may be failed vs may failed

Some examples from the web:

• It may well be deemed a failed state.
• One possible reason why the referendum in the Republic of Cyprus failed may be that the voters felt themselves rushed and that too little time was allowed for explanations; that being so, it was monopolised by nationalist slogans.
• If we consider the Barcelona process, Meda, Meda II and the Valencia Conference, and the past and present expectations raised by these developments, it may be that we have failed somewhat in implementing all the decisions taken.
• And in a de-pressurized environment, the lack of oxygen could be failed.
• 2. Except as specified in subparagraph (d)(5), no vehicle will be failed unless it has been preconditioned according to the following requirements.
• The procedure used to check soil stability makes it likely that the tests will be failed; accordingly, the dwellings will inevitably have to be moved.
• Except as specified in point (d)(5), no vehicle will be failed unless it has been preconditioned according to the following requirements:
• Vehicles shall only be failed if the arithmetic means of at least the last three free acceleration cycles are in excess of the limit value.
• The port state controls had failed and the IMO itself had failed.
• Login failed, TLS negotiation failed.
• Failed husband, failed father, failed career.
• I failed my wife, I failed my little girl, and I failed myself.
• The floodgates failed, the canal walls failed, the pumps failed.
• All attempts to boost voltage have failed.
• - Pairs well with failed suicide.
• And she failed to impress the authorities.
• Ikea tested us, we failed.
• Marcus Redman, you failed this city.
• There's no way that equipment failed.
• The boy's heart has failed.

Some examples from the web:

• May 20, 2020 ... db2start may failed with sql1042c or sql1641n · Diagnosing The Problem. 1) Check the db2diag.log, here is the error info. 2020-03-29-08.31.
• “sendmail function may failed” error. Resolved ramnathk. (@ramnathk). 2 years, 6 months ago. Hi there, I get this notice printed on top of every screen in ...
• Jan 6, 2022 ... At the stage of vSAN disk format pre-checking, LCM may failed at different nodes whey query the info via host vSAN API.