MIL-DTL-55041F
APPENDIX A
GROUP FIRST ARTICLE APPROVAL
A.1 SCOPE
A.1.1 Scope. This appendix provides manufacturers a grouping that can be used to obtain first article approval for
a number of items by obtaining first article approval for one item in a group. The grouping shall be in accordance with
the following table. Manufacturers may obtain first article approval at a lower frequency range than listed in the table.
This will satisfy first article approval for switches with the stated characteristics in a group from this frequency range
down to the lowest frequency range specified.
A.1.2 Group first article approval. Group first article approval of switches having requirements for interlock circuit,
rotor motion delay, transient interference, RF energy leakage, pressure, explosion or Salt atmosphere is not
permitted unless these tests are performed on the first article approved switch.
TABLE A-I. Grouping for first article approval.
Group
Characteristics of first article
Characteristics of switches
number
approved switch
first article approved
1
Rectangular waveguide
Rectangular waveguide
Choke face
Choke or cover face
Fail-safe
Fail-safe or latching
With indicator
With or without indicator
Frequency range 1.7-2.6 GHz
Frequency ranges 1.7-2.6 GHz to .32-.49 GHz
Screened
Screened or nonscreened
DC or AC energizing voltage
DC or AC energizing voltage or manual
1P2T
1P1T or 1P2T
2
Rectangular waveguide
Rectangular waveguide
Choke face
Choke or cover face
Fail-safe
Fail-safe or latching
With indicator
With or without indicator
Frequency range 1.7-2.6 GHz
Frequency ranges 1.7-2.6 GHz to .32-.49 GHz
Nonscreened
Nonscreened
DC or AC energizing voltage
DC or AC energizing voltage or manual
1P2T
1P1T or 1P2T
3
Rectangular waveguide
Rectangular waveguide
Cover face
Cover face
Fail-safe
Fail-safe or latching
With indicator
With or without indicator
Frequency range 1.7-2.6 GHz
Frequency ranges 1.7-2.6 GHz to .32-.49 GHz
Screened
Screened or nonscreened
DC or AC energizing voltage
DC or AC energizing voltage or manual
1P2T
1P1T or 1P2T
4
Rectangular waveguide
Rectangular waveguide
Cover face
Cover face
Fail-safe
Fail-safe or latching
With indicator
With or without indicator
Frequency range 1.7-2.6 GHz
Frequency ranges 1.7-2.6 GHz to .32-.49 GHz
Nonscreened
Nonscreened
DC or AC energizing voltage
DC or AC energizing voltage or manual
1P2T
1P1T or 1P2T
22
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