TM 1–1520–238–T–1
Change 5
4–63
4–9
PNVS – INTERACTIVE FD/LS CHECK (cont)
4–9
TASK
RESULT
NOTE
If the advisory message TEST IN
PROGRESS does not appear within 2
seconds after initiating a PNVS FD/LS check,
the TEU has failed and testing is halted; go
to TM 1-1270-476-T and perform TADS –
OPERATIONAL CHECK.
The FCC software can detect a boresight
corrector loss for a weapon and/or sighting
system. Flight crew or maintenance
personnel are advised of the degraded
accuracy on the high–action–display.
Continuous and maintenance FD/LS
messages are displayed upon selection.
e. On DEK, press and
release ()/0 and
YZ*/9 keys (ADC).
On CDU, press and
The advisory message TEST
IN PROGRESS is displayed
for about 1.5 minutes during
automatic part of initiated BIT.
release 0 and 9 keys
(ADD).
If a prompt appears before
the TEST IN PROGRESS
message appears, perform
the required actions on the
optical relay tube (ORT) or
aircraft controls.
NOTE
Some prompts that contain (ACK) responses
are automatically acknowledged for the
operator by the TADS computer when the
required actions are performed. These prompts
do not require operator interaction. Failure to
respond appropriately results in an invalid
FD/LS check.
