(a) EFFECTIVE DATE
This airworthiness directive (AD) is effective November 26, 2024.
(b) AFFECTED ADS
This AD replaces AD 2023-13-11, Amendment 39-22496 (88 FR 50011,
August 1, 2023) (AD 2023-13-11).
(c) APPLICABILITY
This AD applies to Safran Aerosystems (formerly AVOX Systems Inc.;
Scott Aviation) oxygen cylinder and valve assemblies having part
number (P/N) 89794050, 89794077, 89794015, 891511-14, 806835-01,
807982-01, 808433-01, or 891311-14; 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 Regional Model ATR42-200, -300, -320, and
-500 airplanes.
(11) ATR-GIE Avions de Transport Regional 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.
(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, and by the manufacturer identifying additional assemblies and
parts affected by the unsafe condition. The FAA is issuing this AD to
address oxygen leakage from cylinder and valve assemblies. The unsafe
condition, if not addressed, 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) RETAINED DEFINITION OF DETAILED INSPECTION, WITH NO CHANGES
This paragraph restates the requirements of paragraph (g) of AD 2023
-13-11, with no changes. 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) RETAINED IDENTIFICATION OF AFFECTED CYLINDER AND VALVE ASSEMBLIES,
WITH UPDATED LANGUAGE
This paragraph restates the requirements of paragraph (h) of AD 2023
-13-11, with updated language. Within 60 days after September 5, 2023
(the effective date of AD 2023-13-11), 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 or Appendix 2, "Affected Shipments," of the
applicable material 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 03,
dated June 7, 2021.
(2) AVOX Systems Inc. Alert Service Bulletin 10015804-35-02, Revision 03,
dated March 11, 2022.
(3) AVOX Systems Inc. Alert Service Bulletin 10015804-35-03, Revision 03,
dated June 18, 2021.
(i) RETAINED INSPECTION OF THE GAP, PARTS MARKING ACTIONS, AND REPLACE-
MENT, WITH UPDATED LANGUAGE
This paragraph restates the requirements of paragraph (i) of AD 2023
-13-11, with updated language. 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 material identified in
paragraphs (h)(1) through (3) of this AD.
(1) If the gap is found to be acceptable, as defined in the applicable
material 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
material identified in paragraphs (h)(1) through (3) of this AD.
(2) If the gap is found to be unacceptable, as defined in the material
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 material identified in paragraphs (h)(1) through (3)
of this AD; and replace with a serviceable assembly.
(j) RETAINED RETURN OF PARTS, WITH UPDATED LANGUAGE
This paragraph restates the requirement to return parts, as specified
in paragraph (j)(2) of AD 2023-13-11, with updated language. 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)(1) or (2) 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
material identified in paragraphs (h)(1) through (3) of this AD,
except you are not required to contact AVOX Systems Inc. for shipping
instructions.
(1) If the inspection was done on or after September 5, 2023 (the
effective date of AD 2023-13-11): Return the assembly within 30 days
after the inspection.
(2) If the inspection was done before September 5, 2023 (the effective
date of AD 2023-13-11): Return the assembly within 30 days after
September 5, 2023.
(k) RETAINED PARTS INSTALLATION LIMITATION, WITH UPDATED LANGUAGE
This paragraph restates the provisions of paragraph (k) of AD 2023-13
-11, with updated language. As of September 5, 2023 (the effective
date of AD 2023-13-11), 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," or
Appendix 2, "Affected Shipments," of any AVOX Systems Inc. material
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) NEW IDENTIFICATION OF ADDITIONAL AFFECTED CYLINDER AND VALVE ASSEM-
BLIES
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 3, "Affected Shipments," of the
applicable material identified in paragraphs (l)(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) Safran Aerosystems Alert Service Bulletin 10015804-35-01, Revision 04,
dated November 9, 2023, except as specified in paragraphs (l)(1)(i)
and (ii).
