SERVICE BULLETIN - Cessna Support
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Citation SERVICE BULLETIN MANDATORY SB680A-80-01 TITLE STARTING - ACCESSORY GEARBOX HELI-COIL INSPECTION EFFECTIVITY MODEL SERIAL NUMBERS 680A (Citation Latitude) -0222 thru -0229 NOTE: Textron Aviation-owned or Textron Aviation-authorized Service Centers are the only facilities that can complete this service document. REASON The starter generator and AC generator bolts may have been improperly torqued. In the event of an extreme hard landing the AC Generator and Starter Generator could come loose from the Accessory Gear Box (AGB). DESCRIPTION This service document provides parts and instructions to inspect the heli-coil interface and replace the bolts with longer bolts that attach the starter-generator Quick Attach Detach (QAD) and AC generator. COMPLIANCE MANDATORY. This service document must be accomplished within 60 days from the date of receipt. A service document published by Textron Aviation 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 document, including the intent therein. 2) The mechanic must correctly use and install all applicable parts supplied with the service document kit. Only with written authorization from Textron Aviation 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 document only as approved and published. 4) The mechanic or airplane owner must apply the information in the service document only to aircraft serial numbers identified in the Effectivity section of the document. 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 Textron Aviation is authorized to make or apply any changes to a Textron Aviation-issued service document or flight manual supplement without prior written consent from Textron Aviation. Textron Aviation is not responsible for the quality of maintenance performed to comply with this document, unless the maintenance is accomplished at a Textron Aviation-owned Service Center. APPROVAL Textron Aviation received FAA approval for the technical data in this publication that changes the airplane type design. SB680A-80-01 April 1, 2020 Page 1 of 7 Textron Aviation Customer Service, P.O. Box 7706, Wichita, KS 67277, U.S.A. 1-316-517-5800 This document contains technical data and is subject to U.S. export regulations. This information has been exported from the United States in accordance with export administration regulations. Diversion contrary to U.S. law is prohibited. ECCN: 9E991 COPYRIGHT © 2020
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Transcript of SERVICE BULLETIN - Cessna Support
Citation SERVICE BULLETINMANDATORY SB680A-80-01
TITLESTARTING - ACCESSORY GEARBOX HELI-COIL INSPECTION
EFFECTIVITYMODEL SERIAL NUMBERS
680A (Citation Latitude) -0222 thru -0229
NOTE: Textron Aviation-owned or Textron Aviation-authorized Service Centers are the only facilities thatcan complete this service document.
REASONThe starter generator and AC generator bolts may have been improperly torqued. In the event of anextreme hard landing the AC Generator and Starter Generator could come loose from the AccessoryGear Box (AGB).
DESCRIPTIONThis service document provides parts and instructions to inspect the heli-coil interface and replace thebolts with longer bolts that attach the starter-generator Quick Attach Detach (QAD) and AC generator.
COMPLIANCEMANDATORY. This service document must be accomplished within 60 days from the date of receipt.
A service document published by Textron Aviation may be recorded as completed in an aircraft logonly when the following requirements are satisfied:
1) The mechanic must complete all of the instructions in the service document, including the intenttherein.
2) The mechanic must correctly use and install all applicable parts supplied with the servicedocument kit. Only with written authorization from Textron Aviation can substitute parts or rebuiltparts be used to replace new parts.
3) The mechanic or airplane owner must use the technical data in the service document only asapproved and published.
4) The mechanic or airplane owner must apply the information in the service document only toaircraft serial numbers identified in the Effectivity section of the document.
5) The mechanic or airplane owner must use maintenance practices that are identified as acceptablestandard practices in the aviation industry and governmental regulations.
No individual or corporate organization other than Textron Aviation is authorized to make or apply anychanges to a Textron Aviation-issued service document or flight manual supplement without prior writtenconsent from Textron Aviation.
Textron Aviation is not responsible for the quality of maintenance performed to comply with this document,unless the maintenance is accomplished at a Textron Aviation-owned Service Center.
APPROVALTextron Aviation received FAA approval for the technical data in this publication that changes the airplanetype design.
