Airworthiness directives › 2020-20-04
AD 2020-20-04 Airworthiness Directives; Rolls-Royce Corporation (Type Certificate Previously Held by Allison Engine Company) Turboprop Engines
Applicability*9
This AD applies to all Rolls-Royce Corporation (RRC) AE 2100D3 model turboprop engines.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 30 days after the effective date of this AD, revise the RRC AE 2100D3 Maintenance Manual (“the Manual”) and the operator's existing approved continuous airworthiness maintenance program by inserting: (i) Task 05-11-00-800-801, dated June 20, 2018, into Airworthiness Limitations System Description Section-801; and (ii) Task 05-12-11-800-802, dated June 1, 2020, into Propeller Gearbox System Component Life Limits Systems Description Section-802 in the Manual. (2) Thereafter, except as provided in paragraph (h) of this AD, no alternative replacement times or structural inspection intervals may be approved for this PGB shaft and carrier assembly.
Unsafe condition
This AD was prompted by a fatigue crack that initiated in the propeller shaft during a propeller gearbox (PGB) development test that induced high vibrations. The FAA is issuing this AD to prevent loss of the propeller. The unsafe condition, if not addressed, could result in damage to the engine and damage to the airplane.
Affected ADs
None.
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