Airworthiness directives › 2021-11-22
AD 2021-11-22 Airworthiness Directives; Airbus Helicopters Deutschland GmbH Helicopters
Applicability*9
This AD replaces AD 2016-11-21, Amendment 39-18548 (81 FR 36137, June 6, 2016).
Compliance
(1) Before further flight, establish a life limit for the tail rotor hub body (hub body), part number (P/N) L642A2003102, of 27,400 hours time-in-service (TIS). If you cannot determine the hub body's TIS, follow the instructions in Table 1, Examples and Calculations, Effectivity: The history of the hub body is not known or can't be identified, in Airbus Helicopters Alert Service Bulletin ASB EC135-04A-012, Revision 0, dated September 11, 2017, except where the service information specifies that you contact the manufacturer, you are required to remove the part from service instead. (2) Before further flight, revise the life limit for each part listed in paragraphs (f)(2)(i) and (ii) of this AD in the Airworthiness Limitations Section (ALS) of the existing maintenance manual for your helicopter and record the revised life limit on the component history card or equivalent record as follows: (i) For swashplate parts: (A) The life limit for the ring (control ring), P/N L623M2001213, is 10,700 hours TIS. (B) The life limit for the cardan ring (two-part), P/N L623M2005205, is 14,300 hours TIS. (C) The life limit for the bolt (control ring), P/N L671M7001215, is 14,300 hours TIS. (D) The life limit for the bolt (sliding sleeve), P/N L623M2006206 and P/N L623M2006213, is 14,300 hours TIS. (ii) For mixing lever gear unit parts: (A) The life limit for the forked lever assembly, P/N L671M3012102, is 10,400 hours TIS. (B) The life limit for the hinged support, P/N L671M7003210, is 19,000 hours TIS. (C) The life limit for the bolt, P/N L671M7001220, is 19,000 hours TIS. (3) Before further flight, remove from service any part listed in paragraphs (f)(1) and (2) of this AD that has reached or exceeded its revised life limit. (4) Thereafter, for any part listed in paragraphs (f)(1) and (2) of this AD that has not reached or exceeded its life limit, continue to record the life limit of the part on its component history card or equivalent record and remove any part listed in paragraphs (f)(1) and (2) of this AD from service before the part has reached or exceeded its revised life limit.
Required actions
Special flight permits are limited to a onetime flight to a maintenance facility to replace a part that has reached its life limit.
Unsafe condition
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
Affected ADs
The FAA is issuing this AD to prevent certain parts from remaining in service beyond their fatigue life, resulting in failure of the part and subsequent loss of control of the helicopter.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1