SB680A-80-01April 1, 2020 Page 1 of 7
Textron Aviation Customer Service, P.O. Box 7706, Wichita, KS 67277, U.S.A. 1-316-517-5800This document contains technical data and is subject to U.S. export regulations. This information has been exported from the United States
in accordance with export administration regulations. Diversion contrary to U.S. law is prohibited. ECCN: 9E991
COPYRIGHT © 2020
SB680A-80-01Page 2 April 1, 2020
Citation SERVICE BULLETINMANDATORY SB680A-80-01
FLIGHT CREW OPERATIONSNo Changes
CONSUMABLE MATERIALNo specialized consumable materials are required to complete this service document.
TOOLINGNo specialized tooling is required to complete this service document.
WEIGHT AND BALANCE INFORMATIONNo change.
REFERENCESCessna Model 680A Maintenance Manual
P&WC Engine Maintenance Manual PW306D/D1
Citation Standard Practices Manual
PUBLICATIONS AFFECTEDIllustrated Parts Catalog
ACCOMPLISHMENT INSTRUCTIONS1. Prepare the airplane for maintenance.
A. Make sure that the airplane is electrically grounded.
B. Make sure that all switches are in the OFF/NORM position.
C. Disconnect electrical power from the airplane.
(1) Disconnect external electrical power.
(2) Disconnect the airplane batteries.
D. Attach maintenance warning tags to the batteries and external power receptacle that have "DO NOTCONNECT ELECTRICAL POWER - MAINTENANCE IN PROGRESS" written on them.
2. Do the Starter-Generator Quick Attach Detach (QAD) and AC Generator mounting plate bolt torquecheck as follows:
A. (Refer to Figure 1, Sheet 1.) Remove the Starter-Generator. (Refer to the Cessna Model 680AMaintenance Manual, Chapter 80, Starter-Generator - Removal/Installation.)
B. (Refer to Figure 1, Sheet 1.) Remove the AC Generator. (Refer to the Cessna Model 680AMaintenance Manual, Chapter 24, AC Generator - Removal/Installation.)
C. Remove the safety wire from the bolts that attach the Starter-Generator Quick Attach Detach (QAD)mount and the AC Generator mounting plate to the Accessory Gear Box (AGB).
D. (Refer to Figure 1, Sheet 2.) Use an indelible marker to mark the bolts that attach theStarter-Generator Quick Attach Detach (QAD) mount to the Accessory Gear Box (AGB) with awitness mark on the bolt head and housing flange.
E. (Refer to Figure 1, Sheet 2.) Use an indelible marker to mark the bolts that attach the AC Generatormounting plate to the Accessory Gear Box (AGB) with a witness mark on the bolt head andmounting plate.
F. Torque each bolt on the QAD and mounting plate to 220 in-lbs (24.85Nm).
(1) If bolt turns when applying torque, measure the approximate degree of the amount of turn untilthe proper torque is applied and record for PWC engineering. Submit findings to:P&WC Engineering at: M. Sealey, Pratt & Whitney Canada, [email protected].
Citation SERVICE BULLETINMANDATORY SB680A-80-01
Also contact Textron Aviation at: [email protected] (316)-517-1695.
(2) If bolt does not turn when applying torque no action is necessary, proceed to Step 3.
3. Remove the QAD from the AGB. (Refer to the Cessna Model 680A Maintenance Manual, Chapter 80,Starter-Generator Quick Attach Detach (QAD) Mount - Removal/Installation.)
4. Remove the bolts and the AC Generator mounting plate from the (AGB).
5. Do the AGB Heli-Coil inspection as follows:
A. Lubricate 12 NAS566-47 Bolts with engine oil (PWC03-001).
CAUTION: Do not exceed 80 in-lbs (9.04 Nm) as the bolt goes through the lock of theinsert on the step that follows.
B. Install one NAS566-47 Bolt in each of the holes of the AGB QAD mount and AC Generator mountingplate attach point (12 places) and tighten until the lock feature is fully engaged.
