NPRM published in the Federal Register on February 24, 2021 (86 FR 11173). The NPRM was prompted by reports of corrosion on the waste box, waste access doubler, and waste service door of the rear fuselage due to contamination from waste valve leakage. The NPRM proposed to require an inspection for corrosion of the waste box, waste access doubler, and waste service door, and corrective actions if necessary, as specified in TCCA AD CF–2020–42. Comments The FAA gave the public the opportunity to participate in developing this final rule. The following presents the comments received on the NPRM and the FAA’s response to each comment. Request To Require Additional Service Information Delta Air Lines (DAL) asked that Airbus Canada Service Bulletin BD500– 383004, Issue No. 001, dated January 29, 2021, also be mandated either in the proposed AD or in additional rulemaking by the FAA and TCCA. DAL stated that the proposed AD, as written, does not address the root cause of the corrosion, which is leakage from the waste disposal ball valve. DAL added that the actions specified in the proposed AD will act as an effective method of ensuring that existing corrosion is identified and addressed, but do not address the root cause of the corrosion. DAL stated that Airbus Canada Service Bulletin BD500–383004 would address that root cause by providing instructions for the retrofit of an improved valve, which resists leakage more effectively than the valve with the original configuration. DAL noted that if fluid leakage from the waste servicing system is the root cause for corrosion of the fuselage, proactive retrofit of the ball valve to the improved configuration would properly address that root cause. The FAA does not agree with the commenter. The FAA is currently reviewing Airbus Canada Service Bulletin BD500–383004, Issue No. 001, dated January 29, 2021, and gathering more information about the new valve. After completing this review the FAA might consider further rulemaking. The FAA has not changed this AD in this regard. Request To Clarify Exception to TCCA AD CF–2020–42 DAL asked for clarification that the exception identified in paragraph (h) of the proposed AD does not deviate from the TCCA AD. DAL stated that TCCA AD CF–2020–42 and Airbus Canada Service Bulletin BD500–536004, Issue No. 001, dated August 13, 2020, both include instructions for implementation of corrective action to documented discrepancies, and neither include any allowance to defer the corrective action beyond the maintenance opportunity in which the inspection is performed and the corrosion is documented. The FAA disagrees that this AD does not deviate from the TCCA AD. Paragraph (h) of this AD is included as an exception to the MCAI because the TCCA AD does not explicitly state in the ‘‘Compliance’’ or ‘‘Corrective Actions’’ sections that when corrosion is found, the corrective action of corrosion repair must be done before further flight. The inclusion of paragraph (h) of this AD requires that the corrective action is done ‘‘before further flight’’ after detection of corrosion, as identified in the applicable service information specified in TCCA AD CF–2020–42, instead of the compliance time specified in TCCA AD CF–2020–42 for all applicable actions. The FAA has revised paragraph (h) of this AD to specify that the corrective action (corrosion repair) must be done before further flight after corrosion is detected. Conclusion The FAA reviewed the relevant data, considered the comments received, and determined that air safety and the public interest require adopting this final rule as proposed, except for minor editorial changes. The FAA has determined that these minor changes: • Are consistent with the intent that was proposed in the NPRM for addressing the unsafe condition; and • Do not add any additional burden upon the public than was already proposed in the NPRM. Related Service Information Under 1 CFR Part 51 TCCA AD CF–2020–42 describes procedures for a general visual inspection for corrosion of the waste box, waste access doubler, and waste service door 146BR of the rear fuselage; application of protective coating in the waste box area; and corrective actions. The corrective actions include repair of any corrosion found. This material is reasonably available because the interested parties have access to it through their normal course of business or by the means identified in the ADDRESSES section. Costs of Compliance The FAA estimates that this AD affects 28 airplanes of U.S. registry. The FAA estimates the following costs to comply with this AD: khammond on DSKJM1Z7X2PROD with RULES ESTIMATED COSTS FOR REQUIRED ACTIONS Labor cost Parts cost Cost per product Cost on U.S. operators 8 work-hours × $85 per hour = $680 .......................................................................................... $0 $680 $19,040 The FAA has received no definitive data on which to base the cost estimates for the on-condition actions specified in this AD. Authority for This Rulemaking Title 49 of the United States Code specifies the FAA’s authority to issue VerDate Sep<11>2014 15:59 Jul 19, 2021 Jkt 253001 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 PO 00000 Frm 00016 Fmt 4700 Sfmt 4700 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. E:\FR\FM\20JYR1.SGM 20JYR1 Federal Register / Vol. 86, No. 136 / Tuesday, July 20, 2021 / Rules and Regulations This regulation is within the scope of that authority because it addresses an unsafe condition that is likely to exist or develop on products identified in this rulemaking action. Regulatory Findings This AD will not have federalism