Citation
SERVICE BULLETIN
REVISION
Revision 1
SB560-32-25
TRANSMITTAL SHEET
This sheet transmits Revision 1 to SB560-32-25.
A. Added Steps 18R and 18T to disconnect and reconnect the airplane battery.
B. Removed the wires marked 25PC005-4PC007, XP9-/BJN002, and 25PI007-/BLKDC021 from the
MATERIAL INFORMATION section.
C. Added the identification sleeves marked 25PI007-/BLKDC021 and 25PC005-4PC007.
D. Changed Figure 2 to reflect the changes in wiring and to add clarification to the installation.
E. Added Steps 8 and 14 to remove and install the pilot’s instrument panel.
F.
Added Steps 10 and 12 to remove and install the logic module box.
G. Changed Step 6 and added Step 20 to remove and install access panels in the nose baggage
compartment.
NOTE: This revision replaces the original issue of SB560-32-25 in its entirety.
NOTE: Change bars and pointing hands are not used in this publication to denote revised material. This
transmittal sheet provides a complete description of the changes made by this revision, except for
editorial changes.
REVISION COMPLIANCE
NO EFFECT. Airplanes previously modified by this service bulletin are not affected by this revision.
SUMMARY OF REVISIONS
Original Issue
Dec 1/2002
Revision 1
Jan 8/2004
SERVICE BULLETIN
Citation
SB560-32-25
TITLE
LANDING GEAR - BRAKE LOW PRESSURE NON-CANCELABLE MASTER CAUTION IMPROVEMENT
EFFECTIVITY
MODEL
SERIAL NUMBERS
560
-0539 thru -0616
The equivalent of this service bulletin has been incorporated on production airplanes -0617 and On.
REASON
To prevent master caution cancellation during low brake pressure conditions on the ground. To eliminate
the possibility of the crew not being alerted when the brake system is not functional.
DESCRIPTION
This service bulletin provides parts and instructions to modify the wiring of the low brake pressure master
caution circuit to include two time delay relays and associated hardware. Accomplishing this service
bulletin will eliminate the ability to cancel the low brake pressure annunciation and associated master
caution during low brake pressure conditions.
COMPLIANCE
RECOMMENDED. This service bulletin should be accomplished during a scheduled maintenance period
or phase inspection.
A service bulletin published by Cessna Aircraft Company may be recorded as “completed” in an aircraft
log only when the following requirements are satisfied:
1)
The mechanic must complete all of the instructions in the service bulletin, including the intent
therein.
2)
The mechanic must correctly use and install all applicable parts supplied with the service bulletin
kit. Only with written authorization from Cessna Aircraft Company can substitute parts or rebuilt
parts be used to replace new parts.
3)
The mechanic or airplane owner must use the technical data in the service bulletin only as
approved and published.
4)
The mechanic or airplane owner must apply the information in the service bulletin only to aircraft
serial numbers identified in the “Effectivity” section of the bulletin.
5)
The mechanic or airplane owner must use maintenance practices that are identified as acceptable
standard practices in the aviation industry and governmental regulations.
No individual or corporate organization other than Cessna Aircraft Company is authorized to make or
apply any changes to a Cessna-issued service bulletin, service letter, or flight manual supplement without
prior written consent from Cessna Aircraft Company.
Cessna Aircraft Company is not responsible for the quality of maintenance performed to comply with this
document, unless the maintenance is accomplished at a Cessna-owned Citation Service Center.
FLIGHT CREW OPERATIONS
See Attached Flight Crew Operations Summary.
Dec 1/2002
Revision 1 - Jan 8/2004
560-32-25
Page 1 of 12
Cessna Aircraft Company, Citation Marketing Division, P.O. Box 7706, Wichita, KS 67277, U.S.A. 1-316-517-6000, Fax 1-316-517-8500
COPYRIGHT © 2002
SERVICE BULLETIN
Citation
SB560-32-25
APPROVAL
FAA approval has been obtained on technical data in this publication that affects airplane type design.
This information shall be considered an amendment to the Cessna Manufacturer’s Maintenance Manual
and should be accomplished within the specified time requirement.
MANPOWER
WORK PHASE
MAN-HOURS
Modification
*
MATERIAL - Cost and Availability
PART NUMBER
AVAILABILITY
COST
SB560-32-25
*
*
* Refer to the attached Service Bulletin Supplemental Data sheet for man-hours, material cost and
availability, and warranty information.
