Airworthiness Directive · Amendment 39-18779 · Engine exhaust
Diamond Aircraft Industries GmbH Airplanes
Superseded. A later AD replaced this one: AD 2018-10-10. Comply with the one in force.
This AD applies to Diamond Aircraft Industries GmbH DA 42 airplanes, serial numbers 42.004 through 42.427 and 42.AC001 through 42.AC151, that have a TAE 125-02-99 or TAE 125-02-114 engine installed, are equipped with an exhaust pipe, DAI part number (P/N) D60-9078-06-01, or Technify P/Ns 52-7810-H0001 02, 52-7810-H0001 03, or 52-7810-H0001 04, and are certificated in any category.
We are adopting a new airworthiness directive (AD) for certain Diamond Aircraft Industries GmbH Model DA 42 airplanes. This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as an uncommanded engine shutdown during flight due to failure of the propeller regulating valve caused by hot exhaust gases escaping from fractured engine exhaust pipes. We are issuing this AD to require actions to address the unsafe condition on these products.
Unless already done, do one of the actions in either paragraph (f)(1) or (2) of this AD. For the purpose of this AD, if the flight hours accumulated since first installation of an affected exhaust pipe is not known, use the total hours time-in-service (TIS) accumulated on the airplane.
Note 1 to paragraph (f) of this AD: The NPRM for this AD proposed to require both the installation of clamps and the replacement of the exhaust pipes. This AD only requires one or the other.
(1) At the following compliance times, install additional exhaust pipe clamps following section III.2 of the INSTRUCTIONS section of Diamond Aircraft Industries GmbH Work Instruction WI-MSB 42-120, dated June 24, 2016, as specified in the Accomplishments/Instructions paragraph of Diamond Aircraft Industries GmbH Mandatory Service Bulletin MSB 42-120, dated June 24, 2016, or Diamond Aircraft
Industries GmbH Mandatory Service Bulletin MSB 42-120/1, dated November 10, 2016.
(i) If the affected exhaust pipe has 1,300 hours TIS or less since first installed on an airplane as of February 22, 2017 (the effective date of this AD): Before or upon accumulating 1,500 hours TIS since the affected exhaust pipe was first installed on an airplane.
(ii) If the affected exhaust pipe has more than 1,300 hours TIS since first installed on an airplane as of February 22, 2017 (the effective date of this AD): Within the next 200 hours TIS after February 22, 2017 (the effective date of this AD) or within the next 12 months after February 22, 2017 (the effective date of this AD), whichever occurs first.
(2) At the following compliance times, replace the exhaust pipes listed in paragraph (c) of this AD with an exhaust pipe DAI P/N D60-9078-06-01_01 or Technify P/N 52-7810-H0014 01 following section III.1 of the INSTRUCTIONS section of Diamond Aircraft Industries GmbH Work Instruction WI-MSB 42-120, dated June 24, 2016, as specified in the Accomplishments/Instructions paragraph of Diamond Aircraft Industries GmbH Mandatory Service Bulletin MSB 42-120, dated June 24, 2016, or Diamond Aircraft Industries GmbH Mandatory Service Bulletin MSB 42-120/1, dated November 10, 2016.
(i) If the affected exhaust pipe has 1,300 hours TIS or less since first installed on an airplane as of February 22, 2017 (the effective date of this AD): Before or upon accumulating 1,500 hours TIS since the affected exhaust pipe was first installed on an airplane.
(ii) If the affected exhaust pipe has more than 1,300 hours TIS since first installed on an airplane as of February 22, 2017 (the effective date of this AD): Within the next 200 hours TIS after February 22, 2017 (the effective date of this AD) or within the next 12 months after February 22, 2017 (the effective date of this AD), whichever occurs first.
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
