REG NASA-LLIS-0110-1992 Lessons Learned - Vacuum Read-out Stations for the MLP-s LH2 system.pdf

1、Lessons Learned Entry: 0110Lesson Info:a71 Lesson Number: 0110a71 Lesson Date: 1992-08-28a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Vacuum Read-out Stations for the MLPs LH2 system Description of Driving Event: The LH2 system maintenance includes a monthly vacuum read

2、ing in the annulus space in the overhead vacuum-jacketed (VJ) high point bleed and LH2 fill lines. Access to the read-out ports in the GH2 fill line on side 1 of the MLPS is precarious. There are not adequate tie-off points for body harness and lanyards. The readout ports are 10-12 feet above the fl

3、oor grating. If a technician uses a ladder for access, or climbs on existing structures to make the reading, he/she is within inches of exterior handrails and above them. This places him/her about 40 feet above the vab floor or the pad surface.Lesson(s) Learned: Inadequate access to the vacuum read-

4、out stations on the MLP LH2 systems vacuum jacketed lines could lead to personnel injury.Recommendation(s): Relocate the vacuum read-out stations to an area and height convenient and safe for technicians to easily access.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: P

5、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Facilitiesa71 Ground Operationsa71 Hardwarea71 Safety & Mission AssuranceAdditional Info: Approval Info: a71 Approval Date: 1994-06-02a71 Approval Name: James G. Klinea71 Approval Organization: KSC/HEIa71 Approval Phone Number: 407-867-7614Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-