 The first quarter after Saprang was appointed Chairman , AoT profits plunged 90 % compared to the previous year , despite higher traffic volumes and increased passenger service charters and airline fees . Operating expenses surged 137 % , contributing to the AoT 's worst quarterly earnings report since it was listed on the Stock Exchange of Thailand . 
 The first quarter after Saprang was appointed Chairman , AoT profits<a href='been_done' title='1'><mark></mark></a> plunged 90 % compared to the previous year , despite higher traffic volumes and increased passenger service charters and airline fees . Operating expenses<a href='been_done' title='2'><mark></mark></a> surged 137 % , contributing to the AoT <a href='null_genetive' title='3'><mark>'s</mark></a>worst quarterly earnings report since it was listed on the Stock Exchange of Thailand . 
The first quarter after Saprang was appointed Chairman , AoT profits been plunged 90 % compared to the previous year , despite higher traffic volumes and increased passenger service charters and airline fees . Operating expenses been surged 137 % , contributing to the AoT  worst quarterly earnings report since it was listed on the Stock Exchange of Thailand .