TOOLING
NAME
NUMBER
Landing Gear Squat 6688002-1
Switch Breakout Box
MANUFACTURER
Cessna Aircraft Company
7121 Southwest Boulevard
Wichita, KS 67215
USE
To do a functional test of
the brake low pressure
indication.
CHANGE IN WEIGHT AND BALANCE
MODEL
560
WEIGHT INCREASE
+0.76 Pounds
RESULTANT MOMENT
+86.6 Inch-Pounds
MOMENT/100
+0.87 Inch-Pounds
REFERENCES
Cessna Model 560 Maintenance Manual
Cessna Model 560 Encore Wiring Diagram Manual
PUBLICATIONS AFFECTED
Cessna Model 560 Illustrated Parts Catalog
Cessna Model 560 Encore Wiring Diagram Manual
Cessna Model 560 Maintenance Manual
ACCOMPLISHMENT INSTRUCTIONS
1.
Ensure that all switches are in the OFF/NORM position and disconnect electrical power from the
airplane by disconnecting the battery and external electrical power. Attach maintenance warning tags
to the battery and external power receptacle stating: DO NOT CONNECT ELECTRICAL POWER MAINTENANCE IN PROGRESS.
2.
Remove the pilot’s seat. (Refer to the Maintenance Manual, Chapter 25, Flight Crew Seats - Maintenance
Practices.)
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560-32-25
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SERVICE BULLETIN
Citation
SB560-32-25
3.
(Refer to Figure 1, Detail A.) Remove the left circuit breaker panel. Keep the attaching hardware. (Refer to
the Maintenance Manual, Chapter 24, Main Circuit Breaker Panels - Maintenance Practices.)
4.
Install the 76598-200 Time Delay Relay and the 76598-5 Relay to the left circuit breaker panel.
A.
(Refer to Figure 1, Detail B.) Locate and drill four Number 30 (0.128 inch diameter) holes through the
left circuit breaker panel and the 6598180-13 Angle Assembly at the locations shown. Countersink
the holes 100 x 0.189 inch diameter. Deburr the holes.
B.
(Refer to Figure 1, Detail B.) Install one 6598180-13 Angle Assembly to the left circuit breaker panel
using four CM3827AD4-4 Rivets at the locations shown.
C.
(Refer to Figure 1, View A-A.) Install the 6518126-18 Relay Bracket Assembly to the 6598180-13
Angle Assembly using two MS35206-230 Screws.
D.
(Refer to Figure 1, View B-B.) Install one each 76598-200 Time Delay Relay and the 76598-5 Relay
to the 6518126-18 Relay Bracket Assembly using four MS35206-227 Screws.
5.
Remove the left cockpit side console (access panel 241AL) to get access to the wire bundles. (Refer to the
Maintenance Manual, Chapter 6, Access Plates and Panels Identification - Description and Operation.)
6.
Open the left hand nose baggage door to get access to the wire bundles. Remove any access panels as
necessary.
7.
Remove the instruments from the left and center instrument panels as necessary to get access to the wire
bundles forward of the pilot’s instruments. (Refer to the Maintenance Manual, Chapter 31, Instruments Maintenance Practices.)
8.
Remove the pilot’s instrument panel. (Refer to the Maintenance Manual, Chapter 31, Instrument Panel Maintenance Practices.)
9.
Remove the annunciator panel. (Refer to the Maintenance Manual, Chapter 31, Master Warning, Master
Caution and Annunciator Panel Lights System - Maintenance Practices.)
10.
Remove the logic module box to access wires. Do not disconnect wires from the box. (Refer to the
Maintenance Manual, Chapter 24, Left Side Console Logic Module Box - Maintenance Practices.)
11.
(Refer to Figure 2.) Change the electrical wiring as shown. (Refer to the following sections of the Wiring
Diagram Manual, Chapter 20: Wiring - Maintenance Practices, Splices and Terminals, and Electrical
Connectors.)
12.
Install the logic module box. (Refer to the Maintenance Manual, Chapter 24, Left Side Console Logic
Module Box - Maintenance Practices.)
13.
Install the annunciator panel. (Refer to the Maintenance Manual, Chapter 31, Master Warning, Master
Caution and Annunciator Panel Lights System - Maintenance Practices.)
14.
Install the pilot’s instrument panel. (Refer to the Maintenance Manual, Chapter 31, Instrument Panel Maintenance Practices.)
