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# §:

SUPERSEDES CSBIS-7

# ~**;~~-'1N~:~~~l~-~~N~ ~**  

# CRITICAL SERVICE BULLETIN CONTINENTAL MOTORS® AIRCRAFT ENGINE

COMPLIANCE NECESSARY TO MAINTAIN SAPETY


### SUBJECT: PURPOSE: TSI0550-K Oil Cooler Cross Fitting Replacement

### ~ To replace oil cooler cross fitting (part number AN9l8-ll) with a new

# ~ enhanced cross fitting 

### (PIN 658607).**~~** 

### COMPLIANCE: Prior to further flight. A maximum of 

### 5 hours flight time is authorized for

## ~ aircraft repositioning in order to comply with this bulletin.**~** 

### MODELS 

# I AFFECTED: New and rebuilt TSI0550-K aviation gasoline (AvGas) engine models using oil

## ~ cooler cross fitting 

### PINAN918-1J with engine serial numbers priorto 1012296.**~** 

### I. GENERAL INFORMATION

# ~ Continental Motors, Inc. (CMI) published CSB15-2 upon discovering isolated occurrences in

## ~ whichthere was a loss ofengine oil due to a fractured nipple fitting between the cross fitting and '-"' 

### the pipe bushing at the oil cooler. Design improvements consolidate the oil cooler cross fitting '-." stack-up into a single part, significantly increasing the strength and providing a simplified '\.." procedure for installing the oil cooler cross fitting found on specified TSI0550 engines.

### If~ CSB15-2 waspreviously complied with on the TS/0550-K engine, nofurther action is

### ~ required. Modifications described herein on engine serial numbers 1012296 andhigher were

## ~ accomplishedatthe factory. '-.' WARNING

## ~ It is critical to follow ALL "Standard Practices" within your '-' Maintenance and Overhaul Manual when connecting fittings '-"-

# ~-**~** II. 

### BACKGROUND INFORMATION "-

...... CMI has made several design enhancements to the cross fitting configuration that provides

# ~ lubricating oil to the turbocharger bearings, and, in some cases, the oil pressure sensor.

### ~ Located in your M-18 (29 May 20 15), or later revision, Maintenance and Overhaul Manual:**~** 

### 1. Chapter 17 provides detailed instructions on installing the pipe fittings found onthe oil '\,."'\; cooler and the authorized pipe sealant to be used.**~** 2. 

### Appendix B 

### provides the "General Torque Specifications•• to be used when tightening

### ~ tlw

# p~::~~~**:di:::;::~al** tofollow Standard Practices to prevent

# ~ applying twistingorshear loads, orover torquingthe mated fittings.

### ~ 3. Appendix C provides specific instructions to properly support equipment during '-' installation offittings and/or B-nuts (reference section C-12, "Hose and Tubing '' Installation.""

## ~

# ~**~ ~**  ISSUED REVISED

# ~~ PAGE NO DOC NO REVISION**~-** 

## "'**~=-----** 2015/11/06 2015/11/10 1 

### of6 CSB15-7 

### A P.O. Box 90 Mobile, AL 251-436-8299 ©2015 Continental Motors, Inc.

### Design enhancements: 1. 

### Eliminate the pipe bushing and nipple fitting stack-up (see Figure 1) typically found between the cross fitting and the oil cooler and replaces them with a single cross fitting 

### (PIN 658607). 

### 2. Provide a larger tool surface area on the cross fitting for support 'Nfenches during Subsequent fitting and B-nut installation. 

## I

\.Bushing, typ.

## '@.~ Nipple, typ._/
Cross, typ.



### TSI0550-K Figure 1. Cross Fitting Stack-Up, Prior Configuration

Elbow'**.-~**

### ~- '-Plug

# Cros~.. Plug Fitting :**··~**

### ~ 

### fiif.--_ Flared Nipple


### TSI0550-K Figure 2. Cross Fitting, NEW Configuration

ISSUED REVISED

### ~**~** ,**r-~~==--t-~~~~ ~~--~**  2015/11/06 2015/11110 P.O. Box 90 Mobile, AL 251-436-8299 PAGE NO DOC NO 2 of 6 CSB15-7 REVISION 

### AIIJ. ACTIONREQUIRED REMOVE AND REPLACE the superseded parts with new cross fitting 

### (PIN 658607) using the same procedures located in yam M-18 Maintenance and Overhaul Manual. Reference the latest revision ofthe CMI Illustrated Parts Catalog (IPC) to determine applicable additional connectors, elbows, orplugpartnumbers and adjust the instructions accordingly.

