Airworthiness Directive · Amendment 39-21974 · Flight control system
Diamond Aircraft Industries GmbH Airplanes
This AD applies to Diamond Aircraft Industries GmbH Model DA 42, DA 42 M-NG, and DA 42 NG airplanes, all serial numbers, certificated in any category, with a flap bell crank part number (P/N) D60-2757-11-00, up to and including revision “f” installed.
The FAA is superseding Airworthiness Directive (AD) 2017-18- 10, which applied to certain Diamond Aircraft Industries GmbH (DAI) Model DA 42, DA 42 M-NG, and DA 42 NG airplanes. AD 2017-18-10 required modifying the flap control system, repetitively inspecting the flap bell crank, and replacing the flap bell crank as necessary. Since the FAA issued AD 2017-18-10, the European Union Aviation Safety Agency (EASA) superseded its mandatory continuing airworthiness information (MCAI) to correct an unsafe condition on these products. This AD retains the actions required by AD 2017-18-10, expands the applicability, and prohibits the installation of certain flap bell cranks. The FAA is issuing this AD to address the unsafe condition on these products.
(1) Comply with paragraph (g)(2) or (3) of this AD at whichever compliance time in paragraph (g)(1)(i) or (ii) of this AD occurs later.
(i) Before the flap bell crank accumulates 600 hours time-in-service (TIS); or
(ii) Within 100 hours TIS after the effective date of this AD or within 6 months after the effective date of this AD, whichever occurs first.
(2) For airplanes with a flap bell crank revision “e” or “f”: Inspect the flap bell crank P/N D60-2757-11-00 for cracks and deformation and modify the flap control system by installing two spacers, P/N DS BU2-10-06-0065-C, by following section III Instructions in Diamond Aircraft Industries GmbH Work Instruction WI-MSB 42-126 and WI-MSB 42NG-066, Revision 1, dated November 14, 2019 (issued as one document) attached to Diamond Aircraft Mandatory Service Bulletin MSB 42-126/1 and MSB 42NG-066/1, dated November 14, 2019 (issued as one document).
(i) If there is a crack or any deformation, you must replace the flap bell crank with P/N D60-2757-11-00_01, as required by step 6 of the Instructions, before further flight.
(ii) If there are no cracks and no deformation, repeat the inspection (not the modification) at intervals not to exceed 200 hours TIS until the flap bell crank is replaced with flap bell crank P/N D60-2757-11-00_01.
(3) For airplanes with a flap bell crank up to revision “d”: Replace the flap bell crank with P/N D60-2757-11-00_01 in accordance with section III Instructions in Diamond Aircraft Industries GmbH Work Instruction WI-MSB 42-126 and WI-MSB 42NG-066, Revision 1, dated November 14, 2019 (issued as one document) attached to Diamond Aircraft Mandatory Service Bulletin MSB 42-126/1 and MSB 42NG-066/1, dated November 14, 2019 (issued as one document).
As of the effective date of this AD, do not install on any airplane a flap bell crank P/N D60-2757-11-00 with a revision up to and including revision “d.”
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Aircraft
