What was found
HYD 1 FAIL, LEVEL 2 ALERT RT AFTER T/O, IND 23L. REF TO QRH. RAISED GEAR, SLATS CLIMBED TO 230. DECLARED EMERGENCY. PLANNED FOR FLAPS 35/EXT LAND. ALERT CAME ON AFTER GEAR RAISED, PRIOR TO FLAP RETRACTION. REPLACED NR 1 HYD RESEVOIR QTY INDICATION ARM, BOLT, AND NUT REF SMP AND MM 29-12-01-4-0 AND 29-32-02-2. OPS CHECKED SYS AND PERFORMED HSC RTS AND SYS PRESSURE TEST, ALL TESTS PASSED.