Airworthiness directives › 2013-20-01
AD 2013-20-01 Airworthiness Directives; Agusta S.p.A. (Type Certificate Currently Held by AgustaWestland S.p.A) (Agusta) Helicopters
Applicability*9
This AD becomes effective December 5, 2013.
Compliance
(1) The Manager, Safety Management Group, FAA, may approve AMOCs for this AD. Send your proposal to: Chinh Vuong, Aviation Safety Engineer, Safety Management Group, Rotorcraft Directorate, FAA, 2601 Meacham Blvd., Fort Worth, Texas 76137; telephone (817) 222-5110; email chinh.vuong@faa.gov . (2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, we suggest that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office, before operating any aircraft complying with this AD through an AMOC.
Required actions
(1) The subject of this AD is addressed in European Aviation Safety Agency (EASA) AD No. 2009-0037-E, dated February 19, 2009. You may view the EASA AD on the internet in the AD Docket at http://www.regulations.gov .
Unsafe condition
Within 30 days: (1) For Model A109A helicopters, revise the Power Plant Limitations section, page 1-7, of the Model A109A Rotorcraft Flight Manual (RFM) by inserting page 5 of Agusta Bollettino Tecnico No. 109-129, dated February 16, 2009 (BT 109-129). (2) For Model A109AII helicopters, revise the Power Plant Limitations section, page 1-6, of the Model A109AII RFM by inserting page 6 of BT 109-129. (3) For Model A109C helicopters, revise the Power Plant and Transmission Limitations section, page 1-8, of the Model A109C RFM by inserting page 7 of BT 109-129. (4) Install a placard on the instrument panel adjacent to the Engine and Rotor RPM Power Turbine (N2) Indicator that states: MIN. CONT. 97% N 2 —MIN. TRANS. 95% N 2 .
Affected ADs
This AD defines the unsafe condition as a third stage turbine vibration, which could result in turbine failure, engine power loss, and subsequent loss of control of the helicopter.
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