implications under Executive Order 13132. This AD will not have a substantial direct effect on the States, on the relationship between the national government and the States, or on the distribution of power and responsibilities among the various levels of government. For the reasons discussed above, I certify that this AD: (1) Is not a ‘‘significant regulatory action’’ under Executive Order 12866, (2) Will not affect intrastate aviation in Alaska, and (3) Will not have a significant economic impact, positive or negative, on a substantial number of small entities under the criteria of the Regulatory Flexibility Act. List of Subjects in 14 CFR Part 39 Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. Adoption of 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: ■ 2021–13–20 Airbus Canada Limited Partnership (Type Certificate Previously Held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.): Amendment 39–21625; Docket No. FAA–2021–0031; Project Identifier MCAI–2020–01420–T. khammond on DSKJM1Z7X2PROD with RULES (a) Effective Date This airworthiness directive (AD) is effective August 24, 2021. (b) Affected ADs None. (c) Applicability This AD applies to Airbus Canada Limited Partnership (type certificate previously held by C Series Aircraft Limited Partnership (CSALP); Bombardier, Inc.) Model BD–500– 1A10 and BD–500–1A11 airplanes, VerDate Sep<11>2014 17:22 Jul 19, 2021 Jkt 253001 38225 certificated in any category, as identified in Transport Canada Civil Aviation (TCCA) AD CF–2020–42, issued October 16, 2020 (TCCA AD CF–2020–42). FAA; or TCCA; or Airbus Canada’s TCCA Design Approval Organization (DAO). If approved by the DAO, the approval must include the DAO-authorized signature. (d) Subject Air Transport Association (ATA) of America Code 53, Fuselage. (j) Related Information For more information about this AD, contact Siddeeq Bacchus, Aerospace Engineer, Mechanical Systems and Administrative Services Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516–228–7362; fax 516–794–5531; email 9-avs-nyaco-cos@faa.gov. (e) Reason This AD was prompted by reports of corrosion on the waste box, waste access doubler, and waste service door of the rear fuselage due to contamination from waste valve leakage. The FAA is issuing this AD to address this corrosion, which could lead to cracking or holes in the waste box or airplane skin, and consequent cabin pressure leakage and catastrophic structural damage of the airplane. (f) Compliance Comply with this AD within the compliance times specified, unless already done. (g) Requirements Except as specified in paragraph (h) of this AD: Comply with all required actions and compliance times specified in, and in accordance with, TCCA AD CF–2020–42. (h) Exception to TCCA AD CF–2020–42 Where TCCA AD CF–2020–42 specifies a compliance time of ‘‘Within 14,200 flight cycles or 56 months from the aeroplane date of manufacture, as identified on the identification plate of the aeroplane’’ or ‘‘Within 9,900 flight cycles or 56 months from the aeroplane date of manufacture, as identified on the identification plate of the aeroplane,’’ depending on airplane configuration, to accomplish all applicable actions, this AD requires that corrosion repair be done before further flight after detection of corrosion, as identified in the applicable service information specified in TCCA AD CF–2020–42. (i) Other FAA AD Provisions The following provisions also apply to this AD: (1) Alternative Methods of Compliance (AMOCs): The Manager, New York ACO Branch, FAA, has the authority to approve AMOCs for this AD, if requested using the procedures found in 14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to your principal inspector or 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. 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. (2) Contacting the Manufacturer: For any requirement in this AD to obtain instructions from a manufacturer, the instructions must be accomplished using a method approved by the Manager, New York ACO Branch, PO 00000 Frm 00017 Fmt 4700 Sfmt 4700 (k) Material Incorporated by Reference (1) The Director of the Federal Register approved the incorporation by reference (IBR) of the service information listed in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51. (2) You must use this service information as applicable to do the actions required by this AD, unless this AD specifies otherwise. (i) Transport Canada Civil Aviation (TCCA) AD CF–2020–42, issued October 16, 2020. (ii) [Reserved] (3) For TCCA AD CF–2020–42, contact TCCA, Transport Canada National Aircraft Certification, 159 Cleopatra Drive, Nepean, Ontario K1A 0N5, Canada; telephone 888– 663–3639; email AD-CN@tc.gc.ca; internet https://tc.canada.ca/en/aviation. (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. This material may be found in the AD docket on the internet at https:// www.regulations.gov by searching for and locating Docket No. FAA–2021–0031. (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 fedreg.legal@ nara.gov, or go to: https://www.archives.gov/ federal-register/cfr/ibr-locations.html. Issued on June 18, 2021. Lance T. Gant, Director, Compliance & Airworthiness Division, Aircraft Certification Service. [FR Doc. 2021–15346 Filed 7–19–21; 8:45 am] BILLING CODE 4910–13–P DEPARTMENT OF TRANSPORTATION Federal Aviation Administration 14 CFR Part 39 [Docket No. FAA–2021–0272; Project Identifier MCAI–2020–01485–T; Amendment 39–21628; AD 2021–14–01] RIN 2120–AA64 Airworthiness Directives; Bombardier, Inc., Airplanes Federal Aviation Administration (FAA), Department of Transportation (DOT). AGENCY: E:\FR\FM\20JYR1.SGM 20JYR1