(i) In rows 2 through 492 of table tab "89794077" in Appendix 3 of Safran
Aerosystems Alert Service Bulletin 10015804-35-01, Revision 04, dated
November 9, 2023, the list of numbers in the "Valve Serial #" and
"Cylinder Serial #" columns have been transposed with each other and
the list of numbers in the "Valve Part #" and "Cylinder Part #"
columns have also been transposed with each other.
(ii) In rows 2 through 65 of table tab 891511-14 in Appendix 3 of Safran
Aerosystems Alert Service Bulletin 10015804-35-01, Revision 04, dated
November 9, 2023, the list of numbers in the "Valve Serial #" and
"Cylinder Serial #" columns have been transposed with each other, and
the list of numbers in the "Valve Part #" and "Cylinder Part #"
columns have been transposed with each other.
(2) Safran Aerosystems Alert Service Bulletin 10015804-35-02, Revision 06,
dated August 30, 2023.
(3) Safran Aerosystems Inc. Alert Service Bulletin 10015804-35-03,
Revision 05, dated September 29, 2023.
(m) NEW INSPECTION OF THE GAP, PARTS MARKING ACTIONS, AND REPLACEMENT FOR
ADDITIONAL PARTS
If, during any inspection or records review required by paragraph (l)
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
material identified in paragraphs (l)(1) through (3) of this AD.
(1) If the gap is found to be acceptable, as defined in the applicable
material identified in paragraphs (l)(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
material identified in paragraphs (l)(1) through (3) of this AD.
(2) If the gap is found to be unacceptable, as defined in the material
identified in paragraphs (l)(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 material identified in paragraphs (l)(1) through (3)
of this AD; and replace with a serviceable assembly.
(n) NEW RETURN OF ADDITIONAL PARTS
If, during the inspection required by paragraph (m) of this AD, any
gap is found to be unacceptable, within the applicable time specified
in paragraph (n)(1) or (2) 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
material identified in paragraphs (l)(1) through (3) of this AD,
except you are not required to contact Safran Aerosystems for shipping
instructions.
(1) If the inspection was done on or after the effective date of this AD:
Return the assembly within 30 days after the inspection.
(2) 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.
(o) NEW PARTS INSTALLATION LIMITATION
As of the effective date of this AD, no AVOX Systems Inc. or Safran
Aerosystems 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 3,
"Affected Shipments," of any Safran Aerosystems Inc. material
identified in paragraphs (l)(1) through (3) of this AD may be
installed on any airplane unless the requirements of paragraph (m) of
this AD have been accomplished on that affected assembly.
(p) CREDIT FOR PREVIOUS ACTIONS
(1) This paragraph provides credit for the actions specified in paragraphs
(h) or (i) of this AD, if those actions were performed before
September 5, 2023 (the effective date of AD 2023-13-11), using the
material specified in paragraphs (p)(1)(i) through (iii) of this AD.
This material is not incorporated by reference in this AD.
(i) AVOX Systems Inc. Service Bulletin 10015804-35-01, dated March 6,
2019; and AVOX Systems Inc. Alert Service Bulletin 10015804-35-01,
Revision 01, dated July 9, 2019.
(ii) AVOX Systems Inc. Alert Service Bulletin 10015804-35-02, Revision 1,
dated September 4, 2019.
(iii) AVOX Systems Inc. Service Bulletin 10015804-35-03, dated April 11,
2019; and AVOX Systems Inc. Alert Service Bulletin 10015804-35-03,
Revision 01, dated May 21, 2019.
(2) This paragraph provides credit for the actions specified in paragraphs
(h) or (i) of this AD, if those actions were performed before
September 5, 2023 (the effective date of AD 2023-13-11), using the
material specified in paragraphs (p)(2)(i) through (iii) of this AD,
which was incorporated by reference in AD 2022-04-09.
