'indicates an attempt' is correct and usable in written English.
You can use it to show that something is evidence of a plan or effort to do something. For example, "The amount of research conducted indicates an attempt to uncover new information."
But that may actually be a positive development, since each recall indicates an attempt to fix some sort of safety defect.
After the confrontation, Mr. Mineo was let go with a summons, which prosecutors have said indicates an attempt to hide the abuse.
The cockpit voice recorder of the crashed EgyptAir flight MS804 indicates an attempt to put out a fire on board the jet before it plunged into the Mediterranean, sources on the investigation committee have said.
NDT3 costumes are generally striking -- watch for the dancing jellyfish -- but some viewers may sense that using such outre garb indicates an attempt to bolster a performance the dancers can't quite give.
She urged Timorese to reject independence in the UN-run referendum that led to East Timor's freedom, so her presence indicates an attempt to heal the relationship between the two countries.
The use of a redundant vocative indicates an attempt by the writer to establish a closer relationship with the reader (Eggins and Slade 1997: 145).
"Ten bakery attacks is not random – they show no care for civilians and strongly indicate an attempt to target them".
Her pelvis was clothed in a plastic packet, fashioned into a pair of panties indicating an attempt to protect her modesty".
Still, the fact that it happened at all seemed to indicate an attempt at repairing relations after the Turkish bombing campaign, and subsequent military raid.
Recent actions by the the institute, Dr. Postol wrote, "may indicate an attempt to conceal evidence of criminal violations of federally funded research at the M.I.T. Lincoln Laboratory".
Taken together under highly controlled interview conditions and interpreted by an expert, the results of such measurements may indicate an attempt to deceive.
