1、Lessons Learned Entry: 0446Lesson Info:a71 Lesson Number: 0446a71 Lesson Date: 1995-06-12a71 Submitting Organization: LERCa71 Submitted by: Judy TerlepSubject: Postlanding Power-Up of Spacelab Description of Driving Event: The first United States Microgravity Laboratory (USML-1) located in the Space
2、lab of the shuttle (STS-50) was not continuously monitored due to insufficient notification of the latest flight procedures. The contingency flight procedures allow for Spacelab power-up in the event of system low temperature and power-down when the orbiter proceeds to ground cooling. Due to an anom
3、aly with the orbiter ammonia boiler system, the flight procedures were altered the day before landing with the decision to power-up Spacelab. The flight procedures were altered again on the landing day with the decision to leave Spacelab powered after the orbiter proceeded to ground cooling. The Spa
4、celab was left in this condition when the orbiter was turned over to KSC. Since KSC-Payloads Group was not informed of the condition, they did not monitor Spacelabs activation nor the several hours of power-on operation.Lesson(s) Learned: Insufficient notification of the latest flight procedure chan
5、ges to the KSC-Payloads Group can lead to inaccurate tracking of Spacelabs configuration following landings.Recommendation(s): Ensure that monitoring, emergency procedures, and personnel are available for all landings regardless of the planned landing configuration for Spacelab.Evidence of Recurrenc
6、e Control Effectiveness: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): N/AAdditional Key Phrase(s): a71 Flight Equipmenta71 Flight Operationsa71 Ground Operationsa71 HardwareAdditional Info: Approval Info: a71 Approval Date: 1996-09-13a71 Approval Name: Sell Jamesa71 Approval Organization: 501-4a71 Approval Phone Number: 216-433-8618Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