15.
Install any instruments that were removed in Step 7. (Refer to the Maintenance Manual, Chapter 31,
Instruments - Maintenance Practices.)
16.
(Refer to Figure 1, Detail A.) Install the left circuit breaker panel. (Refer to the Maintenance Manual,
Chapter 24, Main Circuit Breaker Panels - Maintenance Practices.)
17.
Remove maintenance warning tags and connect the airplane battery.
18.
Do a functional test of the affected system as follows:
A.
Connect a 6688002-1 Landing Gear Squat Switch Breakout Box to the left main landing gear. (Refer
to the Maintenance Manual, Chapter 32, Landing Gear Warning Indication - Maintenance Practices.)
B.
Set the switches on the landing gear squat switch breakout box to simulate the airplane in flight with
the landing gear down and locked.
(1)
Set the SQUAT SWITCH (S3) to IN AIR.
(2)
Set the DOWN LOCK SWITCH (S2) to DOWN.
Dec 1/2002
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560-32-25
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SERVICE BULLETIN
Citation
SB560-32-25
(3)
Make sure that the UP LOCK SWITCH (S1) is not in the UP position.
C.
Make sure that the WARN LT 1, WARN LT 2, and the PWR BRAKES circuit breakers are engaged.
D.
Put the battery switch in the ON position.
NOTE: You can use external power if it is available.
E.
Make sure that the LO BRK PRESS annunciator is not on.
NOTE: The LO BRK PRESS annunciator may come on when the battery is first turned on if the
brake pressure is low. It should go off within a few seconds.
F.
Disengage the PWR BRAKES circuit breaker.
G.
Fully depress and release the pilot or copilot brake pedals and repeat until the LO BRK PRESS
annunciator comes on.
H.
Wait 20 seconds.
I.
Make sure that the LO BRK PRESS annunciator flashes continuously and that the MASTER
CAUTION annunciators come on.
J.
Wait 25 to 35 seconds.
K.
Press either MASTER CAUTION annunciator switch and make sure that the MASTER CAUTION
annunciator goes off and that the LO BRK PRESS annunciator stops flashing and comes on steady.
L.
Set the switches on the landing gear squat switch breakout box to simulate the airplane on the
ground.
(1)
Set the SQUAT SWITCH (S3) to ON GROUND.
(2)
Make sure that the DOWN LOCK SWITCH (S2) is in the DOWN position.
(3)
Make sure that the UP LOCK SWITCH (S1) is not in the UP position.
M.
Wait 15.5 to 25.5 seconds.
N.
Make sure that the LO BRK PRESS annunciator flashes continuously and that the MASTER
CAUTION annunciators come on.
O.
Press both MASTER CAUTION annunciator switches.
P.
Make sure that the LO BRK PRESS annunciator continues to flash and that the MASTER CAUTION
annunciators remain on.
Q.
Put the battery switch in the OFF position.
R.
Disconnect the airplane battery and external electrical power if installed.
S.
Wait 20 seconds.
T.
Connect the airplane battery.
U.
Put the battery switch in the ON position.
V.
Make sure that the LO BRK PRESS annunciator comes on steady and that the MASTER CAUTION
annunciators do not come on.
W.
Wait 15.5 to 25.5 seconds.
X.
Make sure that the LO BRK PRESS annunciator continues to flash and that the MASTER CAUTION
annunciators come on.
Y.
Press both MASTER WARN reset switches.
Z.
Make sure that the LO BRK PRESS annunciator continues to flash and that the MASTER CAUTION
annunciators remain on.
AA. Press both MASTER CAUTION annunciator switches.
Dec 1/2002
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560-32-25
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SERVICE BULLETIN
Citation
SB560-32-25
AB. Make sure that the LO BRK PRESS annunciator continues to flash and that the MASTER CAUTION
annunciators remain on.
AC. Engage the PWR BRAKES circuit breaker.
AD. Make sure that the LO BRK PRESS and the MASTER CAUTION annunciators go off.
AE. Disconnect the 6688002-1 Landing Gear Squat Switch Breakout Box from the airplane. (Refer to the
Maintenance Manual, Chapter 32, Landing Gear Warning Indication - Maintenance Practices.)
19.
Do a functional test of any instruments that were removed in Step 7. (Refer to the applicable chapters and
sections of the Maintenance Manual.)
20.
Install any access panels that were removed in the nose baggage compartment.