Agencies

[Federal Register Volume 86, Number 136 (Tuesday, July 20, 2021)]
[Rules and Regulations]
[Pages 38223-38225]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-15346]


-----------------------------------------------------------------------

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2021-0031; Project Identifier MCAI-2020-01420-T; 
Amendment 39-21625; AD 2021-13-20]
RIN 2120-AA64


Airworthiness Directives; Airbus Canada Limited Partnership (Type 
Certificate Previously Held by C Series Aircraft Limited Partnership 
(CSALP); Bombardier, Inc.) Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of 
Transportation (DOT).

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: The FAA is adopting a new airworthiness directive (AD) for 
certain Airbus Canada Limited Partnership Model BD-500-1A10 and BD-500-
1A11 airplanes. This AD was prompted by reports of corrosion on the 
waste box, waste access doubler, and waste service door of the rear 
fuselage due to contamination from waste valve leakage. This AD 
requires an inspection for corrosion of the waste box, waste access 
doubler, and waste service door, and corrective actions if necessary, 
as specified in a Transport Canada Civil Aviation (TCCA) AD, which is 
incorporated by reference. The FAA is issuing this AD to address the 
unsafe condition on these products.

DATES: This AD is effective August 24, 2021.
    The Director of the Federal Register approved the incorporation by 
reference of a certain publication listed in this AD as of August 24, 
2021.

ADDRESSES: For material incorporated by reference (IBR) in this AD, 
contact TCCA, Transport Canada National Aircraft Certification, 159 
Cleopatra Drive, Nepean, Ontario, K1A 0N5, Canada; telephone 888-663-
3639; email [email protected]; internet https://tc.canada.ca/en/aviation. 
You may view this IBR 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. It is also available in the AD docket on the 
internet at https://www.regulations.gov by searching for and locating 
Docket No. FAA-2021-0031.

Examining the AD Docket

    You may examine the AD docket on the internet at https://www.regulations.gov by searching for and locating Docket No. FAA-2021-
0031; 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: Siddeeq Bacchus, Aerospace Engineer, 
Mechanical Systems and Administrative Services Section, FAA, New York 
ACO Branch, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; 
telephone 516-228-7362; fax 516-794-5531; email [email protected].

SUPPLEMENTARY INFORMATION:

[[Page 38224]]

Background

    TCCA, which is the aviation authority for Canada, has issued TCCA 
AD CF-2020-42, issued October 16, 2020 (TCCA AD CF-2020-42) (also 
referred to as the Mandatory Continuing Airworthiness Information, or 
the MCAI), to correct an unsafe condition for certain Airbus Canada 
Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes.
    The FAA issued a notice of proposed rulemaking (NPRM) to amend 14 
CFR part 39 by adding an AD that would apply to certain Airbus Canada 
Limited Partnership Model BD-500-1A10 and BD-500-1A11 airplanes. The 
NPRM published in the Federal Register on February 24, 2021 (86 FR 
11173). The NPRM was prompted by reports of corrosion on the waste box, 
waste access doubler, and waste service door of the rear fuselage due 
to contamination from waste valve leakage. The NPRM proposed to require 
an inspection for corrosion of the waste box, waste access doubler, and 
waste service door, and corrective actions if necessary, as specified 
in TCCA AD CF-2020-42.

Comments

    The FAA gave the public the opportunity to participate in 
developing this final rule. The following presents the comments 
received on the NPRM and the FAA's response to each comment.

