1、Lessons Learned Entry: 0193Lesson Info:a71 Lesson Number: 0193a71 Lesson Date: 1994-01-20a71 Submitting Organization: LERCa71 Submitted by: S. PapellSubject: Damage to Wind Tunnel Components Description of Driving Event: The mishap occurred in the air drive section of a research wind tunnel. During
2、an evening research run, a six foot stepladder was drawn into the wooden drive blades of the tunnel. The stepladder was destroyed and the wooden blades were damage.The investigating committee determined that the principal cause of the mishap was the unsecured stepladder left in the tunnel by day shi
3、ft personnel who used it for inspection purposes. Factors that contributed to the mishap were: the distraction of tunnel operator/mechanic by other duties, inadequate checklist elements that would require verification that the tunnel is clear for operation, and no requirement for a pre-run tunnel wa
4、lk through just prior to a test run.Lesson(s) Learned: Unsecured equipment left in a wind tunnel during a test run can cause damage to wind tunnel components.Recommendation(s): Modify the test operations checklist to require a pre-run tunnel walk through to verify compliance with all safety consider
5、ations and pre-operation procedures.Evidence of Recurrence Control Effectiveness: Recommendations made by the review board have been approved by the director and procedures to prevent this mishap from re-occurring have been instituted.Provided by IHSNot for ResaleNo reproduction or networking permit
6、ted without license from IHS-,-,-Documents Related to Lesson: N/AMission Directorate(s): a71 Exploration Systemsa71 Aeronautics ResearchAdditional Key Phrase(s): N/AAdditional Info: Approval Info: a71 Approval Date: 1994-04-19a71 Approval Name: Evan E. Blancoa71 Approval Organization: LERC/501-4a71 Approval Phone Number: 216-433-8717Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