21.
Close the left hand nose baggage door.
22.
Install the left cockpit side console (access panel 241AL). (Refer to the Maintenance Manual, Chapter 6,
Access Plates and Panels Identification - Description and Operation.)
23.
Install the pilot’s seat. (Refer to the Maintenance Manual, Chapter 25, Flight Crew Seats - Maintenance
Practices.)
24.
Ensure that the Flight Crew Operations Summary included with this service bulletin is given to the crew to
inform them of the operational changes resulting from incorporation of this service bulletin.
25.
Make an entry in the airplane logbook stating this service bulletin has been accomplished. Fill out and
forward a Maintenance Transaction Report indicating compliance to: CESCOM, P.O. Box 7706, Wichita,
KS 67277.
MATERIAL INFORMATION
NOTE: The parts included in this service bulletin cover installation for one airplane.
NEW P/N
QUANTITY
KEY WORD
OLD P/N
SB560-32-25
1
Kit, consisting of the following
parts:
AN508-6-4
1
Screw
None
CM3827AD4-4
4
Rivet
None
C489215
36 inches
Wire (Marked EEP131 /BLKKC003)
None
C489215
36 inches
Wire (Marked 2CB44 /REDKC003)
None
C489215
60 inches
Wire (Marked /BLKDC024 EEJ131)
None
C489215
6 inches
Jumper Wire
None
C489215
36 inches
Wire (Marked /REDKC004 /REDKC003)
None
C489242
72 inches
Wire (Marked /27PC046 7PC007)
None
C489242
36 inches
Wire (Marked CCP131 /GRNKC003)
None
Dec 1/2002
Revision 1 - Jan 8/2004
INSTRUCTIONS/
DISPOSITION
560-32-25
Page 5
Citation
SERVICE BULLETIN
SB560-32-25
NEW P/N
QUANTITY
KEY WORD
OLD P/N
C489242
36 inches
Wire (Marked /WHTDC027 /YELKC003)
None
C489242
36 inches
Wire (Marked FFP131 /YELKC004)
None
C489242
36 inches
Wire (Marked /YELKC004 /ORNKC003)
None
C489242
36 inches
Wire (Marked SP131 /BRNKC004)
None
C489242
90 inches
Wire (Marked /SP250 /BLKDN008)
None
C489242
24 inches
Wire (Marked 5PC007 - /XJ9) None
C489242
24 inches
Wire (Marked 8PC007 - /XJ9) None
C489242
108 inches
Wire (Marked UP1271 6PC007)
None
C489242
6 inches
Jumper Wire
None
C489242
144 inches
Wire (Marked LPI014 KJ131)
None
C489242
144 inches
Wire (Marked MPI014 56J1B)
None
C489242
40 inches
Wire (Marked 57J1B - SJ131) None
C489242
50 inches
Wire (Marked MJI014 2CS194)
None
C489242
50 inches
Wire (Marked LJI014 2NCS194)
None
C489242
36 inches
Wire (Marked KP131 /WHTKC003)
None
C489242
50 inches
Wire (Marked 56P1B 2NCS41)
None
C489242
50 inches
Wire (Marked 57P1B 2CS41)
None
C489242
96 inches
Wire (Marked /38PI006 BBJ131)
None
C489242
60 inches
Wire (Marked AJ9 - CCJ131)
None
C489242
132 inches
Wire (Marked 40PI007 FFJ131)
None
LMD4001S
1
Connector
None
LMD4120-96LD
9
Socket
None
LMD7102P
1
Diode Module
None
LMS01T-TL
1
Splice Connector
None
MS35206-230
2
Screw
None
Dec 1/2002
Revision 1 - Jan 8/2004
INSTRUCTIONS/
DISPOSITION
560-32-25
Page 6
Citation
SERVICE BULLETIN
SB560-32-25
NEW P/N
QUANTITY
KEY WORD
OLD P/N
MS35206-227
4
Screw
None
M39029/12-149
1
Contact
None
M39029/4-110
1
Pin
Same
M39029/58-360
2
Pin
None
M39029/5-115
3
Socket
None
M39029/63-368
1
Socket
None
M81714/65-20-2
1
Splice
Same
M81824/1-1
18
Splice
None
S2099-6
10
Socket
None
S2353-3
2
Pin
None
S3106-3
4
Diode Assembly
None
TC4001
5
Capnut
None
TMSSCE3/32-2.0-9
2
Identification Sleeve (Marked
25PC005 - 4PC007)
None
TMSSCE3/32-2.0-9
2
Identification Sleeve (Marked
25PI007 - /BLKDC021)
None
6518126-18
1
Relay Bracket Assembly
None
6598180-13
1
Angle Assembly
None
66103-1
9
Pin
None
76598-200
1
Time Delay Relay
None
76598-5
1
Relay
None
SB560-32-25
1
Instructions
Dec 1/2002
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INSTRUCTIONS/
DISPOSITION
560-32-25
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SERVICE BULLETIN
SB560-32-25
Figure 1. Relay Installation (Sheet 1)
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SERVICE BULLETIN
SB560-32-25
Figure 1. Relay Installation (Sheet 2)
