Apollo 204 Review Board Appendix D - NASA's History Office

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;l ;i (.,n G"I co I B. Metallutgic::! _,mi:,ation of C;',s C],,_m,,atograph Cable Harness Descril:I {:,:_ (1) Samples of tt7 ' 'Zwi_e from a thermally u,_:_ '-,._lcd- J ZOI|_ ]I_ tratlS_.'t_! _':_' :!': : !oii:?ii- ,,2) As per item ] .".: ,;,_ :._am- I tMiual pled;n mode. thermal]y:;' .::t:d zone. (3) GC Connec:o' GAS CHROMATOGRAPH CABLE EXAMINATION Condi tion (1) l:i::c' :;_.:in structure and twinning. A fildte uniform niL., 7, i,( ;'_,:" was observed. (2) (:,,p1>c_ b;ead hollowed,rot. Extensive loss of copper h, :;? :, ,.ted copper wire. Dendritic and :.;r(,ss grain stru,,,_-,:" v:ith no twinniqg. Path of mvhing [rom_wi;e to st ;_;,:, to a_.:aa clearly de'fined. Sh; ,_ grain struc "" ,'1, l c I. t< {t .. zones. turai >,,,, :: _:,,tween rut:uttered and (" " _ b_'at Tllt_l>,ii_:!, ,:i_([ cavitation effects ev{dcnt, i,i:tle ahoy- ing (_i :_i. !._'! sheatk ard coppec (only localized at ni(k_ i dc ::":_.:0. Copper integrity helots' nickel sheath eviil, :,t :::_,ws .controlled melting pheuome.n,:m. Nickel pla_.;' ,,a_ iu a quench comlition abow. tunnvl. X-r_'y, rc .i-_..'ance, and conh:ctivity n:easmements were ncg:_ticc :_nd showed no aaomaiies. No evide.nce of arci,:'; v,'::._ [ound on dielectric material. © © _naly:_ is (I) Wire in nc_:T_a,.y ,I, anqe;ded condition. No alk,ying o['dckc! coating. ! (2) }tighly c( ace:itr:_tcd ;m,1 localized flame &,graded I'_:fio:_ pnd raised tem- peratu_c to some vah:e le_s Iha_ the meltin:: !)(_i_._;of coppvr l)clwccn l;,c)0°(L and lf_,0()'_.-;. I)e.w ad:,licm c,f i,:sul;_lioh aliow::d Mmriing of ! !7 V AC wires which provided furtt:(:.r heat i_:pt:t driv_nx the local lc,,,pe_ature abr)v:" tI:,_ mcltihg I-,:int of copper, l".xclusive ('×teti::,:} oi in'err, al heati_!_, (arcing) (.am_,: a(:(:(r:_! for i!,t. metalic::;ical c,mdi t;r;:: of 'virc but v.':.).s a result of combin,.d _:(fvcts, o,x: pre,:eding the other, as evi,l,'nccd by ca,,itatiov effects, sharp grain sU,_ct_rai zoning, a_:rl unalIc, ving'of coppe_ .... ' " ' ' Shorting of conncc;or pins ,ii.'l not occur. t 1: l I 11 ! 1 i i i.
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Apollo 204 Review Board Appendix D - NASA's History Office

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