R MOS 31-AUG-2000 - Is) 51 737-SL-32-090 USE 737 STEERING LOCKOUT PINS.. SERVICE LETTER MOS I 7-APR-2000 - (s) 51 737-SL-32-090 REV. A USE 737 STEERING LOCKOUT PINS.. SERVICE LETTER MOS 31 -JUL-2000 - (s) 51 737-SL-32-091 NOSE GEAR FLEXIBLE CONDUIT P/N 287A6212-21 DAMAGED. SERVICE LETTER MOS I2-MAY-2000