C. Measure and record the amount of torque necessary to remove the bolts.
NOTE: Torque measurement should be taken as the bolt head starts to turn. This is called thebreakaway torque.
(1) Make sure the breakaway torque is not less than 9.5 inch lbs (1.07 Nm).
D. If the breakaway force is not less than 9.5 inch lbs (1.07 Nm), go to Step 6.
E. If the breakaway torque is less than 9.5 inch lbs (1.07 Nm), do the steps that follow:
(1) Remove the heli-coil insert from the AGB hole. (Refer to P&WC Engine Maintenance Manual,Chapter 70, Replacement of Heli-Coil inserts.)
(2) Visually Inspect the AGB housing internal threads for damage.
(a) If the internal threads are damaged, Take photographs for submission and analysis toPWC engineering. and Textron Aviation engineering.
(b) If the visual inspection passes, do the steps that follow:
1 Use a standard .375-24 (3A) Go/No-Go gauge to accomplish an internal threadcheck on the accessory gear box housing.
2 If AGB Housing thread check does not pass, submit findings to: P&WC Engineeringat: M. Sealey, Pratt & Whitney Canada, [email protected] contact Textron Aviation at: [email protected] (316)-517-1695.
3 If the thread check on the AGB passes, replace heli-coil inserts. (Refer to P&WCEngine Maintenance Manual, Chapter 70, Replacement of Heli-Coil inserts.)
F. Repeat steps 5.A. thru 5.D. for each bolt hole on the accessory gear box QAD attach point holesand the AC Generator mounting plate holes.
6. Install the Starter Generator QAD on the engine accessory gear box with six NAS566-47 Bolts wetwith engine oil (PWC03-001) and torque to 220.0 inch-lbs (24.85 Nm). (Refer to the Cessna model680A Maintenance Manual, Chapter 80, Starter-Generator Quick Attach Detach (QAD) Mount -Removal/Installation.)
7. Install the Starter-Generator. (Refer to the Cessna Model 680A Maintenance Manual chapter 80,Starter-Generator - Removal/Installation.)
8. Install the AC Generator mounting plate on the engine AGB with six NAS566-47 Bolts wet with engine oil(PWC03-001) and torque to 220.0 inch-lbs (24.85 Nm).
9. Safety the mounting plate bolts with safety wire. (Refer to the Citation Standard Practices Manual,Chapter 20, Safetying - Maintenance Practices.)
10. Install the AC Generator. (Refer to the Cessna Model 680A Maintenance Manual, Chapter 24, ACGenerator - Removal/Installation.)
SB680A-80-01April 1, 2020 Page 3
SB680A-80-01Page 4 April 1, 2020
Citation SERVICE BULLETINMANDATORY SB680A-80-01
11. Do Steps 2 thru 10 for the opposite side engine/accessory gear box.
12. Remove the maintenance warning tags and connect the airplane batteries.
13. Make an entry in the airplane logbook that states compliance and method of compliance with this servicedocument.
NOTE: Textron Aviation recommends that compliance with all service documents is reported to amaintenance tracking system provider.• Complete a record of compliance. (Maintenance Transaction Report, Log Book Entry, or
other record of compliance.)• Put a copy of the completed record of compliance in the airplane logbook.• Send a copy of the completed record of compliance to the maintenance tracking system
provider used.
Citation SERVICE BULLETINMANDATORY SB680A-80-01
Figure 1. Accessory Gear Box (Sheet 1)
SB680A-80-01April 1, 2020 Page 5
SB680A-80-01Page 6 April 1, 2020
Citation SERVICE BULLETINMANDATORY SB680A-80-01
Figure 1. Accessory Gear Box (Sheet 2)
Citation SERVICE BULLETINMANDATORY SB680A-80-01
MATERIAL INFORMATIONOrder the parts below to install this modification.
NEW P/N QUAN-TITY
KEY WORD OLD P/N INSTRUCTIONS/DISPOSITION
NAS566-47 24 Bolt AN6H6A Discard
Please contact Textron Aviation Parts Distribution for current cost and availability of parts listed in thisservice document. Phone at 1-800-835-4000 (Domestic) or 1-316-517-5603 (International). Send email to:[email protected].
