As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB ABOVE FL180 ALL LT ENGINE INSTRUMENT INDICATORS BEGAN TO FLUCTUATE EPR FLUCTUATING BETWEEN 1.65 AND 1.5 EPR FOR APPROXIMATELY THREE MINUTES 94335. INSTALLED MISSING PROBE HEAD PER MM 77-11-04-8. PERFORMED ENGINE HIGH POWER TAKEOFF. ALL PARAMETERS NORMAL. (M)