OLD FITTING

AN911MJ NEW FITTING 658607 Figure 3. Cross Fitting, Comparison
WARNING 

### Use eye protection when cutting safety wire to prevent eye injury. 1. Remove and discard safety wire securingvematherm to oil coolerpipe bushing. 2. Follow the detailed instructions for removing and installing pipe fittings found on oil coolers (Chapter 17-6) using sealant specified. 3. Use a minimum 1 OX magnifying lens to visuallyinspect outboard portthreads atthe aft side ofthe oil cooler for contamination, distortion, or damage before installing new cross fitting 

### (PIN 658607).

a. Ifdetermined serviceable, continue installing new cross fitting. b. Ifthere is evidence ofcontamination or damage, please contact Continental Motors Customer Service Departmentdirectly at 1(800) 326-0089. 4. Reference Appendix B, "General Torque Specifications" for torque pipe fitting installation instructions (NPTF threads):

a. Screw the cross fitting (PIN 658607) into the outboard port (atthe aft side ofthe oil cooler) to the finger tight position. b. Wrench tighten the cross fitting to the appropriate clocking of fitting within 1-3 turns from the finger tight position. Minimumtorque of 185 in/lbs mustbe achieved upon clocking position offitting.

NOTE: The fitting is not to be loosened in order to achieve proper alignment (clocldng). Torque values specified are for reference only. Torque values must be used on otherpipe fittings or plugs where clocking is notrequired. 5. Reference Appendix C, "Hose and Tubing Installation" when installing fittings and/or B-nuts.

PAGE NO DOC NO 

## A P.O. Box 90 Mobile, Al251-436-8299 REVISION

## 1--.!:IS:!::S~U~E:!:D:.._~R~E=:Y~I:!SE=:D~ , 

# <=:1@:=>" 2015/11/06 2015/11/10 3 of6 CSB15·7CAUTION: It is critical to supportpipe fittings and follow Standard Practices to prevent applying twisting or shear loads, or over torquing the mated fittings.



### a. Use a wrench on both mating connectionsto avoid applying excessive torque to the fittings. Securely tighten fittings and torque to the specified value in Appendix B. 

### Torque the hose or tubing end fitting while maintaining sufficient force on adjacent fittings to prevent twisting and shear loads.

CAUTION: Do notexceedspecifiedtorque values. 

### b. Supportthe last fitting in the assembly on components that contain multiple fittings coupled in one location (see Figure 4). DO NOT over-torque fittings.

Fitting to be "Clocked"

Support Fitting with Open End Wrench

Figure 4. Hose and Tube Installation Support 

### 6. Install new safety wire securing vernatherm to cross fitting. Reference Appendix C-4, "Safety Wire Hardware" to properly secure hardware. 7. Conduct a nonnal engine start and ground nm-up according to your Airplane Flight Manual/Pilot's Operating Handbook (AFM/POH) provided by the airframe manufacturer. 8. Perform a visual leak check of the serviced area, after shut-down, prior to placing aircraft in service. 9. Make appropriate logbook entries detailing compliance actions taken in accordance with this Critical Service Bulletin (CSB15-7). The logbook entry must include a complete listing ofparts used in this installation. 10.Return aircraft to service.

ISSUED REVISED

## ~==e==~/ PAGE NO DOC NO REVISION 2015/11/06 2015/11/10 4 of6 CSB15-7 

### A P.O. Box 90 Mobile, AL 251-436-8299IV. WARRANTY This Critical ServiceBulletin is your authorization to perform the required inspection, replace the affected part(s), and receive warranty reimbursement, limited to the "Models Affected" and compliance action required as defined within. Contact your authorized Continental Motors distributor for warranty claim application andparts return instructions. Contact Continental Motors Technical Services at one ofthe numbers listed below ifyou have any questions concerningthe technical content ofthis Critical Service Bulletin. 1.888.826.5465 +1.251.436.8299 +1.305.964.0872 toll free inUnited States international callers 

### en Espafiol

NOTE: Visit the Continental Motors web site at \VW\v.continentalmotors.aero to obtain copies of Continental Motors Warranty Policies. A. Allowances/Reimbursements Table 1 Labor allowance shall be· Scope ofWork Remove and replace superseded parts.
B. Illustrated Parts Catalog Instructions Labor Allowance (hr) 1.0

Replacement parts required to comply with this bulletin are published in the illustrated parts catalogs on the Continental Motors web site and may be ordered through any authorized ContinentalMotors distributor. NOTE: To find an authorized Continental Motors distributor, follow this linlc hUp:l/www.continentalmotors.acro/ Support Materials/Authorized Distributor Listing/

2015/11/06 2015/11/10 5 of6IntentionallyLeftBlank

## ~;= ISSUED REVISED PAGE NO DOC NO REVISION 2015/11/06 2015/11/10 6 of6 CSB15-7 

### A P.O. Box 90 Mobile, AL 251-436-8299