REG NASA-LLIS-0029-1992 Lessons Learned - Installation Removal of Access Platforms at Mate Demate Device (MDD).pdf

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1、Lessons Learned Entry: 0029Lesson Info:a71 Lesson Number: 0029a71 Lesson Date: 1992-09-11a71 Submitting Organization: KSCa71 Submitted by: Lisa L.MusgraveSubject: Installation/Removal of Access Platforms at Mate/Demate Device (MDD) Description of Driving Event: After the shuttle carrier aircraft/orb

2、iter reaches its park position within the mate/demate device, the side access platforms, which parallel the major part of the orbiter fuselage, are lowered into service position to demate the orbiter. Flip down platforms are extended from the side access platforms to allow personnel to reach the 50-

3、1/50-2 doors. ropes are used to lower the platforms to the orbiter and technicians have minimal control of the speed at which the platforms are lowered. A potential exists for a loss of platform control and subsequent orbiter damage/personnel injury.Lesson(s) Learned: Loss of access platform control

4、 while raising/lowering from service position may cause platform to fall on orbiter, resulting in major damage.Recommendation(s): Provide winch and cable arrangement for safely extending/retracting platforms from mate/demate device side access platforms.Evidence of Recurrence Control Effectiveness:

5、N/AProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Aircrafta71 Facilitiesa71 Flight Equipmenta71 Ground Operationsa71 Gro

6、und Equipmenta71 Hardwarea71 Launch VehicleAdditional Info: Approval Info: a71 Approval Date: 1994-06-01a71 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-,-,-