# Ntsbs findings revealed that flight 4184 experienced

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aircraft nose-up elevator and high airspeed (NTSB, 1996). NTSB’s findings revealed that Flight 4184 experienced combinations of the both rime and clear airframe icing in supercooled cloud and rain drops, where some drops were estimated to range from 100 to 2000 microns in diameter (NTSB, 1996). The aircraft design flaw was also part of the contributing factor and the accident aircraft model, ATR 72, has also experienced aileron hinge moment reversal during its development stage (NTSB, 1996). ATR has also recognized that accumulation of ice outside the deice boots will cause the instability of the ailerons (NTSB, 1996). The ATR failed to disseminate proper information and warnings to operators about the adverse features of the ailerons reversal and techniques to recover from the condition has led to the accident. Also, ATR also failed develop adequate amendments to improve the aircraft design (NTSB, 1996). 2. Did the (BEA), the French Bureau Enquetes Accidents, agree with the report? According to the second volume of the accident report, the BEA disagreed with majority sections of the report, including the Analysis, Conclusions, and Probable Causes (NTSB, 1996). Besides that, the BEA has proposed several changes to the Recommendations as they did not agree with what the NTSB has suggested (NTSB, 1996). 3. Do you agree with the recommendations? In this case, references are not required. Yes. The NTSB has provided several recommendations that could help in preventing future occurrence of the icing conditions in the ATR aircraft and other relevant aspects. For example, the NTSB recommended that the FAA should revise their icing