(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) This paragraph provides credit for the actions specified in paragraphs
(h), (i), (l), or (m) of this AD, if those actions were performed
before the effective date of this AD, using the material specified in
paragraphs (p)(3)(i) through (ii) of this AD. This material is not
incorporated by reference in this AD.
(i) AVOX Systems Inc. Alert Service Bulletin 10015804-35-02, Revision 04,
dated June 30, 2023; or Revision 05, dated August 14, 2023.
(ii) AVOX Systems Inc. Alert Service Bulletin 10015804-35-03, Revision 04,
dated June 12, 2023.
(q) ALTERNATIVE METHODS OF COMPLIANCE (AMOCS)
(1) The Manager, East Certification Branch, FAA, has the authority to
approve AMOCs for this AD, if requested using the procedures found in
14 CFR 39.19. In accordance with 14 CFR 39.19, send your request to
your principal inspector or responsible Flight Standards Office, as
appropriate. If sending information directly to the manager of the
East Certification Branch, send it to ATTN: Program Manager,
Continuing Operational Safety, at the address identified in paragraph
(r) of this AD or email to: AMOC@faa.gov.
(2) Before using any approved AMOC, notify your appropriate principal in-
spector, or lacking a principal inspector, the manager of the
responsible Flight Standards Office.
(3) AMOCs approved for AD 2023-13-11 are approved as AMOCs for the
corresponding provisions of this AD.
(r) RELATED INFORMATION
(1) For more information about this AD, contact Gabriel Kim, Aviation
Safety Engineer, FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY
11590; telephone 516-228-7300; email 9-avs-nyaco-cos@faa.gov.
(2) Material identified in this AD that is not incorporated by reference
is available at the address specified in paragraph (s)(5) of this AD.
(s) MATERIAL INCORPORATED BY REFERENCE
(1) The Director of the Federal Register approved the incorporation by
reference (IBR) of the material listed in this paragraph under 5
U.S.C. 552(a) and 1 CFR part 51.
(2) You must use this material as applicable to do the actions required by
this AD, unless this AD specifies otherwise.
(3) The following material was approved for IBR on November 26, 2024 (89
FR 84267, October 22, 2024).
(i) Safran Aerosystems Alert Service Bulletin 10015804-35-01, Revision 04,
dated November 9, 2023.
(ii) Safran Aerosystems Alert Service Bulletin 10015804-35-02, Revision
06, dated August 30, 2023.
(iii) Safran Aerosystems Alert Service Bulletin 10015804-35-03, Revision
05, dated September 29, 2023.
(4) The following material was approved for IBR on September 5, 2023 (88
FR 50011, August 1, 2023).
(i) AVOX Systems Inc. Alert Service Bulletin 10015804-35-01, Revision 03,
dated June 7, 2021.
(ii) AVOX Systems Inc. Alert Service Bulletin 10015804-35-02, Revision 03,
dated March 11, 2022.
(iii) AVOX Systems Inc. Alert Service Bulletin 10015804-35-03, Revision
03, dated June 18, 2021.
(5) For material identified in this AD, contact AVOX Systems Inc., 225
Erie Street, Lancaster, NY 14086; telephone 716-683-5100; website
safranaerosystems.com.
(6) 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.
(7) You may view this material at the National Archives and Records Admin-
istration (NARA). For information on the availability of this material
at NARA, visit www.archives.gov/federal-register/cfr/ibr
-locationsoremailfr.inspection@nara.gov">www.archives.gov/federal
-register/cfr/ibr-locationsoremailfr.inspection@nara.gov.
Issued on October 30, 2024. Victor Wicklund, Deputy Director, Compliance &
Airworthiness Division, Aircraft Certification Service.
FOR FURTHER INFORMATION CONTACT: Gabriel Kim, Aviation Safety Engineer,
FAA, 1600 Stewart Avenue, Suite 410, Westbury, NY 11590; telephone 516-
228-7300; email 9-avs-nyaco-cos@faa.gov.