Interim Report - Introduction - EASA

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INTERIM REPORT – OPTIONS FOR CHANGE – ATTACHMENT A <strong>EASA</strong>.2009.OP.21 2 Study Team survey questionnaires 2.1 National Authorities Only 7 of the 12 NAAs questionnaire respondents answered the questions 1,2 on the number of occurrences related to improper de-icing / anti-icing, or anti-icing fluids residues between the Winter seasons 2005/2006 and 2009/2010. − 4 of 7 NAAs mentioned they experienced occurrences related to improper de-icing / anti-icing within the analysed period (Austria: 3, Switzerland: 3, Spain: 3, Iceland: 1). − 3 of 7 NAAs mentioned they experienced occurrences related to anti-icing fluids residues within the analysed period (Hungary: 1, Switzerland: 9, Iceland: 1). 2.2 Operators 11 out of the 26 operators who responded to the questionnaires mentioned they experienced incidents related to improper de-icing / anti-icing 3 . The same number (11 operators) stated being subject to events related to anti-icing fluids residues. However, it was not possible to differentiate between in-flight incidents and findings of residues during maintenance and cleaning. 2.3 Manufacturers Responses from the manufacturers are encouraging with regard to reducing numbers of occurrences caused by frozen re-hydrated residues since 2005. − Airbus reported no in-flight incidents and only two events of stiff rudders found during ground checks. − ATR only reported one incident, and that was in 2006. − BAE Systems statistics clearly show a dramatic reduction in annual occurrences, with 87 in year 2004/05, and only 7 in 2008/09. Whereas before 2005, 25% of reports 1 NAA Questionnaire – Question 1.4: Indicate the number of reported occurrences related to inappropriate standards of de-/anti-icing: 2 NAA Questionnaire – Question 1.5: Indicate the number of reported occurrences related to anti-icing fluids residues: 3 Aircraft Operator Questionnaire – Question 1.6: How many events, occurrences, or incidents due to residues and/or incorrect de/anti-icing has your airline experienced since and including the 2005/06 winter season? airsight GmbH - 2 -
INTERIM REPORT – OPTIONS FOR CHANGE – ATTACHMENT A <strong>EASA</strong>.2009.OP.21 concerned “ice in gaps” and since 2005 there have been none. This may, however, be due to a change in diagnosis. − Boeing reported that, prior to 2005, they had more occurrences per year of gel residue build-up than they have had in total since 2005. They attribute the new Potassium and Sodium-based Runway De-icing Fluids as contributing to the residues. − Bombardier stated that the “classic” residue incidents have reduced with time, and only a handful have occurred in the past 5 years. All the manufacturers attribute the fall in incidents and occurrences to: − raised awareness, − recommendations to use Type I and the two-step procedure (NB: there’s no evidence that operators are actually complying with these recommendations), and − implementation of inspection programmes and regular cleaning. airsight GmbH - 3 -
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Research Project EASA.2009/4 Regula
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EASA.2009.OP 21 Study on the regula
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INTERIM REPORT - INTRODUCTION EASA.
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INTERIM REPORT - DATA SUMMARY AND A
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