1、Lessons Learned Entry: 0046Lesson Info:a71 Lesson Number: 0046a71 Lesson Date: 1991-12-13a71 Submitting Organization: KSCa71 Submitted by: David PenningtonSubject: Assembly and Adjustment of Crane Components; Crane Load Charts; Calculating Crane Loads; Reporting Equipment Problems Across Contractor
2、Interfaces Description of Driving Event: A 65-ton mobile crane was hoisting a 40,000 pound test weight from payload canister #2 to a flatbed truck. The test weight was 8 to 10 feet above the canister doors when the boom of the crane slipped, falling toward the canister and lifting the front wheels o
3、ff the ground. The test weight contacted the inside of the canister door and slid inside the canister, damaging the side of the canister. One employee sprained his right foot as a result of the mishap when he quickly jumped from the canister door to avoid being hit by the crane boom.Lesson(s) Learne
4、d: 1. Improper assembly and adjustment of boom hoist brake releasing mechanism may allow the boom and load to lower rapidly and uncontrollably.2. Using improper load charts when determining the load radius will create a hazardous situation that may cause the crane to tip over.3. Neglecting to add th
5、e weight of heavy rigging and the weight of the crane load block will result in a miscalculated load.4. A crane with a history of problems, including “boom running“, caused a mishap because the past problems were not properly reported.Recommendation(s): 1. Develop a checklist documenting the proper
6、assembly and adjustment of all crane Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-components as specified by the manufacturer and verified by safety.2. To prevent improper load chart usage, physically mount or attach the proper load charts in the
7、cranes cab.3. Place warning placards in the crane and special instructions in the loadchart requiring all rigging weights to be included in load calculations.4. Develop a positive, enforceable system for reporting equipment problems across contractor interfaces.Evidence of Recurrence Control Effecti
8、veness: N/ADocuments Related to Lesson: N/AMission Directorate(s): a71 Space Operationsa71 Exploration SystemsAdditional Key Phrase(s): a71 Facilitiesa71 Flight Equipmenta71 Ground Operationsa71 Ground Equipmenta71 Hardwarea71 Lifting Devicesa71 Payloadsa71 Test ArticleAdditional Info: Provided by I
9、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-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-,-,-