Request To Require Additional Service Information

    Delta Air Lines (DAL) asked that Airbus Canada Service Bulletin 
BD500-383004, Issue No. 001, dated January 29, 2021, also be mandated 
either in the proposed AD or in additional rulemaking by the FAA and 
TCCA. DAL stated that the proposed AD, as written, does not address the 
root cause of the corrosion, which is leakage from the waste disposal 
ball valve. DAL added that the actions specified in the proposed AD 
will act as an effective method of ensuring that existing corrosion is 
identified and addressed, but do not address the root cause of the 
corrosion. DAL stated that Airbus Canada Service Bulletin BD500-383004 
would address that root cause by providing instructions for the 
retrofit of an improved valve, which resists leakage more effectively 
than the valve with the original configuration. DAL noted that if fluid 
leakage from the waste servicing system is the root cause for corrosion 
of the fuselage, proactive retrofit of the ball valve to the improved 
configuration would properly address that root cause.
    The FAA does not agree with the commenter. The FAA is currently 
reviewing Airbus Canada Service Bulletin BD500-383004, Issue No. 001, 
dated January 29, 2021, and gathering more information about the new 
valve. After completing this review the FAA might consider further 
rulemaking. The FAA has not changed this AD in this regard.

Request To Clarify Exception to TCCA AD CF-2020-42

    DAL asked for clarification that the exception identified in 
paragraph (h) of the proposed AD does not deviate from the TCCA AD. DAL 
stated that TCCA AD CF-2020-42 and Airbus Canada Service Bulletin 
BD500-536004, Issue No. 001, dated August 13, 2020, both include 
instructions for implementation of corrective action to documented 
discrepancies, and neither include any allowance to defer the 
corrective action beyond the maintenance opportunity in which the 
inspection is performed and the corrosion is documented.
    The FAA disagrees that this AD does not deviate from the TCCA AD. 
Paragraph (h) of this AD is included as an exception to the MCAI 
because the TCCA AD does not explicitly state in the ``Compliance'' or 
``Corrective Actions'' sections that when corrosion is found, the 
corrective action of corrosion repair must be done before further 
flight. The inclusion of paragraph (h) of this AD requires that the 
corrective action is done ``before further flight'' after detection of 
corrosion, as identified in the applicable service information 
specified in TCCA AD CF-2020-42, instead of the compliance time 
specified in TCCA AD CF-2020-42 for all applicable actions. The FAA has 
revised paragraph (h) of this AD to specify that the corrective action 
(corrosion repair) must be done before further flight after corrosion 
is detected.

Conclusion

    The FAA reviewed the relevant data, considered the comments 
received, and determined that air safety and the public interest 
require adopting this final rule as proposed, except for minor 
editorial changes. The FAA has determined that these minor changes:
     Are consistent with the intent that was proposed in the 
NPRM for addressing the unsafe condition; and
     Do not add any additional burden upon the public than was 
already proposed in the NPRM.

Related Service Information Under 1 CFR Part 51

    TCCA AD CF-2020-42 describes procedures for a general visual 
inspection for corrosion of the waste box, waste access doubler, and 
waste service door 146BR of the rear fuselage; application of 
protective coating in the waste box area; and corrective actions. The 
corrective actions include repair of any corrosion found. This material 
is reasonably available because the interested parties have access to 
it through their normal course of business or by the means identified 
in the ADDRESSES section.

Costs of Compliance

    The FAA estimates that this AD affects 28 airplanes of U.S. 
registry. The FAA estimates the following costs to comply with this AD:

                                      Estimated Costs for Required Actions
----------------------------------------------------------------------------------------------------------------
                                                                                    Cost per       Cost on U.S.
                          Labor cost                              Parts cost        product         operators
----------------------------------------------------------------------------------------------------------------
8 work-hours x $85 per hour = $680...........................              $0             $680          $19,040
----------------------------------------------------------------------------------------------------------------

    The FAA has received no definitive data on which to base the cost 
estimates for the on-condition actions specified in this AD.

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.

[[Page 38225]]

This regulation is within the scope of that authority because it 
addresses an unsafe condition that is likely to exist or develop on 
products identified in this rulemaking action.

Regulatory Findings

    This AD will not have federalism implications under Executive Order 
13132. This AD will not have a substantial direct effect on the States, 
on the relationship between the national government and the States, or 
on the distribution of power and responsibilities among the various 
levels of government.
    For the reasons discussed above, I certify that this AD:
    (1) Is not a ``significant regulatory action'' under Executive 
Order 12866,
    (2) Will not affect intrastate aviation in Alaska, and
    (3) Will not have a significant economic impact, positive or 
negative, on a substantial number of small entities under the criteria 
of the Regulatory Flexibility Act.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Incorporation by 
reference, Safety.

Adoption of 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

0
1. The authority citation for part 39 continues to read as follows:

    Authority:  49 U.S.C. 106(g), 40113, 44701.


