MIL‐DTL‐3241F
TABLE III. Group C inspection.
Inspection
Requirement paragraph
Test method paragraph
Group C-1
Drop test
3.7
4.8
Group C-2
Vibration
3.6
4.7
Moisture resistance
3.8
4.11
Steel reel heads
3.2
4.10
Weld inspection
3.3.4
4.9
4.3.2.3 Noncompliance. The contractor shall immediately report, in writing, each group C failure
occurrence, including details of the failure and characteristics affected. The contractor shall immediately
investigate the cause of failure and further report the results of investigation and details of the proposed
corrective action on (i) the process and materials, as applicable, and (ii) all units of product which were
manufactured under the same conditions and which the government considered subject to the same
failure. Reports shall be forwarded to the responsible technical activity designated in the contract through
the quality assurance representative. After corrective action has been taken, additional sample units shall
be subjected to group C inspection (all inspections, or the inspection which the sample failed, at the
option of the government and group A inspection may be reinstituted; however, final acceptance and
shipment will be withheld until the group C reinspection results have shown that the corrective action was
effective (see 6.3).
4.3.2.4 Reinspection of conforming group C sample units. Unless otherwise specified, sample units
which have been subjected to and passed group C inspection may be accepted on contract, provided that
they are resubjected to and pass group A inspection after repair of all visible damage.
4.4 Workmanship. The reels shall be given a thorough visual and mechanical inspection to ascertain
that the material, construction, and welding are in accordance with applicable requirements (see 3.12).
4.5 Test for fit on axle. Reels DR-5( ), DR-7( ), RC-453( )/G and RL-159( )/U shall be tested with an
axle 1-1/32 inch +0 -1/64 by 1-1/32 inch +0 -1/64 to insure compliance with 3.4. Reel DR-8( ) shall be
tested with an axle 11/32 inch +0 -1/64 by the 11/32 inch +0 -1/64 to insure compliance w1th 3.4.
4.6 Alignment tests.
4.6.1 Reel head. The requirements of 3.5 shall be met for reels DR-5( ), DR-7( ), RC-453( )/G and RL-
159( )/U when axle, 1-1/32 inch +0 -1/64 by 1-1/32 inch +0 -1/64 is inserted through the center of reels.
The same shall apply for reel DR-8( ) except that the axle size shall be 11/32 inch +0 -1/64 by 11/32 inch
+0 -1/64.
4.6.2 Plate alignment on reel RC-453( )/G. The requirements of 3.5.1 shall be met using the drum as a
reference.
4.7 Vibration test. The reels shall be subjected to the test of 4.7.1 through 4.7.4. During vibration the
unlit shall be clamped in its normal operating position on a vibration table that can be controlled to within
10 percent of specified frequencies and amplitudes.
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