ACR Electronics Cobham C406-1 Series Abbreviated Component Maintenance Manual page 49

COBHAM AVIONICS WULFSBERG ELECTRONICS
ABBREVIATED COMPONENT MAINTENANCE MANUAL
CODE PROBABLE CAUSE
3-Flash
(cont.)
Improper programming
Transmitter module faulty
Aircraft navigation system off
Faulty system interface wiring or
5-Flash
No 453-6500 ELT/NAV Interface installed
7-Flash Operating time is >1 hour
Electrical circuits faulty
C406-1 (453-5002), C406-1HM (453-5003)
Low power output
Indicates there is no navigation position data present
connections
Indicates a battery problem
POSSIBLE SOLUTION
Battery low
3A fuse on battery pack circuit board
faulty
Verify 406 MHz programming
Cannot be repaired in field - Return to
factory for servicing
Turn on navigation system
Check wiring and connections for
continuity and security
Install 453-6500 ELT/NAV Interface
Reprogram to short message
Replace battery pack
25-62-10
Page 49 of 90
APR 06/10