 |
|||
|
|
|||
| ||||||||||
|
|  MIL-C-45978 A(AR)
.
APPENDIX B
c.
Failure detected and/or corrected during final technical
inspection.
Failures resulting from lack of Clarity of instruction or
d.
other fault in the maintenance test package.
The following are two typical failure
50.1.2 Failure modes
modes for use in assesment of mission reliability failures.
These failure modes are subject to performance degradation (see
50.1.3).
1.
Breechblock
closed
or
opened.
cannot
be
2.
Gun will not fire.
50.1.3 Degrade d modes of operation. A certain amount of
performance degradation must take place before a reliability
failure can be assumed. Of course, if the system ceases to
function, performance becomes unacceptable (i.e., non-existent) ;
however, if performance is only degraded, then some threshold
must be established to define where reliability failures begin.
q
Allowable degradation thresholds have been established for the
various performance parameters. Performance beyond these
thresholds constitutes a reliability failure. As long as
performance remains above the threshold or is returned above the
threshold within a five minute maintenance period, no reliability
failure is charged. The allowable degradation thresholds are:
15 RPM (Rounds Per Minute)
1. Rate of Fire - maximum
3-5 RPM (Rounds Per Minute)
2. Rate of Fire - sustained
ailure scoring Pr ocedure. The following scheme provides
50.2
the instructions for the use of the Failure Definition (see
60.1.3) for assessing reliability requirements of the Cannon,
105MM Howitzer; M205 (see 50.1). These instructions assume that
an incident or malfunction has occurred during test, and a record
has been prepared against this action to the extent where it is
necessary to determine the chargeability of the action.
Incidents where the identification of a reliability failure is in
doubt will be deferred to a user/developer/tester Scoring
Conference. The step-by-step instructions for using the Failure
Definition are as follows:
Step 1. Record the incident information (i.e. rounds on test
item and system, description of incident, nature of maintenance
action required, maintenance time in hours, maintenance
manhours, etc.) when a malfunction of the cannon occurs or is
25
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals