TM 1–1520–238–T–3
Change 5
30–5
30–14 SIGNAL NAME:
FAILURE CODE
MEMORY LOCATION: 003041
MEMORY DATA BIT(S):
5–11
(ASCII)
CONDITION:
Refer to table 30–1 for ASCII code conversions.
SIGNAL FUNCTION:
Indicates DNS failure codes after test.
REMARKS: From SDCC to FCC.
PASS:
Blank=undefined malfunction. Go to paragraph 30–15.
FAIL: Location of fault:
T=TAS failure. Go to chapter 2, Air Data System Multiplex Read Codes.
H=Heading failure. Go to chapter 27, Embedded GPS–Inertial Multiplex Read Codes.
P=Pitch and/or roll failure. Go to chapter 27, Embedded GPS–Inertial Multiplex Read Codes.
M=MDS failure. Go to chapter 29, CDU Multiplex Read Codes.
S=SDCC failure. Replace SDCC (TM 11–1520–238–23–1).
R=RTA failure. Replace RTA (TM 11–1520–238–23–1).
30–15 SIGNAL NAME:
FAILURE CODE
MEMORY LOCATION: 003042
MEMORY DATA BIT(S):
13–19
(ASCII)
CONDITION:
Refer to table 30–1 for ASCII code conversions.
SIGNAL FUNCTION:
Indicates DNS failure codes after test.
REMARKS: From SDCC to FCC.
PASS:
Blank=undefined malfunction. Replace SDCC (TM 11–1520–238–23–1).
FAIL: Location of fault:
P=Pitch/roll failure.
T=TAS failure.
M=MDS failure.
A=Aux output failure.
Replace SDCC (TM 11–1520–238–23–1).
30–16 SIGNAL NAME:
MESSAGE ERROR
MEMORY LOCATION: 003054
MEMORY DATA BIT(S):
9
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
indicates message error.
REMARKS: From FCC to SDCC.
PASS:
If fourth digit displayed on CDU is 0, 1, 4, or 5, go to paragraph 30–17.
FAIL: Location of fault: input correct datum (TM 1–1520–238–10). If fault remains, replace FCC
(TM 9–1230–476–20–2).
30–17 SIGNAL NAME:
RESERVED
MEMORY LOCATION: 003054
MEMORY DATA BIT(S):
12–14
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates serial digital error.
REMARKS: From FCC to SDCC.
PASS:
If second digit displayed on CDU is 0, 1, 2, or 3 and third digit is 0 or 4, go to paragraph
30–18.
FAIL: Location of fault: replace FCC (TM 9–1230–476–20–2).
