MIL-DTL-81928C(AS)
MIL-DTL-81927. The introduction shall explain the rationale for use of this manual. The
relationship of this document to other manuals in the organizational set shall be included.
c. Content. The manual shall display all data necessary to assist maintenance personnel in
the recognition and interpretation of system and subsystem fault indications. The data
shall identify specific faults, related conditions, and any pertinent information that would
direct the user to a specific maintenance action for fault connection. The following
guidelines shall apply to preparation of the fault reporting manual.
(1) Content shall be based on faults which can be observed by ground and flight personnel
during normal ground operations or an in-flight condition.
(2) Faults shall be identified by codes which will assist maintenance personnel in
recognition, interpretation and diagnosis of detected system discrepancies.
(3) To conform to the WP system and task orientation, fault codes shall be grouped
numerically to respond to fault indications within a given system or related integrated
systems.
(4) System and subsystems faults shall be tabulated numerically within a given WP. Fault
and action information shall be tabularly presented adjacent to the fault code. A
concise translation shall be prepared in standard language to indicate fault
interpretation. Specific references shall be made to fault correction.
(5) Fault symptoms or trouble indications shall also be charted with a corresponding fault
isolation indicator which refers to the appropriate maintenance manual and task.
(6) To aid comprehension, explanatory illustrations and locator drawings shall be included
where required.
3.3.2.3.9.4 Fault isolation manual. The fault isolation manual is a companion manual to the
fault reporting manual. The two manuals are designed for consolidated use in rapid isolation of
system defects revealed in flight or during operational ground operations. Requirements for this
manual shall include but not be limited to the following:
a. Format. When authorized, the manual may be prepared in the 5 1/2 x 7-inch page
format. Foldouts shall not be incorporated unless specifically authorized by the requiring
activity.
b. Introduction. The introduction shall conform to the requirements of the
MIL-DTL-81927. The introduction shall explain the rationale for use of this manual.
Relationship of this document to other manuals in the organizational set shall be
included.
c. Content. The manual shall display supporting fault analysis procedures that assist
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