What was found
FOR INFORMATION ABOUT POSSIBLE ICE ACCUMULATION IN TAILBOOM. DURING COMPLIANCE OF SB900-023, REMOVED THRUSTER ASSY FROM THE TAILBOOM AND FOUND A SECTION OF ICE IN TAILBOOM AT THRUSTER ASSY BREAKLINE APPROXIMATELY TWO FEET LONG, 8 INCHES WIDE ANDAPPROXIMATELY 1/2 - 3/4" THICK. CHECKED DRAIN HOLE IN TAILBOOM IN THAT AREA AND FOUND TO BE CLEAR. APPROXIMATELY TIME OF DAY AT FINDINGS 9:30 AM. NIGHT BEFORE TEMPERATURE WAS IN LOW 20S. INFORMATION ONLY TO MCDONNELL DOUGLAS.