PS Magazine - TB 43-PS-654
PS, The Preventative Maintenance Monthly
ISSUE 654
MAY 2007
7
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&OR THAT REASON, G\N SYSTEM MAINTAINERS ARE NOW REr\IRED TO INSPECT THE -5?5
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S ]REECH
SEMIANN\ALLY IN ADDITION TO THE RO\ND CO\NT INSPECTIONSU 4HE INCREASED FREr\ENCY WILL GIVE
INSPECTORS A CHANCE TO uND ANY SIGNS OF CRACKING ]EFORE IT RES\LTS IN AN ACCIDENT D\E TO
]REECH FAIL\REU
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LL uND THE INSPECTION PROCED\RES IN WORK PACKAGE >>@1 >> OF 4- <.1>>@.5>>.56
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; ARE PRETTY SPECIuC ON WHEN TO INSPECT THE ]REECH
ON YO\R "RADLEY
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S -5?5 G\NU =NLY ONE PRO]LEMUUU
IT'S NOT ENOUGH!
4HE STANDARD ]REECH, /3/ 1>>@.>1.11?.>>8>, IS INSPECTED AFTER REACHING 15,@>> RO\NDS
AND THEN EVERY 5,@>> RO\NDS AFTERWARDU 4HE ENHANCED ]REECH, /3/ 1>>@.>1.?@?.>6<8,
IS INSPECTED AFTER 5@,>>> RO\NDS AND EVERY @,>>> RO\NDS AFTERWARDU /O INSPECTIONS ARE
REr\IRED ]EFORE REACHING THESE RO\ND CO\NTSU
!T ONE \NIT, A 5@MM RO\ND EsPLODED IN A STANDARD ]REECH THAT HAD ]ROKEN INTO TWO
PIECES D\RING uRINGU :\CKILY, THERE WERE NO INq\RIES, ]\T THE -5?5 WAS A COMPLETE LOSSU
4ESTING REVEALED THAT A STRESS CRACK HAD DEVELOPED IN THE ]REECH AND ]ECAME LARGER OVER
TIMEU !ND ]ECA\SE THERE WERE NO uRING RECORDS AVAILA]LE FROM ]EFORE THE \NIT RECEIVED THE
"RADLEY, THERE WAS NO WAY TO TELL q\ST HOW MANY RO\NDS THE G\N HAD uREDU
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