1、Lessons Learned Entry: 0067Lesson Info:a71 Lesson Number: 0067a71 Lesson Date: 1992-03-26a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Retractable Platform Hinge Mounts Secured With Pop Rivets Description of Driving Event: A thermal protection system (TPS) technician had
2、 an access platform retracted and secured to gain access to the top side of OV-102 left wing. Upon completion of his work, he attempted to extend the platform back to its normal (closed) position. When the platform was approx. Six to eight inches from being in place, the rivets on the hinge failed c
3、ausing the platform to fall on the orbiter. All hinge platform mounts need to be secured by welds or bolts and lock washers. The present practice of securing the hinge mounts with pop rivets is not adequate to support these platforms.Lesson(s) Learned: Soft metal (aluminum) rivets used to secure ste
4、el hinges to heavy platforms failed, resulting in flight hardware damage.Recommendation(s): Replace all hinge platform mounts with steel bolts, lock washers, and nuts on all similar platforms.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AProvided by IHSNot for Resa
5、leNo reproduction or networking permitted without license from IHS-,-,-Mission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Facilitiesa71 Flight Equipmenta71 Ground Operationsa71 Ground Equipmenta71 HardwareAdditional 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-,-,-
