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|  MIL-S-22518A(AS)
Weight. The total weight of the ATS/AD, including
3.7
lubricant, shall not exceed the value specified on the Specification
Sheet.
3.8
Installation.
Size and dimensions. The size of the ATS/AD shall
3.8.1
be within the envelope configuration as specified on the Specification
Sheet. The ATS/AD installation configuration shall be as shown thereon
and shall be subject to approval by the Navy. Manufacturers interested
in qualifying an ATS/AD to this specification are urged to coordinate
the installation with the Navy prior to fabrication of a qualification
ATS/AD. The manufacturer's Navy-approved installation drawing will form
a part of this specification.
-
3.8.2
Mounting. Mounting of the ATS/AD shall not require
special tools for installation, nor shall there be any loose or separable
parts when the unit is removed from the engine. The ATS/AD shall be
designed to mount on the specified engine accessory drive within the
specified tolerances, without requiring any measuring or adjustment to
the accessory drive or to the ATS/AD prior to installation.
3.8.2.1
Engine accessory drive. The ATS/AD shall provide
two pads, pad "A" and pad "B." The ATS/AD shall be mounted on the
aircraft engine at pad "A" and shall be suitable for mating with the
engine accessory drive specified on the Specification Sheet. Pads "A"
and "B" shall be in compliance with the Specification Sheet.
Trial installation and engine cranking. The ATS/AD
3.8.2.2
shall be compatible with regard to form, fit and function when installed
on the applicable aircraft and aircraft engine (see 4.5.19 and 4.5.20).
Air inlet and exhaust connections. The ATS/AD air
3.8.3
inlet connections and the ATS/AD exhaust shall be as described on the
Specification Sheet.
Mechanical loads and moments. The ATS/AD air inlet
3.8.3.1
and exhaust flanges shall be capable of withstanding the following loads
and moments resulting from thermal expansion, deflection, and vibration
when installed in aircraft:
50 lbs.
a.
Shear
-
b.
Axial
- 100 lbs.
c.
Moment
- 300 lbs-in.
3.8.3.2
Air inlet pressure loads. The ATS/AD air inlet
flange shall be capable of withstanding the tensile load resulting from
the maximum air pressure specified on the Specification Sheet.
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