September 2019 • Increase in gross profit was mainly derived from the following reasons: 1. Engineering service (“EN”) had an increase in gross profit for Baht 53 million because of no revision of estimated

revision becomes effective, we agree to abide by the revised Standard Procedures or the Manuals as well. 1 . 2 We acknowledge and agree that upon electronic submission of information to the SEC Office’s

SEC Office revises the Standard Procedures or the Manuals and notifies us in advance as deemed appropriate before such revision becomes effective, we agree to abide by the revised Standard Procedures or

in all aspects. In the event that the SEC Office revises the Standard Procedures or the Manuals and notifies us in advance as deemed appropriate before such revision becomes effective, we agree to

operations and had strong financial position. As at December 31, 2018, the consolidated current ratio was 1.93 times, slightly increased from 1.81 times in 2017. The quick ratio in 2018 was 0.72 times

ratio was 2.95 times, increased from 1.93 times in 2018. The quick ratio in 2019 was 0.99 times, increased from 2018 at 0.72 times. The cash ratio of the Company was 0.82 time, slightly decreased from

operations and had strong financial position. As at September 30, 2017, the consolidated current ratio was 1.81 times, slightly increased from 1.54 times as at December 31, 2016. The quick ratio as at

Ratio 1 (times) 1.63 1.54 1.81 Quick Ratio 2 (times) 0.53 0.37 0.57 Cash Ratio 3 (times) 0.67 0.68 0.80 Account Receivable Turnover 4 (times) 17.65 17.27 17.78 Average Collection Period 5 (days) 20 21 20

, 2020, the consolidated current ratio was 2. 20 times, decreased from 2.95 times as at December 31, 2019. The quick ratio was 0.93 time, slightly decreased from December 31, 2019 at 0.99 time. Short-term

competitiveness in the fast moving aviation industry. (October 2018) 8. The Company has been certified by the International Air Transport Association’s Operational Safety Audit (IOSA) for the 6th time. The renewal