Voglio sapere a riguardo di…

Federal Register / Vol. 86, No. 154 / Friday, August 13, 2021 / Proposed Rules f Compliance Comply with this AD within the compliance times specified, unless already done.

jbell on DSKJLSW7X2PROD with PROPOSALS

g Retained Inspection To Determine THSA
Part Number and Accumulated Total Flight Cycles, With No Changes This paragraph restates the requirements of paragraph g of AD 20161712, with no changes. For airplanes identified in paragraphs c1 through 4 of this AD: No later than each date specified in paragraphs g1 through 5 of this AD, inspect the THSA to determine if it has a part number P/N 47145XXX, and, if any THSA P/N
47145XXX is found, determine the total number of flight cycles accumulated since the THSAs first installation on an airplane, or since the most recent NBB replacement, whichever is later. A review of airplane delivery or maintenance records is acceptable in lieu of this inspection if the part number of the THSA can be conclusively determined from that review. In case maintenance records concerning the most recent NBB disk replacement are unavailable or incomplete, the total flight cycles accumulated since first installation of the THSA on an airplane apply. Accomplishing the maintenance or inspection program revision required by paragraph l of this AD terminates the requirements of this paragraph.
1 As of September 30, 2016 the effective date of AD 20161712: The THSA flightcycle limit since first installation on an airplane, or since the most recent NBB
replacement, whichever is later is 40,000
total flight cycles.
2 As of December 31, 2016: The THSA
flight-cycle limit since first installation on an airplane, or since the most recent NBB
replacement, whichever is later is 36,000
total flight cycles.
3 As of December 31, 2017: The THSA
flight-cycle limit since first installation on an airplane, or since the most recent NBB
replacement, whichever is later is 33,600
total flight cycles.
4 As of December 31, 2018: The THSA
flight-cycle limit since first installation on an airplane, or since the most recent NBB
replacement, whichever is later is 31,600
total flight cycles.
5 As of December 31, 2019: The THSA
flight-cycle limit since first installation on an airplane, or since the most recent NBB
replacement, whichever is later is 30,000
total flight cycles.
h Retained Replacements, With No Changes This paragraph restates the requirements of paragraph h of AD 20161712, with no changes. For airplanes identified in paragraphs c1 through 4 of this AD: For airplanes with any THSA P/N 47145XXX, do the replacements required by paragraphs h1 and 2 of this AD. Accomplishing the maintenance or inspection program revision required by paragraph l of this AD
terminates the requirements of this paragraph.
1 No later than each date specified in paragraphs g1 through 5 of this AD, replace all THSA that have reached or
VerDate Sep<11>2014

16:19 Aug 12, 2021

Jkt 253001

exceeded on each date the corresponding number of flight cycles specified in paragraphs g1 through 5 of this AD. Do the replacement in accordance with the Accomplishment Instructions of Airbus Service Bulletin A320271242, Revision 01, dated February 4, 2016. Affected THSAs must be replaced with serviceable THSAs.
2 As of each date specified in paragraphs g1 through 5 of this AD, and before exceeding the flight cycle limit corresponding to each date, as applicable:
Replace each THSA with a serviceable THSA, in accordance with the Accomplishment Instructions of Airbus Service Bulletin A320271242, Revision 01, dated February 4, 2016.
i Retained Definition of Serviceable THSA, With No Changes This paragraph restates the definition of paragraph i of AD 20161712, with no changes. For airplanes identified in paragraphs c1 through 4 of this AD: For the purposes of this AD, a serviceable THSA
is a THSA that has not exceeded the applicable flight-cycle limits, as specified paragraphs g1 through 5 of this AD, since first installation of the THSA on an airplane or since last NBB replacement, whichever is later.
Note 1 to paragraph i: Guidance for NBB
disk replacement can be found in UTC
Aerospace Systems Service Bulletin 47145
2717, Revision 1, dated July 21, 2015.
j Retained Parts Installation Limitation, With No Changes This paragraph restates the provisions of paragraph j of AD 20161712, with no changes. For airplanes identified in paragraphs c1 through 4 of this AD: As of each date specified in paragraphs g1
through 5 of this AD, as applicable, only installation of a serviceable THSA P/N
47145XXX is allowed on an airplane.
Accomplishing the maintenance or inspection program revision required by paragraph l of this AD terminates the requirements of this paragraph.
k Retained Credit for Previous Actions, With No Changes This paragraph restates the requirements of paragraph k of AD 20161712, with no changes. For airplanes identified in paragraphs c1 through 4 of this AD: This paragraph provides credit for actions required by paragraph h of this AD, if those actions were performed before September 30, 2016 the effective date of AD 20161712, using Airbus Service Bulletin A320271242, dated February 9, 2015.
l New Maintenance or Inspection Program Revision 1 For the airplanes identified in paragraph c of this AD with an original airworthiness certificate or original export certificate of airworthiness issued on or before October 5, 2020, except as specified in paragraph m of this AD: Comply with all required actions and compliance times specified in, and in accordance with, European Union Aviation Safety Agency EASA AD 20200270, dated December 7,
PO 00000

Frm 00026

Fmt 4702

Sfmt 4702

44667

2020 EASA AD 20200270. Accomplishing the maintenance or inspection program revision required by this paragraph terminates the requirements of paragraphs g, h, and j of this AD.
2 For the airplanes identified in paragraph c of this AD with an original airworthiness certificate or original export certificate of airworthiness issued after October 5, 2020, revise the existing maintenance or inspection program, as applicable, to incorporate the provision specified in paragraph m7 of this AD.
m Exceptions to EASA AD 20200270
1 Where EASA AD 20200270 refers to its effective date, this AD requires using the effective date of this AD.
2 The requirements specified in paragraphs 1 and 2 of EASA AD 2020
0270 do not apply to this AD.
3 Paragraph 3 of EASA AD 20200270
specifies revising the approved AMP
within 12 months after its effective date, but this AD requires revising the existing maintenance or inspection program, as applicable, within 90 days after the effective date of this AD.
4 The initial compliance time for doing the tasks specified in paragraph 3 of EASA
AD 20200270 is at the applicable thresholds as incorporated by the requirements of paragraph 3 of EASA AD
20200270, or within 90 days after the effective date of this AD, whichever occurs later.
5 The provisions specified in paragraph 4 of EASA AD 20200270 do not apply to this AD.
6 The Remarks section of EASA AD
20200270 does not apply to this AD.
7 For all airplanes identified in paragraph c of this AD: Where Note 1 in the service information referenced in EASA AD 2020
0270 specifies NBB carbon disc replacement can be accomplished in accordance with SB
A320271242 or VSB 471452717, for this AD use NBB carbon disk replacement must be accomplished in accordance with SB
A320271242.
n New Provisions for Alternative Actions and Intervals After the existing maintenance or inspection program has been revised as required by paragraph l of this AD, no alternative actions e.g., inspections or intervals are allowed unless they are approved as specified in the provisions of the Ref. Publications section of EASA AD
20200270.
o Terminating Action for Certain Requirements of AD 20202110
Accomplishing the actions required by this AD terminates the ALS limitation task 274000000041E for the THSA, as required by paragraph i of AD 20202110, for Model A318111, 112, 121, and 122
airplanes; Model A319111, 112, 113, 114, 115, 131, 132, 133, 151N, and 153N airplanes; Model A320211, 212, 214, 216, 231, 232, 233, 251N, 252N, 253N, 271N, 272N, and 273N airplanes;
and Model A321111, 112, 131, 211, 212, 213, 231, 232, 251N, 251NX, 252N, 252NX, 253N, 253NX, 271N,
E:FRFM13AUP1.SGM

13AUP1