TROUBLESHOOTING INDEX - TM-55-1925-292-14-P0123

TM 55-1925-292-14&P

0007 00

OPERATOR AND UNIT MAINTENANCE

FIREFIGHTING, FIRE ALARM, AND FIRE SUPPRESSION SYSTEMS FOR

INLAND AND COASTAL LARGE TUG (LT)

TROUBLESHOOTING INDEX

USE OF THE INDEX

Troubleshooting begins by identifying the equipment and the malfunction. Table 1 contains the operator trouble-

shooting procedures, and table 2 contains the unit troubleshooting procedures. The equipment list is contained

in the left column of the tables, and the malfunctions are listed in the center column of the tables. Once the

correct equipment and malfunction are located, look immediately to the right for the work package and procedure

that correspond to the malfunction. After locating the appropriate work package and procedure, turn to that

procedure, and follow the instructions in the paragraph that follows.

USE OF TROUBLESHOOTING PROCEDURES

Functional flow logic tree troubleshooting procedures are used for all troubleshooting procedures in this manual.

In this troubleshooting style, a pill shaped symbol (figure 1) is used to depict the beginning or end point of a

procedure. Decision points are depicted by diamond shaped symbols (figure 2). Action points, as well as warn-

ings, cautions, and notes are contained in rectangular symbols (figure 3). Procedures that are too large for one

page are joined together by the circular shaped connector symbols (figure 4). The connector symbol will denote

which page and step to go to (or come from) on another page. Finally, when flowchart lines cross, the technician

must ensure that the correct path is followed. Crossing lines (figure 5) indicate that the points connect. Lines that

cross with a jump symbol in the center (figure 6) indicate that the points do not connect. The technician must

correctly follow the arrows to complete the troubleshooting procedure.

Look for the pill shaped beginning symbol in the upper left corner of the procedure. This symbol should contain

the identified malfunction or symptom. Starting from this point, follow the arrowed lines through the procedure.

Remember that the diamond shaped symbols denote a decision step. At each of these points you will be required

to make a decision and to follow the appropriate line for that decision. Continue to follow the arrowed lines

through the procedure until the malfunction or symptom is corrected.

Figure 1. Pill Shaped Symbol

Figure 2. Diamond Shaped Symbol

0007 00-1