Service difficulty report · Cdu · Lear 45LEAR

Difficulty date
September 17, 2008
Submitted
September 29, 2008
Operation
Air carrier
Aircraft
N411AJ
Make and model
Lear 45LEAR
Aircraft serial
2011
Engine
Garrtt TFE731*
Part
Cdu
Condition
Failed
Location
Fms
Part time
1,208 hours
Stage of operation
NR
How discovered
9
Nature of condition
O
Precautionary procedure
O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

INITIALLY THE FMS WOULD NOT PASS THE SELF TEST. SCREEN WAS TELLING THE TECH THAT THE CDU/RAM FAILURE. REMOVED FMS INSTALLED OVERHAULED FMS. THIS WOULD INITIALIZE PROPERLY. FMS DOWNLOADED NAV DATABASE PROPERLY. WHEN PERFORMANCE DATABASE WAS INSTALLED, IT WAS SAYING NO DISK INSTALLED. FOUND THAT THERE WAS AN INCORRECT FMS INSTALLED. ACFT SHOULD HAVE SCN 802.5 INSTALLED. THIS OVERHAULED FMS WAS A SCN 801.5, FMS SCN 802.3 INSTALLED BOTH NAVIGATION, AND PERFORMANCE. OPS CHECK WAS SATISFACTORY COMPLETED. NO OTHER DEFECTS WERE NOTED. (K)