United States 78V137000
GRUMMAN FLXIBLE CORP.
The problem
THE PARKING BRAKE DRUM, IF SUBJECTED TO ABNORMAL HEATING AS A RESULT OF OPERATING THE COACH WITH THE PARKING BRAKE APPLIED OR ONLY PARTIALLY RELEASED, MAY BECOME CRACKED. THE WEAKENED BRAKE DRUM THEN BECOMES SUBJECT TO FAILURE.
What owners should do
THE BRAKE DRUM WILL BE INSPECTED AND, IF NECESSARY, WILL BE REPLACED WITH AN IMPROVED BRAKE DRUM.
Units 1179