Cracks in its structure were spotted in March and the area was sealed off.
The IFA has confirmed to the BBC that it received a preliminary engineer's report into the damage and is studying the findings.
The venue is scheduled to host the Euro 2016 qualifier against Romania on 13 June.
Kevin McShane of the Institute of Civil Engineers told BBC Radio Ulster's Good Morning Ulster programme that it was a surprise "nothing more serious" had happened because the foundations had moved.
"We can see at the base of the columns that the wall and the beams have moved," he said.
"That's caused stress throughout the structure, given the shape of the structure it's very top heavy, it's leaning on one side towards the pitch.
"So if there's some problems with the foundation, the natural reaction of the whole structure is to try to topple over onto the pitch."
On Wednesday, the IFA's chief executive Patrick Nelson said staging the international at Windsor Park remained its "only focus".
He said an alternative venue for the qualifier, such as the Kingspan Stadium, had not yet been considered.
It is believed that at least two independent reports are being carried out on the damaged stand, with cracks first spotted on 31 March, two days after Northern Ireland's Euro 2016 qualifier against Finland.
Linfield are unable to use their home venue and the Irish Cup final on 2 May, which was scheduled to be played at Windsor Park, has been switched to the Oval.

Above a link to an article about the fund hitting £1m, Dominic Peacock wrote "I've just donated", before making an offensive comment.
The East Riding of Yorkshire councillor later deleted it and said: "I shouldn't have put it on in the first place."
Council leader Stephen Parnaby said he would not tolerate such remarks.
Labour MP Mrs Cox died when she was shot and stabbed in Birstall, West Yorkshire, on Thursday.  A fund set up in her memory has received more than £1m in donations.
Mr Parnaby said: "Following inappropriate and offensive comments made on social media relating to the sad and tragic death of Jo Cox MP, I have suspended councillor Dominic Peacock from the East Riding of Yorkshire Council Conservative Group with immediate effect.
"I shall be reporting this to a meeting of the full group and my recommendation will be that he be expelled.
"This is not the time for inappropriate remarks, however intended, and I will not tolerate them in my group, and residents should expect their elected representatives to act in an appropriate and compassionate way."
He said he would be asking the Conservative group to make a donation to the memorial fund.
Mr Peacock posted the comment in the Vote Leave Beverley & Holderness, Haltemprice & Howden page on Facebook.
A spokesperson for the Vote Leave campaign also condemned the remark, saying: "These comments are appalling, abhorrent and we believe that he should be thrown out of the Conservative Party.
"He is not welcome to campaign with us."
Mr Peacock, who is the councillor for Minster and Woodmansey Ward, "apologised unreservedly" but declined to comment further when approached by the BBC.
His comments have also sparked a series of angry responses on social media.
Chevan Ilangaratne wrote on Facebook : "What an utterly odious and inappropriate comment to make following what was an absolute tragedy for mankind last week."
Jonathan Ware described the comment as "absolutely ghastly", while Tony Green called it "an absolute disgrace".
The Irish Football Association (IFA) has been advised to demolish the damaged west stand at Windsor Park, the BBC understands.
[NEXT_CONCEPT]
A Conservative councillor has been suspended over an offensive Facebook post he wrote mocking fundraising in memory of killed MP Jo Cox.