TM 1–1520–238–T–3
11–6
Change 4
11–14 SIGNAL NAME:
PYLN 2 POS (ACY) P2 POSITION (ACZ)
MEMORY LOCATION: 001722
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
Monitor HOD while using the PYLON ACTG SW; memory location response should
increase when up (flight stow) is selected and decrease, then go negative when down
(ground stow) is selected.
SIGNAL FUNCTION:
Indicates pylon 2 position.
REMARKS: From PAC 2 through LH inboard (INBD) MRTU Type II to FCC. Pylon 2 elevation
positioning data.
PASS:
If CONDITION has been met, go to paragraph 11–15.
FAIL: Location of fault: external stores elevation controller, wiring from external stores controller to
pylon actuator controller 2, pylon actuator controller 2, wiring from pylon actuator controller 2 to
LH OUTBD MRTU Type II, LH OUTBD MRTU Type II. Troubleshoot wiring to isolate fault
(TM 1–1520–238–T–8).
11–15 SIGNAL NAME:
PAC 2 STAT
MEMORY LOCATION: 001721
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
(None)
SIGNAL FUNCTION:
Generates PYLN ACTUATOR CONTROLLER NO GO LT INBD FD/LS
message.
REMARKS: From PAC 2 through LH INBD MRTU Type II to FCC.
PASS:
If the sixth digit on HOD is 0, go to paragraph 11–16.
FAIL: Location of fault: pylon actuator controller 2, wiring from pylon actuator controller 2 to LH INBD
MRTU Type II, LH INBD MRTU Type II. Troubleshoot wiring to isolate fault
(TM 9–1090–208–23–2).
11–16 SIGNAL NAME:
PYLN 2 STAT (ACY) P1 COM STAT (ACZ)
MEMORY LOCATION: 001434
MEMORY DATA BIT(S):
18
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Generates PYLON NO GO FD/LS Message.
REMARKS: From FCC to RHE.
PASS:
If first digit on HOD is 0, 1, 4, or 5, go to paragraph 11–27.
FAIL: Location of fault: replace RHE (TM 9–1427–475–20).
11–17 SIGNAL NAME:
PYLN 3 POS (ACY) P3 POSITION (ACZ)
MEMORY LOCATION: 001767
MEMORY DATA BIT(S):
4–19
(SCALAR)
CONDITION:
Monitor HOD while using the PYLON ACTG SW; memory location response should
increase when up (flight stow) is selected and decrease, then go negative when down
(ground stow) is selected.
SIGNAL FUNCTION:
Indicates pylon 3 position.
REMARKS: From PAC through RH INBD MRTU Type II to FCC. Pylon elevation positioning data.
PASS:
If CONDITION has been met, go to paragraph 11–18.
FAIL: Location of fault: external stores elevation controller, wiring from external stores elevation
controller to pylon actuator controller 3, pylon actuator controller 3, wiring from pylon actuator
controller 3 to RH INBD MRTU Type II, RH INBD MRTU Type II. Troubleshoot wiring to isolate
fault (TM 1–1520–238–T–8).
