The self-funded MH370 investigator has handed over the pieces of the debris to ATSB for investigations.
Fatima Pardi says their 'relation' had 'cooled' off in the weeks leading to the disappearance of the flight.
A second sweep could mean the ongoing search would continue beyond December.
Authorities are planning the next phase of search by using drift modelling if the current hunt turns up nothing.
MH370 search programme director Peter Foley said the designated search area was finalised based on 'hard facts'.
Scientists estimate that over 60% of Earth's oceans remain unexplored.
Transport minister Liow Tiong Lai says there is no evidence to show that pilot deliberately crashed the plane.
Aircraft parts believed to belong to the plane have been discovered since 2015.
Senior air crash expert Larry Vance said the flaperon was not broken off, but eroded while entering ocean.
ATSB chief commissioner Greg Hood confirmed that the wing part was definitely from a Boeing 777.
MH370 relatives in Beijing demand to meet people involved in the decision to suspend the search
The possibility Captain Shah may have planned a suicide flight was raised in an FBI investigation.
More washed-up debris may also be found in Mozambique, Madagascar or Tanzania.
Sakinab Shah spoke out after FBI documents were published suggesting Zaharie Ahmed may have crashed the plane
Pilot Byron Bailey had first mentioned about the information recovered from the flight simulator in January.
Home-built flight simulator used by pilot Zaharie Ahmad Shah apparently showed him practise a suicide route to the Indian Ocean.
However, the hunt will resume if new evidence is found.
Fugro project director Paul Kennedy says Boeing 777 could have glided further than previously thought.
Personal items and parts of the plane that resemble the plane seat of Malaysian Airlines, were found by a US lawyer.
Australia, China and Malaysia's Transport Ministers to meet on 18-19 July.
2-day talks ended without indication of search plans or concrete date for ministerial meeting.
Malaysia, Australia and China to discuss next steps as 2-year search for plane reaches final stage.