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Federal Register / Vol. 86, No. 47 / Friday, March 12, 2021 / Rules and Regulations
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 39AIRWORTHINESS
DIRECTIVES
1. The authority citation for part 39
continues to read as follows:

Authority: 49 U.S.C. 106g, 40113, 44701.
39.13

Amended
2. The FAA amends 39.13 by removing Airworthiness Directive AD
20162305, Amendment 3918712 81
FR 85126, November 25, 2016, and adding the following new AD:

20210505 Airbus Helicopters:
Amendment 3921448 Docket No. FAA
20201123; Project Identifier MCAI
202001294R.
a Effective Date This airworthiness directive AD is effective April 16, 2021.
b Affected ADs This AD replaces AD 20162305, Amendment 3918712 81 FR 85126, November 25, 2016 AD 20162305.
c Applicability This AD applies to Airbus Helicopters Model SA365N1, AS365N2, AS 365 N3, SA366G1, EC 155B, and EC155B1
helicopters, certificated in any category, all serial numbers.
d Subject Joint Aircraft System Component JASC
Code 65, Tail Rotor.
e Reason This AD was prompted by reports of occurrences of loss of yaw control due to failure of the tail gearbox TGB control rod double bearing bearing. This AD was also prompted by the determination that additional inspections, replacements, and modifications are necessary to address the unsafe condition. The FAA is issuing this AD
to address damage to the bearing, which could result in end play, loss of tail rotor pitch control, and subsequent loss of control of the helicopter.
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, European Aviation Safety Agency now European Union Aviation
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Safety Agency EASA AD 20170125, dated July 21, 2017 EASA AD 20170125.
h Exceptions to EASA AD 20170125
1 Where EASA AD 20170125 refers to its effective date, this AD requires using the effective date of this AD.
2 Where EASA AD 20170125 refers to June 4, 2011 the effective date of EASA AD
20110105, this AD requires using the effective date of this AD.
3 Where EASA AD 20170125 refers to May 25, 2016 the effective date of EASA AD
20160197R1, this AD requires using the effective date of this AD.
4 The Remarks section of EASA AD
20170125 does not apply to this AD.
5 Where paragraph 2 of EASA AD 2017
0125 requires inspections checks to be done in accordance with the instructions of Paragraph 3.B.1 of the applicable inspection ASB, for this AD, those instructions are for reference only and are not required for the actions in paragraph 2 of EASA AD 2017
0125. The inspections checks required by paragraph 2 of EASA AD 20170125 may be performed by the owner/operator pilot holding at least a private pilot certificate and must be entered into the aircraft records showing compliance with this AD in accordance with 14 CFR 43.9 a1 through 4 and 14 CFR 91.417a2v. The record must be maintained as required by 14 CFR
91.417, 121.380, or 135.439.
6 Where paragraph 5 of EASA AD 2017
0125 specifies to accomplish the applicable corrective actions in accordance with the instructions of Paragraph 3.B.1 of the applicable inspection ASB, for this AD, a qualified mechanic must add oil to the TGB
to the max level if the oil level is not at maximum. The instructions are for reference only and are not required for the actions in paragraph 5 of EASA AD 20170125.
7 Where EASA AD 20170125 refers to flight hours FH, this AD requires using hours time-in-service.
8 Where EASA AD 20170125 requires action after the last flight of the day or ALF, this AD requires those actions before the first flight of the day.
9 Where the service information referred to in EASA AD 20170125 specifies to perform a metallurgical analysis and contact the manufacturer if collected particles are not clearly characterized, this AD does not require contacting the manufacturer to determine the characterization of the particles collected.
10 Although service information referenced in EASA AD 20170125 specifies to scrap parts, this AD does not include that requirement.
11 Although service information referenced in EASA AD 20170125 specifies reporting information to Airbus Helicopters and filling in a particle detection followup sheet, this AD does not include those requirements.
12 Although service information referenced in EASA AD 20170125 specifies returning certain parts to an approved workshop, this AD does not include that requirement.
13 Where paragraph 6 of EASA AD
20170125 refers to any discrepancy, for
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this AD, discrepancies include the presence of particles and other conditions such as abrasions, scales, flakes, and splinters.
i Alternative Methods of Compliance AMOCs 1 The Manager, Strategic Policy Rotorcraft Section, 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 Strategic Policy Rotorcraft Section, send it to: Manager, Strategic Policy Rotorcraft Section, FAA, 10101 Hillwood Pkwy., Fort Worth, TX
76177; telephone 8172225110. Information may be emailed to: 9-ASW-FTW-AMOCRequests@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.
j Related Information For more information about this AD, contact Kathleen Arrigotti, Aviation Safety Engineer, Large Aircraft Section, International Validation Branch, FAA, 2200
South 216th St., Des Moines, WA 98198;
telephone and fax 2062313218; email kathleen.arrigotti@faa.gov.
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. 552a 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 European Aviation Safety Agency EASA AD 20170125, dated July 21, 2017.
ii Reserved.
3 For EASA AD 20170125, contact the 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 service information at the FAA, Office of the Regional Counsel, Southwest Region, 10101 Hillwood Pkwy., Room 6N321, Fort Worth, TX 76177. For information on the availability of this material at the FAA, call 8172225110. This material may be found in the AD docket on the internet at https www.regulations.gov by searching for and locating Docket No.
FAA20201123.
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.

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