Master Sampling Table - SB-740-97-39000010

Master Sampling Table

SB 740-97-3920

not contribute to lot rejection of the Major-A defect

(a) Single sampling plan. A single sample plan,

class. When a rejection number is reached in a

corresponding to the appropriate lot size and defect

second stage sample, inspection will be discontinued.

classification, is used involving lots of 25 items

(3) Inspection method. Perform technical in-

or less. A separate sample size and pair of acceptance

spection of the selected samples. Functional or per-

and rejection numbers is shown under the column

formance tests should be avoided unless there are

headed Major-A and Major-B. The numbers under

significant indications that components of the items

the column headed AC refer to the maximum allow-

have deteriorated to a degree that operational prob-

able number of defective item(s) in the sample that

lems will exist.

are permissible for acceptance. Conversely, the num-

c. Defect Classification. Refer to Appendix B and

bers under the columns headed RE refer to the mini-

C for listings of defects and their classifications.

mum number of defective item(s) in the sample re-

Defects should be classified as critical (when critical

quired to cause rejection of the lot.

defects are considered), Major-A, Major-B or Minor,

(b) Double sampling plan. A double sampling

even if they are not considered to belong fully in

plan, corresponding to the appropriate lot size is used

these classes at the time of the inspection, but can

if a successive stage cumulative acceptance and re-

reasonably be expected to be in these classes prior to

jection numbers are indicated. The same sample

the next scheduled inspection period. When inspec-

size is used to determine the acceptance for both

tion or testing of an item reveals a critical defect,

Major-A and Major-B defectives. The interpretation

the lot represented will be rejected. Defects noted

of the columns headed by AC and RE is the same as

that described for the single sampling plan in (a)

during the inspection and classified as minor will

above. If at the first sampling stage, the number

not be cause for rejection of the lot.

of defective items found is between the two numbers

12. Other Instructions. a. Rejected Lots. Units com-

prising rejected lots will be afforded technical in-

indicated in the column headed by AC and RE, an

additional sample must be selected to arrive at an

spection on an individual basis to identify the degree

accept or reject decision for only one particular

of serviceability, condition and completeness in

defect class. If an additional sample is required for

terms of readiness for issue or to identify actions

only one particular defect class, the inspection of

ange the status of the material (AR

the second sample will be restricted to only

ticular defect class. For exam

table indicates accep

class, but requires an

accept or reject decision

13.

A defectives so o

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