MIL---DTL---51194D(EA)
co n tra cto r sh a ll o bta in writte n a p p ro va l fro m th e co n tra ctin g a ctivity p rio r to p ro ce e d in g with
re gu la r p ro d u ctio n .
TABLE I. First article requirement verification matrix
Requirement
Verification
Characteristic
Paragraph
Paragraph
Materials, components, and assembly
3.1
4.4.1
Airflow resistance
3.2
4.4.2
Filtration efficiency
3.3
4.4.3
Rough handling
3.4
4.4.4
Air leakage
3.5
4.4.5
Workmanship
3.6
4.4.6
4.3 Conformance ins pection.
4.3.1 Lotting. A lo t sh a ll co n sist o f th e filte rs p ro d u ce d by o n e ma n u fa ctu re r, a t o n e p la n t,
fro m th e sa me ma te ria ls, u n d e r e sse n tia lly th e sa me ma n u fa ctu rin g co n d itio n s, a n d o ffe re d fo r
a cce p ta n ce a t o n e time ; h o we ve r, n o mo re th a n o n e lo t o f filte r ma te ria l sh a ll be re p re se n te d
in a n y o n e lo t o f fin ish e d filte rs. E a ch lo t sh a ll be id e n tifie d by a n a lp h a n u me ric lo t n u mbe r.
T h e lo t n u mbe r sh a ll in clu d e a ma n u fa ctu re r's id e n tifica tio n symbo l co n sistin g o f 3 a lp h a ch a r-
a cte rs, a n u me ric co d e id e n tifyin g th e ye a r o f p ro d u ctio n , a co d e o r a bbre via tio n th a t sign ifie s
th e mo n th o f p ro d u ctio n , a n d a n in te rfix---se ria l n u mbe r. T h e in te rfix---se ria l n u mbe r sh a ll
ch a n ge if th e re is a ch a n ge in th e d e sign , ma n u fa ctu rin g p ro ce ss, ma te ria ls, su p p lie rs, p ro d u c-
tio n ru n , o r if a n e w co n tra ct is u se d .
4.3.2 Sampling. Sa mp lin g sh a ll be co n d u cte d in a cco rd a n ce with th e cla ssifica tio n o f ch a r-
a cte ristics in 4.3.5 a n d , wh e n sp e cifie d , ta ble I. Sa mp le s sh a ll be se le cte d a t ra n d o m.
4
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