What was found
DURING BETA TUBE INSTALLATION FOUND PROP WOULD FEATHER. WOULD NOT UNFEATHER. DISCONNECTED P30 FROM NR 1 PCU & CHECKED CONTINUITY OF UNFEATHER VALVE COIL (J30 PINS A TO B) FOUND 58.6 OHMS. REMOVED BETA TUBE REF AMM 61-20-01-000-801 BETA TUBE O RINGS INSP OK. BEGAN REMOVAL OF NR 1 ENG PCU IAW AMM 61-20-11-000-801 STEPS 1 THRU 4A (3) COMPLETED REMOVAL OF PCU REF TASK 61-20-11-000-801 INSTALLED NEW NR 1 PCU IAW MM TASK 61-20-11-400-801 PAR 1-4A (16) AND PAR 5A B C. PROP NOW FEATHERS AND UNFEATHERS OK WITH PUMP.