1、Lessons Learned Entry: 0503Lesson Info:a71 Lesson Number: 0503a71 Lesson Date: 1994-07-08a71 Submitting Organization: LARCa71 Submitted by: Bernard LewisSubject: Periodic Evaluation of Blade Sets Description of Driving Event: N/ALesson(s) Learned: Periodic and thorough evaluation, to include NDE, is
2、 in order for blade sets that have been in use for extended periods of time.Recommendation(s): As a result of a blade failure incident, an aggressive blade inspection program, to include NDE, was implemented. During normal tunnel shutdown, a certain percentage of blades were pulled and thoroughly ex
3、amined. Over a set period of time, this program insured inspection of all blades. New blades were equipped with frangible tips. There have been no subsequent catastrophic blade failures.Evidence of Recurrence Control Effectiveness: N/ADocuments Related to Lesson: N/AMission Directorate(s): Provided
4、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-N/AAdditional Key Phrase(s): a71 Parts Materials & Processesa71 Safety & Mission Assurancea71 Test FacilityAdditional Info: Approval Info: a71 Approval Date: 1997-04-02a71 Approval Name: Elijah C. Kenta71 Approval Organization: 421a71 Approval Phone Number: 757-864-3345Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