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SERVICE BULLETIN
SB560-32-25
Figure 2. Wiring Modification (Sheet 1)
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560-32-25
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SERVICE BULLETIN
SB560-32-25
Figure 2. Wiring Modification (Sheet 2)
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SERVICE BULLETIN
SB560-32-25
Figure 2. Wiring Modification (Sheet 3)
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560-32-25
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Citation
ATTACHMENT
SB560-32-25
FLIGHT CREW OPERATIONS SUMMARY
This summary provides additional information for the flight crew regarding operational changes as a result
of accomplishment of this service bulletin. Please remove this summary from the service bulletin and give
it to the flight crew. This summary is informational only and does not supersede any information in the
FAA Approved Airplane Flight Manual.
As a result of accomplishing this service bulletin, during low brake pressure conditions on the ground, the flight
crew will not have the ability to extinguish the master caution annunciator. Master caution reset may occur only
after the low brake pressure condition is corrected.
SERVICE BULLETIN
SUPPLEMENTAL DATA
Citation
SB560-32-25
TITLE
LANDING GEAR - BRAKE LOW PRESSURE NON-CANCELABLE MASTER CAUTION IMPROVEMENT
EFFECTIVITY
MODEL
SERIAL NUMBERS
560
-0539 thru -0616
The equivalent of this service bulletin has been incorporated on production airplanes -0617 and On.
MANPOWER
WORK PHASE
MAN-HOURS
Modification
40.0
MATERIAL - Cost and Availability
PART NUMBER
AVAILABILITY
COST
SB560-32-25
*
*
* Please contact Citation Parts Distribution for current cost and availability of parts listed in this service
bulletin. Phone at 1-800-835-4000 (Domestic) or 1-316-517-7542 (International). Send Email to:
citationparts@cessna.textron.com or telefax at 1-316-517-7711.
Based on availability and lead times, parts may require advanced scheduling.
In cases where the required part(s) are available as exchange, order the exchange part and, upon
completion, expedite the return of the removed core to avoid return penalties. Contact the Citation Parts
Distribution Sales Desk for availability of exchange parts.
Dec 1/2002
560-32-25
Page 1 of 2
Cessna Aircraft Company, Citation Marketing Division, P.O. Box 7706, Wichita, KS 67277, U.S.A. 1-316-517-6000, Fax 1-316-517-8500
COPYRIGHT © 2002
Citation
SERVICE BULLETIN
SUPPLEMENTAL DATA
SB560-32-25
WARRANTY CREDIT PROGRAM
This bulletin is recommended. Eligible airplanes may qualify for parts and labor coverage, as described
below.
Eligibility:
Citations identified within the serial number effectivity of this service bulletin which are
within the five year warranty period on the original issue date of this bulletin.
Parts Coverage:
Authorized Citation Service Facilities, operators, or other maintenance facilities may submit
a Citation Credit Claim Form for the parts required to accomplish this bulletin.
Labor Coverage:
Authorized Citation Service Facilities may submit a Citation Credit Claim Form for the labor
necessary to accomplish this service bulletin. Please note Manpower Requirements for
coverage guidelines. If actual labor differs from coverage guidelines, claim actual labor and
detail all discrepancies.
Credit
Application:
All work must be completed and the Citation Credit Claim Form submitted before the date
shown below. Send the Citation Credit Claim, along with any required parts (see Material
Information), to the point of purchase.
Parts to be returned to Citation Parts Distribution should be forwarded to:
Citation Warranty Administration
7121 Southwest Boulevard
Wichita, KS 67215
USA
Expiration:
Dec 1/2002
Dec 31/2004
560-32-25
Page 2