Airworthiness directives › 2013-22-22
AD 2013-22-22 Airworthiness Directives; Turbomeca S.A. Turboshaft Engines
Applicability*9
This AD applies to all Turbomeca S.A. Arriel 2D turboshaft engines.
Compliance
If before the effective date of this AD, you complied with Turbomeca S.A. Alert MSB No. A292 73 2847, Version A, dated May 29, 2012, you met the initial replacement requirements specified in paragraph (e) of this AD. However, you must still comply with the repetitive inspection requirements of this AD.
Required actions
After the effective date of this AD, do not install any HMU onto any engine, or install any engine onto any helicopter, unless the HMU is in compliance with this AD.
Unsafe condition
Comply with this AD within the compliance times specified, unless already done. (1) Replace inter-pump complete sleeve, and visually inspect the complete sleeve female splines and HMU high-pressure (HP) pump and low-pressure (LP) pump male splines for corrosion, scaling, cracks, and wear, at the following: (i) Before exceeding 400 HMU operating hours since new if the HMU has 375 or fewer operating hours on the effective date of this AD; or (ii) Within 25 HMU operating hours if the HMU has more than 375 operating hours on the effective date of this AD. (iii) Thereafter, at intervals not to exceed 400 HMU operating hours. (iv) Guidance on replacing the complete sleeve and inspecting the complete sleeve female splines, and HP and LP male splines, can be found in Turbomeca Technical Instruction No. 292 73 2847. (v) If the HMU does not pass the initial or repetitive visual inspections required by paragraph (e)(1) of this AD, then before the next flight, replace the affected HMU with an HMU eligible for installation. (2) Replace the rotating components of the HP and LP pumps, including the complete sleeve, or replace the HMU with an HMU eligible for installation at the following: (i) Before exceeding 800 HMU operating hours since new; or (ii) Within 800 HMU operating hours since last replacement of LP and HP fuel pumps rotating components; whichever occurs later. (iii) Thereafter, replace the LP and HP fuel pump rotating components or the HMU within every 800 HMU operating hours. (iv) Guidance for completing the requirements of paragraph (e)(2) can be found in Turbomeca S.A. Alert Mandatory Service Bulletin (MSB) No. A292 73 2847.
Affected ADs
This AD supersedes AD 2013-01-07, Amendment 39-17321 (78 FR 6725, January 31, 2013).
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