Citation
SERVICE BULLETIN
SB680-34-27
CHANGE IN WEIGHT AND BALANCE
Negligible
REFERENCES
Cessna Model 680 Maintenance Manual
PUBLICATIONS AFFECTED
Cessna Model 680 Illustrated Parts Catalog
Cessna Model 680 FAA Approved Airplane Flight Manual
Cessna Model 680 68FM-S25-00
ACCOMPLISHMENT INSTRUCTIONS
1.
Prepare the airplane for maintenance.
A.
Make sure that all switches are in the OFF/NORM position.
B.
Disconnect electrical power from the airplane.
(1)
Disconnect the airplane battery.
(2)
Disconnect external electrical power.
C.
Attach maintenance warning tags to the battery and external power receptacle that have "DO NOT
CONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS" written on them.
2.
Replace GPS 1 and GPS 2 Modules.
A.
Get Access to MAU2 located in the right hand nose compartment.
(1)
Remove the 245-604067-001 GPS module from slot 9 in MAU 2 and return the module to
Cessna for an upgrade. (Refer to the Cessna Model 680 Maintenance Manual, Chapter 34,
Honeywell Primus Global Position System (GPS) Module - Maintenance Practices.)
NOTE: Operators: The existing 245-604067-001 modules may be modified to 245-604067-100
configuration. Contact Citation Parts Distribution (CPD) Avionics team to
schedule modification at 1.316.517.1651 or telefax 1.316.206-5044 or email
[email protected]. This will require advance notification. The CPD
Avionics team will schedule the units and arrange for their return. Please allow five to
seven days for modification. This service bulletin may not be signed off as completed
unless the units are scheduled through Citation Parts Distribution.
(2)
Install the upgraded 245-604067-100 GPS module in slot 9 in MAU 2. (Refer to the Cessna
Model 680 Maintenance Manual, Chapter 34, Honeywell Primus Global Position System (GPS)
Module - Maintenance Practices.)
B.
Get Access to MAU3 located in the aft baggage compartment.
(1)
Remove access panel 312BTC. (Refer to the Cessna Model 680 Maintenance Manual,
Chapter 6, Access Plates And Panels Identification - Description And Operation.)
Jun 25/2010
680-34-27
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