What was found
AFTER NR 1 ENGINE START, AMBER XX APPEAR ENG 1 PSI, WAS CONSULTED AND C/B 121 NV N-40 WAS RESET PSI APPEARS AND INDICATION WAS BETWEEN 16-18 PSI AN ADVISORY APPEARS ON THE RATING TAKE OFF CONSEQUENTLY REPLACED T/O WAS DONE AT 75K APROX PSO DROPS TO 12, ENGINE WAS SHUT DOWN WHEN RETURNING TO GATE. IN ACCORDANCE WITH AMM 73-33-15-00-041 AND AMM 78-33-15-400-041 THE XMTR-OIL PRESS (4003EN) WAS REMOVED AND REPLACED. FOLLOWING TSM 79-33-00-810- 814-A THE XMTR-OIL PRESS (4003EN) WIRING WAS CHECKED, ACCORDING TO ASM 79-36-01 SCH 01 P0024, SHEETS 1 AND 2 NO FAULTS WERE FOUND IN THE WIRING. GOOD IN ACCORDANCE WITH AMM 31-55-34-400-001 A THE SDAC2 WAS REMOVED AND REPLACED SATISFACTORY TEST IAW AMM 71-00-00-710- 006 B MINIMUM IDLE CHECK AND HIGH POWER-ENGINE RUN UP WAS PERFORMED OIL PRESS IS SATISFACTORY.