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Federal Register / Vol. 86, No. 171 / Wednesday, September 8, 2021 / Rules and Regulations 20211605 Airbus Helicopters:
Amendment 3921667; Docket No.
FAA20210379; Project Identifier MCAI202100068R.
a Effective Date This airworthiness directive AD is effective October 13, 2021.
b Affected ADs This AD replaces AD 20161251, Amendment 3918578 81 FR 43479, July 5, 2016 AD 20161251.
c Applicability This AD applies to all Airbus Helicopters Model AS332L2 and EC225LP helicopters, certificated in any category.
d Subject Joint Aircraft System Component JASC
Code 6320, Main Rotor Gearbox.
e Reason This AD was prompted by an accident involving a Model EC225LP helicopter in which the main rotor hub detached from the main gearbox. The FAA is issuing this AD to address failure of the main rotor system, which would result in loss of control of the helicopter.
f Compliance Comply with this AD within the compliance times specified, unless already done.

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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, European Union Aviation Safety Agency EASA AD 20170134R2, dated April 16, 2020 EASA AD 2017
0134R2.
h Exceptions to EASA AD 20170134R2
1 Where EASA AD 20170134R2 refers to the effective dates specified in paragraphs h1i through v of this AD, this AD
requires using the effective date of this AD.
i The effective date of EASA AD 2017
0134R2.
ii October 13, 2016 the effective date of EASA AD 20160199, dated October 7, 2016.
iii March 20, 2017 the effective date of EASA AD 20170050E, dated March 17, 2017.
iv June 30, 2017 the effective date of EASA AD 20170111, dated June 23, 2017.
v August 1, 2017 the effective date of EASA AD 20170134, dated July 27, 2017.
2 The Remarks section of EASA AD
20170134R2 does not apply to this AD.
3 Where any service information referred to in EASA AD 20170134R2 specifies to discard certain parts after they have been removed from the helicopter, this AD
requires removing those parts from service.
4 Where paragraph 2 of EASA AD 2017
0134R2 specifies to replace a part before exceeding the applicable new service life limit, this AD requires removing that part from service.
5 Where any service information referred to in EASA AD 20170134R2 specifies to
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return certain parts to the manufacturer, including for overhaul, after they have been removed from the helicopter, this AD does not include that requirement.
6 Where EASA AD 20170134R2 refers to flight hours FH, this AD requires using hours time-in-service.
7 Where any service information referred to in EASA AD 20170134R2 specifies to perform a metallurgical analysis and contact the manufacturer if unsure about the characterization of the particles collected, this AD does require characterization of the particles collected, however this AD does not require contacting the manufacturer to determine the characterization of the particles collected.
8 Where EASA AD 20170134R2 requires actions during each after last flight of the day ALF inspection, this AD requires those actions before the first flight of each day.
9 Where any service information referred to in EASA AD 20170134R2 specifies to do the actions identified in paragraphs h9i through iv of this AD, this AD does not include those requirements.
i Watch a video for removing the grease from the full flow magnetic plug FFMP, using a cleaning agent, and collecting particles.
ii Return affected planetary gear assembly to the manufacturer for module overhaul.
iii Contact the approved repair station/
Airbus Helicopters if the reason for a repair to an epicyclic module is unknown and inform/contact Airbus Helicopters.
iv Contact the approved repair station/
Airbus Helicopters depending on who performed the last overhaul RG to determine if a repair has been done on the second stage planet gears since new.
10 Where any service information referred to in EASA AD 20170134R2
specifies that retrofit of the planet gear of the main gearbox MGB can only be done by Airbus Helicopters or Airbus Helicopters approved repair centers, this AD does not require that the retrofit of the planet gear be done only by Airbus Helicopters or Airbus Helicopters approved repair centers. For this AD the retrofit can also be done by an FAAapproved repair station.
11 Where paragraph 5 of EASA AD
20170134R2 specifies accomplishing the FFMP additional work within 3 months after August 1, 2017, this AD requires accomplishing the FFMP additional work within 4 months after the effective date of this AD.
12 Where paragraph 6 of EASA AD
20170134R2 specifies to inform all flight crews and, thereafter, operate the helicopter accordingly, this AD does not require those actions.
13 Where any service information referred to in EASA AD 20170134R2
specifies that if any 16NCD13 particles are found you are to take a 1-liter sample of oil and send it to the manufacturer, this AD does not require those actions.
14 Where any service information referred to in EASA AD 20170134R2
specifies Do not resume flights until corrective actions are agreed by Airbus Helicopters, or to contact Airbus Helicopters before resuming flights if
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further particles are collected during the close monitoring period for this AD, you must repair before further flight using a method specified in paragraph h14i or ii of this AD.
i In accordance with FAA approved procedures.
ii The procedures specified in Appendix 4.A., Particle Analysis, of Airbus Helicopters Emergency Alert Service Bulletin 05A049, Revision 6, dated July 25, 2017; or Emergency Alert Service Bulletin 05.01.07, Revision 6, dated July 27, 2017, as applicable, except as required by paragraphs h5, 7, and 13 of this AD.
15 Where the service information identified in EASA AD 20170134R2
specifies to report inspection results to Airbus Helicopters, for this AD, report the inspection results at the applicable time specified in paragraph h15i or ii 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 date of 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.
i Credit for Previous Actions 1 This paragraph provides credit for the actions specified in paragraph 4 of EASA
AD 20170134R2, if those actions were performed before the effective date of this AD
using Airbus Helicopters Emergency Alert Service Bulletin 63.00.83 or 63A030, both Revision 1, both dated October 7, 2016.
2 Corrective actions for the inspections required by paragraphs 8 and 10 of EASA
AD 20170134R2 accomplished on a helicopter before the effective date of this AD, in accordance with Paragraph 3.B. and Appendix 4.A. of the Accomplishment Instructions of the applicable Airbus Helicopters service information specified in paragraphs i2i through viii of this AD, as applicable, are acceptable to comply with the requirements of paragraph 11 of EASA
AD 20170134R2 for that helicopter, but only for the corrective actions for the inspections required by paragraphs 8 and 10 of EASA
AD 20170134R2.
i Emergency Alert Service Bulletin 05.01.07, Revision 2, dated October 7, 2016.
ii Emergency Alert Service Bulletin 05.01.07, Revision 3, dated February 25, 2017.
iii Emergency Alert Service Bulletin 05.01.07, Revision 4, dated March 17, 2017.
iv Emergency Alert Service Bulletin 05.01.07, Revision 5, dated June 23, 2017.
v Emergency Alert Service Bulletin 05A049, Revision 2, dated October 7, 2016.
vi Emergency Alert Service Bulletin 05A049, Revision 3, dated February 25, 2017.
vii Emergency Alert Service Bulletin 05A049, Revision 4, dated March 17, 2017.
viii Emergency Alert Service Bulletin 05A049, Revision 5, dated June 23, 2017.
j Special Flight Permit Special flight permits, as described in 14
CFR 21.197 and 21.199, are prohibited.

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