Steps to flashback the primary and stanby database to a point in time.

Disable dataguard configuration

dgmgrl
show configuration – check no errors before starting this
disable FAST_START FAILOVER;
DISABLE CONFIGURATION;
Primary

srvctl stop database -d PTEST1
srvctl start database -d PTEST1 -o mount
SQL>flashback database to timestamp to_timestamp(‘2011-02-17 14:00:00’, ‘YYYY-MM-DD HH24:MI:SS’) or restore point
SQL>alter database open resetlogs;
SQL>select resetlogs_change# from v$database;
srvctl start service -s TEST -d PTEST1

Standby

srvctl stop database -d FTEST1
srvctl start database -d FTEST1 -o mount
flashback database to scn <above-2>
Enable dataguard configuration

dgmgrl
ENABLE CONFIGURATION;
ENABLE FAST_START FAILOVER;

show configuration – check no errors