Transcript of Hearing 12/12/97 - TWA Flight 800 Investigation

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13151it.2Also rwhen we functionally test the system3problems,for instance during an -- after an engine45change, we will check the –– what’s the right word? ––functionality and integrity of the engine feed system.67MR. SWAIM:the engine pylons?Would that include the O–rings in8WITNESS THOMAS:Yes.9MR. SWAIM:Okay, but those O-rings in the1011engine pylons are outside of the fuel tank?WITNESS THOMAS: Yes, and –– yeah, and as we12discussed yesterday afternoon,an O–ring leaking in the13pylon will become very obvious very quickly.14MR. SWAIM:Because that fuel will go where?15WITNESS THOMAS:It will drain -- it will1617181920drain down the pylon through a drain line to the bottomof the cell and overboard.MR. SWAIM: Okay. Is the opinion of yourselfor the Boeing Company that leakage within the fueltanks is acceptable in those types of cases?21WITNESS THOMAS:Minor leakage inside the22fuel tank that doesn’t cause major pilot concern or a23tank to tank transfer is acceptable.Obviously, the24pilots themselves have that discretionary option of25saying,“I really don’t like what is happening; it isCAPITAL HILL REPORTING, INC.(202) 466-9500
1316123causing me to do too many corrective re–balances of theairplane.”As we described yesterday, a fuel leak in the4cell –– or,rather in the strut itself, would be noted567by the maintenance people and appropriate action taken.MR. SWAIM: Okay. We know that in some casesfuel hoses and other rubberized components have a set8life for the rubber,especially for the package life in9101112that -- I am thinking of other airplanes, especiallyflexible braided fuel lines -- but, in the case of atransport airplane such as this, what is the life thatyou expect out of an O-ring, or the whole series of O-1314rings?Is there a set life?CHAIRMAN HALL: Mr. Swaim, I don’t want to1516cut you off.MR. SWAIM:Okay.171819CHAIRMAN HALL: But, I really -- the onlyquestion I wanted to know is that you are aware of itand are you looking at it.20MR. SWAIM:Very good.21WITNESS THOMAS:The short answer is yes, and22yes.2324leak,CHAIRMAN HALL: Okay. You know, a leak is aand I assume even though it is acceptable for a25short period of time under some situations, it wouldn’tCAPITAL HILL REPORTING, INC.(202) 466-9500
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1186BEFORE THENATIONAL TRANSPORTATI
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119112“The reticulate polyurethan
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1193123The Air Force developed this
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1195123QBY MR. ANDERSON:DIRECT EXAM
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1197123decision, and the decision w
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1directions.When the test in the Mo
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1CHAIRMAN HALL:1201I know that goes
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12031234What we will -- are expecti
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12051and then we will charter ARAC,
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120712CHAIRMAN HALL:MR. ANDERSON:Ge
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1WITNESS McSWEENEY:1209I would then
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12111234567several Airworthiness Di
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1213123There are many who have stud
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12151opinion.2WITNESS McSWEENEY:I w
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12171States.There are international
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121912from industry what kind of ti
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1AYou can be a member of the active
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12231reasons,like airline dispatch
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12251 MR. ANDERSON: I would like to
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1looking at inerting,1227looking at
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123will participate.WITNESS THOMAS:
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12CHAIRMAN HALL:specific informatio
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1233123of order here.WITNESS THOMAS
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1235123becomes an option that becom
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1so,in that regard it is very impor
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12electric pumps, or moving the --
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1WITNESS McSWEENEY:1241Well, whethe
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12431234require engineering and som
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124512345MR. SWAIM: Mr. McSweeney,
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124712eliminating.so, the key is, i
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12491will be at the ARAC.2so,we hav
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125112This remains an important con
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1unstable foam wandering around the
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1255123451, again, am very pleased
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12571234reduction must be in the ta
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12591aircraft or a fleet, but money
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12611234concept, and I was also ver
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126312345FURTHER DIRECT EXAMINATION
Page 80 and 81: 1265123passed to an engineering soc
Page 82 and 83: 12671cancellations do not affect yo
Page 84: 12691The next thing, Mr. McSweeney,
Page 87 and 88: 127212effort and what is referred t
Page 89 and 90: 127412history that is most signific
Page 91 and 92: 127612said and written about the pr
Page 93 and 94: 1system was the right system to use
Page 95 and 96: 12801combat and heard the maintenan
Page 97 and 98: 12821MR. BALL:It is significantly c
Page 99 and 100: 128412345buying the C-130 J. It is
Page 101 and 102: 12861234567aircraft that have been
Page 103 and 104: 12881MR. STREETER:In the list you s
Page 105 and 106: 1290123obviously as the tank emptie
Page 107 and 108: 129212We discussed a little bit on
Page 109 and 110: 129412345and create the service bul
Page 111 and 112: 12961CHAIRMAN HALL: Well, thank you
Page 113 and 114: 1WITNESS TYSON:I am going to try to
Page 115 and 116: 13001234remediational technology in
Page 117 and 118: 130212and the FAA, they are working
Page 119 and 120: 130412middle of the summer and it i
Page 121 and 122: 13061MR. BOUSHIE:Crane has no quest
Page 123 and 124: 1308123is in order to respond to th
Page 125 and 126: 13101DR. ELLINGSTAD:Has any of that
Page 127 and 128: 1Jet-A from LAX,1312and we have don
Page 129: 13141Mr. Thomas, is there anything
Page 133 and 134: 1effect,1318it is almost to the poi
Page 135 and 136: 1320123CHAIRMAN HALL: So, in other
Page 137 and 138: 1322123looking at the oxidizer and
Page 139 and 140: 13241234tell them over and over aga
Page 141 and 142: 132612quickly as we can as we run u
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Page 145 and 146: 13301opinion.We have thoroughly enj
Page 147 and 148: 13321234this opportunity to thank t
Page 149 and 150: 13341meeting, we can never be sure
Page 151 and 152: 1336123456received within the speci
Page 153: 1338123again thank C-Span for that
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Transcript of Hearing 12/12/97 - TWA Flight 800 Investigation

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