A.

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MIL-PRF-38135C(USAF)

4.6.20 Humidity. The indicator shall be subjected to the class B humidity test in RTCA/DO-160.

The indicator shall then be subjected to the individual tests.

4.6.21 Acceleration. The indicator shall be subjected to an acceleration of 20g for a period of 30

seconds in each of three mutually perpendicular directions. The indicator shall then be subjected

to the individual tests.

4.6.22 Sand and dust. The indicator shall be tested according to the sand and dust test in

RTCA/DO-160. The indicator shall then be subjected to the individual tests.

4.6.23 Pointer zero position error. No differential pressure shall be applied to the indicator. The

pointer shall be within 10 knots of the zero graduation.

4.6.24 Reflection reducing coating. The reflection reducing coating requirement shall be verified

according to the appropriate test method in MIL-C-14806.

5. PACKAGING

5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the

contract or order (see 6.2). When actual packaging of materiel is to be performed by DoD

personnel, these personnel need to contact the responsible packaging activity to ascertain requisite

packaging requirements. Packaging requirements are maintained by the Inventory Control Point

packaging activity within the Military Department or Defense Agency, or within the Military

Department's System Command. Packaging data retrieval is available from the managing Military

Department or Defense Agency automated packaging files, CD-ROM products, or by contacting

the responsible packaging activity.

6. NOTES

(This section contains information of a general or explanatory nature which may be helpful, but is

not mandatory.)

6.1 Intended use. The AVU-19A indicator covered by this specification is intended for use in

aircraft as a standby instrument to indicate the speed relative to the air at sea level and the

equivalent sea level speed corresponding to the actual sustaining force of the air at any other

altitude.

6.2 Acquisition requirements. Acquisition documents must specify the following:

a. Title, number, and date of this specification.

b Issue of DoDISS to be cited in the solicitation, and if required, the specific issue of

individual documents referenced (see 2.1).

c. If first article inspection is required (see 3.1 and 4.2).

d. Lighting intensity and color requirements (see 3.5.16).

e. If the test conditions are to be different than specified (see 4.4).