What was found
ENGINE UNABLE TO MAINTAIN MANIFOLD PRESSURE IN THE CLIMB. ON GROUND RUNS THE MECHANIC REPORTED THAT THE LT TURBOCHARGER AUDIBLY HAD A DIFFERENT PITCH THAN BEFORE. REMOVAL OF THE INDUCTION SYS REVEALED THAT THE LT TURBOCHARGER COMPRESSOR WHEEL RETAINING NUT WAS MISSING AND THE COMPRESSOR BLADES WERE BADLY DAMAGED. THE RETENTION NUT WAS LATER FOUND ATTACHED TO THE ALTERNATE INDUCTION AIR-BOX DOOR MAGNET. IT WAS FURTHER FOUND THAT THE NUT WOULD ROTATE FREELY BY HAND WHEN THREADED BACK ONTO THE COMPRESSOR SHAFT, INDICATION LACK OF OR LOSS OF ANY LOCKING FEATURE.