As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STANDBY INSTRUMENT IS FLICKERING CONSTANTLY AFTER TAKEOFF. RETURNED TO THE FIELD. LANDING UNEVENTFUL. R & R IAW AMM TASKS 34-12-16-000-801 & 34-12-16-400-801. OPS TEST OF ISI IAW AMM TASK 34-12-16-710-801, PITOT/ STATIC SYS. LEAK CHECK IAW AIR TASK CARD: 6341102. OPS & LEAK CHECKED GOOD, NO FURTHER DEFECTS NOTED. RETURNED TO SERVICE.