MIL-DTL-87173 Propellant, Priming Fluid, Alcm Engine, Grade Pf-1This specification covers one grade of high-density hydrocarbon fuel. This specification was thoroughly reviewed as a part of acquisition reform. While most of the requirements were converted to performance terms, due to the military-unique nature of the product \(see 6.1\) and the need for compatibility with deployed systems it was determined that not all requirements could be converted. The issuance of this specification as "detail" is not intended to constrain technology advances in future systems.

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MIL-DTL-87173B(USAF)

APPENDIX B

B.3.6.3.2 Abnormally-colored deposits (for example, blue or gray) shall be rated code A (A for abnormal

color).

B.3.6.3.3 When the overall tube rating is reported, record the rating of the maximum deposit that

matches the Color Standards plus P or A if the tube contains deposits which do not match the Color

Standards. If the tube contains only P or A deposits, report only the appropriate letter(s); do not try to

assign a numerical rating to a P or A deposit. Examples of how the rating procedure is to be used are

given below:

EXAMPLE 1: The darkest deposits on the heater tube match color standard 3. Also present are

peacock colors. Thus, the overall tube rating to be reported is 3P.

EXAMPLE 2: The heater tube has maximum deposits which fall between Color Standards 2 and 3

and has no peacock or abnormal colors. The total tube rating is 2.

EXAMPLE 3: The heater tube matches Color Standard 1 except for an abnormal deposit that does

not match the ASTM Color Standards. The overall tube rating to be reported is 1A.