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Updated LER 50-237/76-019:on 760327,loose restrainer bolt keepers found on 19 of 20 jet pumps.Probably caused by fatigue cracking induced by vibration.Keeper secured by placing two tack welds 180 degrees apart.W/770504 ltr.

Accession Number: ML20090E353

Date Released: Monday, April 13, 2020

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• ML20090E349 - Updated LER 50-237/76-019:on 760327,loose restrainer bolt keepers found on 19 of 20 jet pumps.Probably caused by fatigue cracking induced by vibration.Keeper secured by placing two tack welds 180 degrees apart.W/770504 ltr. (3 page(s), 5/4/1977)
• ML20090E354 - LER 50-237/76-019:on 760327,loose retainer clamp bolt keepers found on 19 of 20 jet pumps.Keeper tack weld failures caused by vibrational fatigue cracking.Keepers rewelded to original specs.W/760426 ltr. (3 page(s), 4/26/1976)
• ML20090E356 - Updated LER 50-237/76-019:on 760327,loose restrainer clamp bolt keepers found on 19 of 20 jet pumps.Tack weld failures caused fatigue cracking due to vibration.Two tack welds placed on each keeper.W/770311 ltr. (3 page(s), 3/11/1977)