The Shutdown Severity Levels (SSL) of each FCN, are defined as
 follows:
 1 = Enter SHUTDOWN state and transmit diagnostic messages.

 2 = Enter SHUTDOWN state (unless operating in flight and TSO mode)
 and transmit diagnostic messages.

 3 = Enter SHUTDOWN state if redundant source not available, unless
 operating in flight and in TSO mode. Transmit diagnostic messages.

 4 = Continue with operation, transmit diagnostic messages.

 X = Not applicable.
 The following Table 1 is a list of all Fault Code Numbers (FCN) with
 their associated:;

 -Fault Symptoms;

 -LRU IDs (MCDU Message);

 -Fault Class ;

 -Shutdown Messages;

 -Severity Levels.
 Table 2 is a list of all LRU Ids with their associated MCDU Message.

 Table 1
 C = POWER-UP
 D = WATCH
 E = START PREPARATION
 F = STARTING
 G = RUN
 H = COOLDOWN
 I = SHUTDOWN
 J = SELF TEST

 For LRU ID definition refer to Table 2
 -------------------------------------------------------------------------------FCN | FAULT SYMPTOM | LRU ID |FAULT| MESSAGE | SSL
 | | |CLASS| | C D E F G H I J -----+---------------------+--------+-----+-------------------+----------------0  | LCD STATIC PRESS. | 13 |  1  | ---| 4 4 4 4 4 4 4 4
 | SENSOR FAIL LOW | | | | -----+---------------------+--------+-----+-------------------+----------------1  | LCD STATIC PRESS. | 13 |  1  | ---| 4 4 4 4 4 4 4 4 | SENSOR FAIL HIGH | | | |
 -----+---------------------+--------+-----+-------------------+----------------2  | LOW PMG VOLTAGE | 53 |  1  | ---| X X X 4 4 4 4 X -----+---------------------+--------+-----+-------------------+----------------3  | LCD DELTA P SENSOR  | 13 |  1  | ---| 4 4 4 4 4 4 4 4
 | FAIL HIGH | | | | -----+---------------------+--------+-----+-------------------+----------------4  | INLET PRESS. SENSOR | 29 |  1  | ---| 4 4 4 4 4 4 4 4 | LOW | | | | -----+---------------------+--------+-----+-------------------+----------------5  | INLET PRESS. SENSOR | 29 |  1  | ---| 4 4 4 4 4 4 4 4 | HIGH | | | | -----+---------------------+--------+-----+-------------------+----------------6  | INLET PRESS. SENSOR | 29 |  1  | ---| 4 4 4 4 4 4 4 4 | RATE | | | | -----+---------------------+--------+-----+-------------------+----------------7 | N O T U S E D | -| | ---| -----+---------------------+--------+-----+-------------------+----------------8  | INLET TEMPERATURE | 29 |  1  | ---| 4 4 4 4 4 4 4 4 | RTD OPEN | | | | -----+---------------------+--------+-----+-------------------+----------------9  | INLET TEMPERATURE | 29 |  1  | ---| 4 4 4 4 4 4 4 4 | RTD SHORTED | | | | -----+---------------------+--------+-----+-------------------+----------------10  | GEN. OIL TEMP. | 25 |  3  | ---| 3 3 3 3 3 3 3 3 | SENSOR OPEN | | | |

 -------------------------------------------------------------------------------
FCN | FAULT SYMPTOM | LRU ID |FAULT| MESSAGE | SSL
 | | |CLASS| | C D E F G H I J -----+---------------------+--------+-----+-------------------+---------------------+---------------------+--------+-----+-------------------+----------------
11  | GEN. OIL TEMP. | 25 |  3  | ---| 3 3 3 3 3 3 3 3 | SENSOR SHORTED | | | | -----+---------------------+--------+-----+-------------------+----------------12  | GBX TEMP SENSOR | 38 |  3  | ---| 3 3 3 3 3 3 3 3 | OPEN | | | | -----+---------------------+--------+-----+-------------------+----------------13  | GBX TEMP SENSOR | 38 |  3  | ---| 3 3 3 3 3 3 3 3 | SHORTED | | | | -----+---------------------+--------+-----+-------------------+----------------14  | COLD JUNCTION RTD | 14 |  3  | ---| 4 4 4 4 4 4 4 4 | OPEN | | | | -----+---------------------+--------+-----+-------------------+----------------15  | COLD JUNCTION RTD | 14 |  3  | ---| 4 4 4 4 4 4 4 4 | SHORTED | | | | -----+---------------------+--------+-----+-------------------+----------------16  | GBX DE-OILING VALVE | 12 |  3  | ---| 4 4 4 4 4 4 4 4 | SHORTED | | | | -----+---------------------+--------+-----+-------------------+----------------
17  | MAIN START | 59 |  1  | ---| X X X 4 X X X X | CONTACTOR OUTPUT | | | | | SHORT CIRCUIT | | | |
 -----+---------------------+--------+-----+-------------------+----------------
18  | B/U START CONTACTOR | 10 |  1  | ---| X X X 4 X X X X | OUTPUT SHORT | | | | | CIRCUIT | | | |
 -----+---------------------+--------+-----+-------------------+----------------19  | START IN PROGRESS | 45 |  3  | ---| X X X 4 X X X X | OUTPUT SHORTED | | | | -----+---------------------+--------+-----+-------------------+----------------20  | APU AVAILABLE OUTPUT| 3 |  3  | ---| X X X X 4 4 X X | SHORTED | | | | -----+---------------------+--------+-----+-------------------+----------------21  | MAIN FUEL VALVE | 21 |  1  | ---| 4 X 4 4 4 4 X4 | SHORTED | | | | -----+---------------------+--------+-----+-------------------+----------------22  | BLEED VALVE OPEN | 6 |  2  | ---| X X X X 4 X X X | OUTPUT SHORTED | | | |
　
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