 In addition, the CAIB identified eight missed opportunities to determine the extent of the damage, all of which either got no response from mission management or resulted in no action being taken.The first of these was an inquiry on the fourth day of the mission by the chief engineer of Thermal Protection Systems as to whether the crew had been asked to inspect the damage; no answer was received from lower levels of management.The opinion of the managers that the debris strike was only a maintenance-level concern was established early in the mission, making it increasingly difficult for concerned engineers to be heard by those with decision-making authority.