Sec.  39.13  [Amended]

0
2. The FAA amends Sec.  39.13 by adding the following new airworthiness 
directive:

2021-13-20 Airbus Canada Limited Partnership (Type Certificate 
Previously Held by C Series Aircraft Limited Partnership (CSALP); 
Bombardier, Inc.): Amendment 39-21625; Docket No. FAA-2021-0031; 
Project Identifier MCAI-2020-01420-T.

(a) Effective Date

    This airworthiness directive (AD) is effective August 24, 2021.

(b) Affected ADs

    None.

(c) Applicability

    This AD applies to Airbus Canada Limited Partnership (type 
certificate previously held by C Series Aircraft Limited Partnership 
(CSALP); Bombardier, Inc.) Model BD-500-1A10 and BD-500-1A11 
airplanes, certificated in any category, as identified in Transport 
Canada Civil Aviation (TCCA) AD CF-2020-42, issued October 16, 2020 
(TCCA AD CF-2020-42).

(d) Subject

    Air Transport Association (ATA) of America Code 53, Fuselage.

(e) Reason

    This AD was prompted by reports of corrosion on the waste box, 
waste access doubler, and waste service door of the rear fuselage 
due to contamination from waste valve leakage. The FAA is issuing 
this AD to address this corrosion, which could lead to cracking or 
holes in the waste box or airplane skin, and consequent cabin 
pressure leakage and catastrophic structural damage of the airplane.

(f) Compliance

    Comply with this AD within the compliance times specified, 
unless already done.

 (g) Requirements

    Except as specified in paragraph (h) of this AD: Comply with all 
required actions and compliance times specified in, and in 
accordance with, TCCA AD CF-2020-42.

 (h) Exception to TCCA AD CF-2020-42

    Where TCCA AD CF-2020-42 specifies a compliance time of ``Within 
14,200 flight cycles or 56 months from the aeroplane date of 
manufacture, as identified on the identification plate of the 
aeroplane'' or ``Within 9,900 flight cycles or 56 months from the 
aeroplane date of manufacture, as identified on the identification 
plate of the aeroplane,'' depending on airplane configuration, to 
accomplish all applicable actions, this AD requires that corrosion 
repair be done before further flight after detection of corrosion, 
as identified in the applicable service information specified in 
TCCA AD CF-2020-42.

 (i) Other FAA AD Provisions

    The following provisions also apply to this AD:
    (1) Alternative Methods of Compliance (AMOCs): The Manager, New 
York ACO Branch, FAA, has the authority to approve AMOCs for this 
AD, if requested using the procedures found in 14 CFR 39.19. In 
accordance with 14 CFR 39.19, send your request to your principal 
inspector or 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. 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.
    (2) Contacting the Manufacturer: For any requirement in this AD 
to obtain instructions from a manufacturer, the instructions must be 
accomplished using a method approved by the Manager, New York ACO 
Branch, FAA; or TCCA; or Airbus Canada's TCCA Design Approval 
Organization (DAO). If approved by the DAO, the approval must 
include the DAO-authorized signature.

(j) Related Information

    For more information about this AD, contact Siddeeq Bacchus, 
Aerospace Engineer, Mechanical Systems and Administrative Services 
Section, FAA, New York ACO Branch, 1600 Stewart Avenue, Suite 410, 
Westbury, NY 11590; telephone 516-228-7362; fax 516-794-5531; email 
[email protected].

(k) Material Incorporated by Reference

    (1) The Director of the Federal Register approved the 
incorporation by reference (IBR) of the service information listed 
in this paragraph under 5 U.S.C. 552(a) and 1 CFR part 51.
    (2) You must use this service information as applicable to do 
the actions required by this AD, unless this AD specifies otherwise.
    (i) Transport Canada Civil Aviation (TCCA) AD CF-2020-42, issued 
October 16, 2020.
    (ii) [Reserved]
    (3) For TCCA AD CF-2020-42, contact TCCA, Transport Canada 
National Aircraft Certification, 159 Cleopatra Drive, Nepean, 
Ontario K1A 0N5, Canada; telephone 888-663-3639; email [email protected]; internet https://tc.canada.ca/en/aviation.
    (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. This material may be found in the AD 
docket on the internet at https://www.regulations.gov by searching 
for and locating Docket No. FAA-2021-0031.
    (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 
[email protected], or go to: https://www.archives.gov/federal-register/cfr/ibr-locations.html.

    Issued on June 18, 2021.
Lance T. Gant,
Director, Compliance & Airworthiness Division, Aircraft Certification 
Service.
[FR Doc. 2021-15346 Filed 7-19-21; 8:45 am]
BILLING CODE 4910-13-P