Dr Ahmad Samsuri, who is also a trained aerospace engineer, said investigators need to look at every possible angle to search for the plane that is believed to have disappeared in the southern Indian Ocean.
"We need to consider every viewpoint and other aspects including technical, external and safety factors in order to conduct a more in-depth investigation.
"Even the conspiracy theories need to be investigated to see whether there is any basis to them," said Dr Ahmad Samsuri.
He told reporters after an Iftar event at Universiti Malaysia Terengganu that questions surrounding the Beijing-bound flight remain unanswered and did not discount the notion that it could be lying on the seabed.
Dr Ahmad Samsuri, who is also PAS election director and Ru Rendang assemblyman, once headed Universiti Putra Malaysia's Aerospace Department and had often been sought for his views on the aviation mystery.
Malaysia said last week that the search by Texas-based company Ocean Infinity would end Tuesday (May 29) after two extensions of the original 90-day time limit.
Malaysia signed a "no cure, no fee" deal with Ocean Infinity in January to resume the hunt for the plane, a year after the official search in the southern Indian Ocean by Australia, Malaysia and China was called off. No other search
On May 23, Transport Minister Anthony Loke said the Government would release a full report on the investigation into MH370's disappearance after the offshore search was completed, but had not yet determined a date for the report's release.
MH370 vanished on its way from Kuala Lumpur to Beijing on March 8, 2014, with 239 people onboard.
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