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Federal Register / Vol. 86, No. 107 / Monday, June 7, 2021 / Rules and Regulations a Effective Date This airworthiness directive AD is effective June 22, 2021.
b Affected ADs None.
c Applicability This AD applies to Leonardo S.p.a. Model AW169 helicopters, certificated in any category, identified in paragraphs c1 and 2 of this AD.
1 Helicopters having serial number 69007, 69009, 69011, 69013, 69014, 69015, 69017, 69018, 69020, 69021, 69022, 69023, 69024, 69025, 69027, 69028, 69031, 69032, 69041, 69042, 69043, 69044, 69049 and 69051.
2 All helicopters equipped with retractable landing gear LG system part number P/N 6F3200F00311 or P/N
6F3200F00411.
d Subject Joint Aircraft Service Component JASC
Code: 3233, Landing Gear Actuator.
e Unsafe Condition This AD was prompted by reports of failed nose landing gear NLG retraction actuators during the acceptance test procedures on the ground on the final assembly line. The FAA
is issuing this AD to address failed NLG and main landing gear MLG retraction actuators.
The unsafe condition, if not addressed, could result in a partially locked or unlocked NLG
or MLG upon landing, possibly resulting in damage to the helicopter and injury to the occupants.

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f Compliance Comply with this AD within the compliance times specified, unless already done.
g Modifications Within 200 hours time-in-service TIS
after the effective date of this AD, do the applicable actions specified in paragraphs g1 through 5 of this AD, in accordance with the applicable part of the Accomplishment Instructions of Leonardo Helicopters Alert Service Bulletin 169023, Revision B, dated April 16, 2018 ASB 169
023, Revision B, except as required by paragraph k of this AD.
1 For helicopters having S/N 69011 and S/N 69017 that are not equipped with retractable LG system P/N 6F3200F00411
enhanced NLG retracting actuator P/N
6F3230V00532 and enhanced MLG retracting actuators P/N 6F3230V00832 and P/N
6F3230V01032: Modify the helicopter which includes replacing the actuators and doing checks and measurements, as specified in Part I of ASB 169023, Revision B.
2 For helicopters having S/N 69007, S/N
69015, S/N 69018, and S/N 69022 that are not equipped with retractable LG system P/
N 6F3200F00411 enhanced NLG retracting actuator P/N 6F3230V00532 and enhanced MLG retracting actuators P/N 6F3230V00832
and P/N 6F3230V01032: Modify the helicopter which includes installing enhanced landing gear retracting actuators and doing checks and measurements, as
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specified in Part II of ASB 169023, Revision B.
3 For helicopters having S/N 69032, S/N
69041, and S/N 69051 that are not equipped with retractable LG system P/N
6F3200F00411 enhanced NLG retracting actuator P/N 6F3230V00532 and enhanced MLG retracting actuators P/N F3230V00832
and P/N 6F3230V01032: Modify the helicopter which includes installing enhanced landing gear retracting actuators and doing checks and measurements, as specified in Part III of ASB 169023, Revision B.
4 For helicopters having S/N 69007, S/N
69009, S/N 69011, S/N 69013, S/N 69014, S/
N 69015, S/N 69017, S/N 69018, S/N 69020, S/N 69021, S/N 69022, S/N 69023, S/N
69024, S/N 69027, S/N 69032, S/N 69041, and S/N 69051: Modify the helicopter which includes modifying the landing gear actuator control box, as specified in Part IV of ASB
169023, Revision B.
