The phrase "alleged failed" is not correct in written English.
It seems to be a combination of "alleged" and "failed," but it lacks proper grammatical structure.
Example: "The alleged failed attempt to launch the rocket raised concerns among the engineers."
Alternatives: "supposedly unsuccessful" or "purportedly failed."
Tygart is still pushing the UCI to hand over documents relating to an alleged failed test during the 2001 Tour of Switzerland.
Now most members of Machar's group have been arrested – with the exception of Machar himself and Taban Deng, the former governor of Unity state – for their link to the alleged failed coup d'etat.
The district, they alleged, failed to accommodate her religious practice.
Found to have lung cancer more than two years ago, McLaren sued a physician who he alleged failed to discover his condition when he went for a physical examination in 1989.
The doctor and flight attendants administered CPR after using an onboard defibrillator, which the family alleges failed to work.
Among the charges, it is alleged he failed to report to a monitoring company, failed to report to Ipswich police station, met a person without agreement of the Home Office, and used an unauthorised mobile phone.
It is alleged police failed to investigate the earlier attack properly and missed the chance to take it off the streets.
The S.E.C. lawsuit, filed in a Chicago federal court, alleged Chase failed to properly reconcile the amount of bonds outstanding and the amount owed to each bondholder.
The lawsuit, filed in federal court in Ohio in 2003, alleged Riddell failed to warn players and coaches that wearing its helmets and shoulder pads in hot temperatures could be dangerous.
A former Burbank police officer who was fired five years ago after city officials alleged he failed to report an assault against a detainee during the investigation of the 2007 Porto's Bakery robbery is suing the city for wrongful termination.
The application alleges Southern Cross Austereo failed to maintain a safe workplace".
