Airworthiness directives › 2017-25-15
AD 2017-25-15 Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes
Models named: ATR42-500, ATR72-212A, ATR42-300, ATR72-202. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to ATR—GIE Avions de Transport Régional airplanes, certificated in any category, identified in paragraphs (c)(1) through (c)(6) of this AD. Note 1 to the introductory text of paragraph (c) of this AD: In EASA AD 2013-0032, dated February 18, 2013, airplanes specified in paragraphs (c)(1) and (c)(2) of this AD are identified as Group 1 airplanes and airplanes specified in paragraphs (c)(3) through (c)(6) of this AD are identified as Group 2 airplanes. (1) Model ATR42-500 airplanes: Manufacturer serial numbers (MSNs) 645, 653, 657, 659, 661, 663, and 665. (2) Model ATR72-212A airplanes: MSNs 778, 994, 995, 996, 998, 999, 1000, and 1020. (3) Model ATR42-300 airplanes: MSNs 348 and 415. (4) Model ATR42-500 airplanes: MSNs 497, 501, and 514. (5) Model ATR72-202 airplanes: MSNs 192, 411, 496, 508, and 509. (6) Model ATR72-212A airplanes: MSNs 468, 568, 595, 662, 796, 920, 926, 950, 1024, 1025, 1028, 1029, 1031, 1032, 1033, 1034, 1035, 1036, 1037, 1039, and 1040.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 6 months after the effective date of this AD, identify the serial number of the DDV as specified in paragraph (g)(1) or (g)(2) of this AD, as applicable. A review of airplane delivery or maintenance records is acceptable to make the identification as required by this paragraph, provided those records can be relied upon for that purpose, and the serial number of the DDV can be conclusively identified from that review. (1) For airplanes identified in paragraphs (c)(1) and (c)(2) of this AD, identify the serial number of the engine DDV part number(P/N) B03AA1060, in accordance with the Accomplishment Instructions of ATR Service Bulletin ATR42-30-0081, Revision 02, dated March 26, 2013; or ATR72-30-1050, Revision 03, dated March 26, 2013; as applicable to airplane model. (2) For airplanes identified in paragraphs (c)(3), (c)(4), (c)(5), and (c)(6) of this AD, identify the serial number of the wing and/or stabilizer DDV, P/N B03AA1031 or B03AA1040, in accordance with the Accomplishment Instructions of ATR Service Bulletin ATR42-30-0080, Revision 02, dated March 26, 2013; or ATR72-30-1049, Revision 03, dated March 26, 2013; as applicable to airplane model.
Unsafe condition
This AD was prompted by an investigation performed on a failed dual distributor valve (DDV) that revealed a nonconformity of crimping on an internal valve. We are issuing this AD to prevent the deflation of the related deicing boot chamber during deicing cycles, which could result in reduced controllability of the airplane in icing conditions.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1