Based on availability and lead times, parts may require advanced scheduling.
SB680A-80-01April 1, 2020 Page 7
Citation OWNER ADVISORYSB680A-80-01
TITLE
STARTING - ACCESSORY GEARBOX HELI-COIL INSPECTION
TO:
Cessna Model 680A Citation Latitude Aircraft Owner
REASON
The starter generator and AC generator bolts may have been improperly torqued. In the event of anextreme hard landing the AC Generator and Starter Generator could come loose from the AccessoryGear Box (AGB).
COMPLIANCE
MANDATORY. This service document must be accomplished within 60 days from the date of receipt.
LABOR HOURS
WORK PHASE LABOR-HOURSRework 6.0
Test and Inspection 2.0
MATERIAL AVAILABILITY
PART NUMBER AVAILABILITY COST
NAS566-47 * *
Contact the Textron Aviation Parts Distribution Repair Team to schedule your unit [email protected] available 8:00 - 4:30 CST weekdays. Advance notification and coordination isrequired for Textron Aviation Parts Distribution Repair Team to effectively schedule units, ship to supplierand arrange return. A Customer Repair Request Form is available online at ww2.txtav.com/Parts thatis required to ship with every repair.
* Please contact Textron Aviation Parts Distribution for current cost and availability of parts listed in thisservice document. Phone at 1-800-835-4000 (Domestic) or 1-316-517-5603 (International). Send emailto: [email protected].
Based on availability and lead times, parts may require advanced scheduling.
WARRANTY
This service document is mandatory. Eligible airplanes may qualify for parts and labor coverage to theextent noted in the Labor Hours and Material Availability sections of this document.
Original Issue - April 1, 2020 SB680A-80-01Revision A - April 27, 2020 Page 1 of 2
Textron Aviation Customer Service, P.O. Box 7706, Wichita, KS 67277, U.S.A. 1-316-517-5800This document contains technical data and is subject to U.S. export regulations. This information has been exported from the United States
in accordance with export administration regulations. Diversion contrary to U.S. law is prohibited. ECCN: 9E991
COPYRIGHT © 2020
SB680A-80-01Page 2 Revision A - April 27, 2020
Citation OWNER ADVISORYSB680A-80-01
Eligibility: Airplanes identified within the serial number effectivity of this service document must haveactive Airframe warranty coverage on the original issue date of this document and thecoverage must be active on the day the work is accomplished.
Parts Coverage: Textron Aviation-owned and Textron Aviation-authorized Service Facilities, operators, orother maintenance facilities may submit a claim for the parts required to accomplish thisservice document as defined in the Material Availability section of this document.
Labor Coverage: Textron Aviation-owned and Textron Aviation-authorized Service Facilities rated to performmaintenance on the specific model of Cessna Aircraft may submit a claim for the labornecessary to accomplish this service document as defined in the Labor Hours section ofthis document.
CreditApplication:
After this service document has been accomplished, a claim must be submitted to TextronAviation within 30 days of the service document completion. Claims for compliance of thisservice document are to be filed as a W4 type claim.
Please submit your claim form online at ww2.txtav.com/Parts or email the completedTextron Aviation Claim Form to [email protected]. If submitted on-line a ReturnAuthorization will be provided. If a paper claim is submitted your claim will be entered intothe system and a Return Authorization will be sent to you.
The Return Authorization must accompany any required return parts (see MaterialAvailability), to the point of purchase.
Parts to be returned to Textron Aviation Parts Distribution should be forwarded to:
Textron Aviation Parts DistributionWarranty Administration285 South Greenwich RoadBldg B89, Docks 1-4Wichita, KS 67206USA
Expiration: April 30, 2022
Textron Aviation reserves the right to void continued airplane warranty coverage for the parts affected bythis service document until the service document is accomplished.
NOTE: As a convenience, service documents are now available online to all our customers through asimple, free-of-charge registration process. If you would like to sign up, please visit the CustomerAccess link at www.txtavsupport.com to register.
