1、Lessons Learned Entry: 1107Lesson Info:a71 Lesson Number: 1107a71 Lesson Date: 1999-02-01a71 Submitting Organization: HQa71 Submitted by: David M. LengyelSubject: International Space Station Program/Crew Return Vehicle (CRV)/Accelerated Development Description of Driving Event: Initial Operational C
2、apability of Crew Return Vehicle (CRV)Lesson(s) Learned: The current ISS requirement is for a single Crew Return Vehicle (CRV). Crew safety over the life of the ISS requires the availability on orbit of two CRVs, both of which is capable of accommodating the entire crew. The Soyuz capsule, designate
3、d as the interim CRV, does not have a full crew capability. Also, it is uncertain that sufficient Soyuz capsules and their launches will be available to supply the needs of the ISS.Recommendation(s): NASA should accelerate its program to develop and deploy two full-crew CRVs and take whatever measur
4、es are necessary now to ensure the availability of sufficient Soyuz capsules and launchers until the CRVs are ready.Evidence of Recurrence Control Effectiveness: The item remains open and under assessment. The ISS Program has assessed the need and feasibility for a second CRV on-orbit aboard the Spa
5、ce Station. A Tiger Team, led by the Astronaut Office, was chartered to assess the overall effectiveness. The Tiger Team presented its findings to the Lead Center Director and the Associate Administrator for Space Flight, who requested that additional analysis be performed in alternative configurati
6、ons.NASA is engaged in on-going discussions with the Russian Space Agency regarding the acquisition Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-of additional Soyuz vehicles. Due to the current Russian economic problems, NASA closely monitors the
7、status of the Soyuz production required to support the ISS at the manufacturer, Energia. NASA is engaged in on-going discussions of the procurement of additional goods and services from RSA. The procurement will provide the cash flow necessary to sustain the production levels of Soyuz vehicles that
8、the ISS requires until the CRV is available. These discussions will continue in the overall context of determining Russias ability to satisfy its commitment as an international partner.Documents Related to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key P
9、hrase(s): a71 Aerospace Safety Advisory Panela71 Flight Operationsa71 Policy & Planninga71 SpacecraftAdditional Info: Approval Info: a71 Approval Date: 2002-02-12a71 Approval Name: Bill Loewya71 Approval Organization: HQa71 Approval Phone Number: 202-358-0528Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
