Airworthiness directives › 2017-09-12
AD 2017-09-12 Airworthiness Directives; ATR-GIE Avions de Transport Régional Airplanes
Models named: ATR42-500, ATR72-102, -202, -212, -212A. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to the ATR-GIE Avions de Transport Régional airplanes, certificated in any category, identified in paragraphs (c)(1) and (c)(2) of this AD. (1) Model ATR42-500 airplanes, all manufacturer serial numbers (MSNs), except those on which ATR Modification 6780 has been embodied in production. (2) Model ATR72-102, -202, -212, and -212A airplanes, all MSNs on which ATR Modification 3715 has been embodied in production, except those on which ATR Modification 6780 has been embodied in production.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 12 months after the effective date of this AD, inspect each EPSU on the airplane to determine the part number (P/N) and serial number. For any EPSU having P/N 301-3100 Amendment (Amdt) A and a serial number identified in figure 1 to paragraph (g) of this AD, and that does not have a control sticker marked with “SIL 301-3100-33-001”: Except as provided by paragraph (i) of this AD, before further flight, replace the EPSU with a serviceable unit, as specified in paragraph (h) of this AD, in accordance with the Accomplishment Instructions of ATR Service Bulletin ATR42-33-0050, Revision 03, dated May 25, 2016; or Service Bulletin ATR72-33-1043, Revision 03, dated July 20, 2016; as applicable. A review of airplane maintenance records may be done in lieu of inspection of the EPSUs on the airplane if the part number and serial number of each EPSU can be positively determined from that review. Figure 1 to Paragraph ( g ) of This AD—Affected Serial Numbers of EPSU P/N 301-3100 Amdt A Affected Serial Numbers of EPSU P/N 301-3100 Amdt A 2905 4929 4960 4994 5025 5077 5113 5156 2906 4930 4961 4995 5026 5079 5114 5157 3401 4931 4962 4996 5027 5080 5115 5158 3697 4932 4963 4997 5028 5081 5116 5159 3825 4933 4964 4998 5029 5082 5117 5160 4343 4934 4965 4999 5031 5083 5118 5161 4420 4935 4966 5000 5032 5084 5119 5162 4634 4936 4967 5001 5033 5085 5120 5163 4706 4937 4968 5002 5034 5086 5121 5164 4707 4938 4969 5003 5038 5087 5122 5166 4708 4939 4970 5004 5041 5088 5123 5171 4709 4940 4971 5005 5042 5089 5124 5172 4710 4941 4972 5006 5046 5090 5125 5173 4711 4942 4973 5007 5047 5091 5126 5174 4712 4943 4976 5008 5050 5092 5127 5175 4713 4944 4977 5009 5052 5096 5128 5176 4714 4945 4978 5010 5054 5097 5129 5177 4715 4946 4979 5011 5055 5098 5130 5178 4716 4947 4980 5012 5056 5099 5131 5179 4717 4948 4981 5013 5058 5100 5132 5180 4718 4949 4982 5014 5059 5101 5133 5181 4719 4950 4983 5015 5065 5103 5134 5182 4720 4951 4984 5016 5067 5104 5135 5183 4721 4952 4985 5017 5068 5105 5136 5184 4722 4953 4986 5018 5069 5106 5138 5185 4723 4954 4987 5019 5070 5107 5139 5186 4724 4955 4988 5020 5071 5108 5140 5187 4745 4956 4989 5021 5072 5109 5147 None 4926 4957 4990 5022 5073 5110 5153 None 4927 4958 4991 5023 5075 5111 5154 None 4928 4959 4993 5024 5076 5112 5155 None
Unsafe condition
This AD was prompted by reports of failure of emergency power supply units (EPSUs) in production and in service. We are issuing this AD to detect and correct defective internal electronic components, which could adversely affect the EPSU internal battery. This condition could result in a partial or total loss of emergency lighting, possibly affecting passenger evacuation during an emergency situation.
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