MIL-PRF-49166/2A(CR)
2.3 Order of precedence. In the event of a conflict between the text of this document and
the references cited herein, the text of this document takes precedence. Nothing in this
document, however, supersedes applicable laws and regulations unless a specific exemption has
been obtained.
3. REQUIREMENTS
3.1 First article. Where specified in the contract (see 6.2), the contractor shall furnish first
article units for inspection (see 4.2).
3.2 Materials. The contractor shall select the materials that are fully capable of meeting
all of the operational and environmental requirements specified herein. Selection criteria of the
class, grade or type part shall be that the material will be able to perform its intended function
when it is assembled. Verification of the supplier meeting the overall performance requirements
shall be the governing acceptance standard.
3.3 Description. The MX-9872(V)2/UA Scanner, herein known as the MX-9872(V)
2/UA, shall consist of the MIL-PRF-49166, MX-9872(V)/UA Scanner with a phase-shift lens
and counter weight assembled and adjusted to 30 Hz operation.
3.4 Construction. The MX-9872(V)2/UA shall be constructed in accordance with
drawing SM-D-807690-2 (Mechanical Scanner Assembly) and shall meet the form, fit, function,
and interface requirements of this specification.
3.4.1 Weight. Weight of the MX-9872(V)2/UA shall be 1.55 pounds maximum as
weighed with a scale having an accuracy of 1% or better.
3.4.2 Dimensions. The dimensions and dimensional tolerances of the MX-9872(V)2/UA
shall be in accordance with Drawings SM-D-807690-2 (Mechanical Scanner Assembly), SM-D-
657713 (Cover, Scan Housing) , and SM-D-657620 (Housing, Scanner) to ensure items built
IAW this specification physically interface with the existing hardware.
3.4.3 Components.
a. Mechanical Scanner MX-9872(V)/UA
b. Phase-shift lens assembly
c. Counterweight
3.5 Performance characteristics. The characteristics specified herein shall apply as defined
in 3.1 through 3.5 except that the particular tests required in MIL-PRF-49166 , including 4.5.8
(modular transfer function), 4.6.4 (shock), and 4.6.5 (vibration) apply with the phase shift lens,
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