5 For helicopters having S/N 69007, S/N
69009, S/N 69011, S/N 69013, S/N 69014, S/
N 69015, S/N 69017, S/N 69018, S/N 69020, S/N 69021, S/N 69022, S/N 69023, S/N
69024, S/N 69025, S/N 69027, S/N 69028, S/
N 69031, S/N 69032, S/N 69041, S/N 69042, S/N 69043, S/N 69044, and S/N 69051:
Modify the helicopter which includes improving the landing gear proximity switch and doing checks and measurements, as specified in Part V of ASB 169023, Revision B.
h Installation Checks For helicopters having S/N 69009, S/N
69013, S/N 69014, S/N 69020, S/N 69021, S/
N 69023, S/N 69024, S/N 69025, S/N 69027, S/N 69028, S/N 69031, S/N 69042, S/N
69043, S/N 69044, and S/N 69049 that are equipped with both retractable LG system P/
N 6F3200F00311 and P/N 6F3200F00411:
Within 200 hours TIS after the effective date of this AD, accomplish installation checks which include measurements, in accordance with Part VI of the Accomplishment Instructions of ASB 169
023, Revision B, except as required by paragraph k of this AD.
i NLG and MLG Up Down Lock Actuator Inspection For helicopters equipped with retractable LG system P/N 6F3200F00311 or P/N
6F3200F00411: At the time specified in paragraph i1 or 2 of this AD, whichever occurs first, inspect the plungers of the NLG
and MLG up down lock actuators, in accordance with Part VII of the Accomplishment Instructions of ASB 169
023, Revision B, except as required by paragraph k of this AD.
1 Within 30 days after the effective date of this AD.
2 Concurrently with the modifications required by paragraphs g1, 2, and 3 of this AD, as applicable.
j Corrective Actions 1 If, during any modification required by paragraph g1, 2, 3, or 5 of this AD, or during any installation check required by paragraph h of this AD, any discrepancy is detected, before further flight, accomplish the applicable corrective actions, in accordance
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with the Accomplishment Instructions of ASB 169023, Revision B, except as required by paragraph k of this AD. For this AD, discrepancies include gaps between parts that are not within tolerances, improperly aligned rotational axis of certain parts, nonparallel lever for certain parts, a certain pin is not installed on the MLGs, and incorrect thickness of certain washers.
2 If, during any inspection required by paragraph i of this AD, corrosion is detected, before further flight, accomplish the applicable corrective action and apply corrosion inhibitor on the plungers of the NLG and MLG up down lock actuators, in accordance with Part VII of the Accomplishment Instructions of ASB 169
023, Revision B, except as required by paragraph k of this AD.
3 If, during any inspection required by paragraph i of this AD, no corrosion is detected, before further flight, apply corrosion inhibitor on the plungers of the NLG and MLG up down lock actuators, in accordance with Part VII of the Accomplishment Instructions of ASB 169
023, Revision B, except as required by paragraph k of this AD.
k Service Information Exceptions 1 Where ASB 169023, Revision B, specifies to discard certain parts, this AD
requires removing those parts from service.
2 Where ASB 169023, Revision B, specifies to contact the manufacturer, before further flight, repair using a method approved by the Manager, International Validation Branch, FAA. For a repair method to be approved by the Manager, International Validation Branch, as required by this paragraph, the Managers approval letter must specifically refer to this AD.
3 Where ASB 169023, Revision B, specifies to return certain parts, this AD does not include that requirement.
l No Reporting Requirement Although ASB 169023, Revision B, specifies to submit certain information to the manufacturer, this AD does not include that requirement.
m Credit for Previous Actions 1 This paragraph provides credit for actions required by paragraphs g, h, i, and j of this AD, if those actions were performed before the effective date of this AD
using Leonardo Helicopters Alert Service Bulletin 169023, dated May 31, 2017, provided that, for helicopters on which Part V of that service information was accomplished, the adhesive fixing of the NLG
and MLG support buffers is replaced within 3 months after the effective date of this AD.
The replacement must be done in accordance with steps 1., 2., 8.3, 8.4, 18., and 20. of Part V of the Accomplishment Instructions of ASB 169023, Revision B, except as specified in paragraph k of this AD.
2 This paragraph provides credit for actions required by paragraphs g, h, i, and j of this AD, if those actions were performed before the effective date of this AD
using Leonardo Helicopters Alert Service Bulletin 169023, Revision A, dated September 1, 2017.

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