LAHORE - PML-N Quaid Mian Muhammad Nawaz Sharif has decided in principle to challenge the controversial convictions in the cases of plane hijacking and helicopter tax evading by filing separate appeals in Supreme Court next week According to sources, Nawaz Sharif held an important meeting on Monday with the team of his legal experts including senior lawyer of Supreme Court Abid Hassan Minto, Khawaja Haris, former advocate general Punjab Ashtar Ausaf Ali, Raja Farooq advocate and AK Dogar Advocate. The lawyers think tank conducted top-to-bottom review of the legalities involved in the both cases. They also took into account the pros and cons of the appeals likely to be filed in the apex court next week, sources added. It may be recalled that the cases were registered against Nawaz Sharif after PML-N government was overthrown by former president Gen Pervez Musharraf in a coup in October 1999. A special anti-terrorism court convicted Nawaz on charges of hijacking and terrorism and passed a sentence of life imprisonment. The ousted premier was charged with endangering the lives of Gen Musharraf and nearly 200 other passengers on a commercial flight. The National Accountability Bureau had also registered another helicopter tax evading case in which he was disqualified to hold any public office for 21 years. Meanwhile, French Ambassador Daniel Jouanneau called on Nawaz Sharif in Raiwind on Monday. During the meeting Nawaz Sharif said Pakistan was victim of terrorism and he wanted to create national harmony for the integrity of the country. He lashed out at the policies of former US president Bush, saying due to the ill-conceived strategy by Bush, terrorism took its toll. French envoy said strong and stable Pakistan was a guarantee of peace in the region and the world. He called the continuity of democratic process as promising sign.