TELEDYNE CONTINENTAL
®
AIRCRAFT ENGINE
CATEGORY 3
SERVICE BULLETIN
SB 02-3
Compliance Will Enhance Safety
Technical Portions FAA Approved
SUBJECT:
MAGNETO TACHOMETER SENSORS
PURPOSE:
To advise Owners, Operators and FBO’s operating and/or maintaining Teledyne Continental Motors engines as listed in “Models Affected” of possible erratic tachometer indications
COMPLIANCE:
Within the next 100 hours of engine operation; Annual or 100 hour inspection, which ever occurs first comply with the inspection and, if required, corrective actions in accordance with this Service Bulletin and the attached Spirent Service Bulletin #1.
MODELS AFFECTED:
IO-550-G Specification 5, 6, 7 & 8; IO-550-N Specification 7, 8, 10, 11, 12, 13 &15; all TSIO-550-B; all TSIO-550-C; all TSIO-550-E engines.
GENERAL INFORMATION: Teledyne Continental Motors has received notification from Spirent Systems of manufacturing errors that affect certain tachometer sensors supplied by them to Teledyne Continental Motors. Reference attached Spirent Systems Service Bulletin #1. Affected Sensors are identified with TCM P/N 653141, Spirent P/N 0406-004, manufactured from April 1, 2000 through August 31, 2001, serial number 96299 through 113397 and TCM P/N 653852, Spirent P/N 0406-003, serial number 105353 through 111403. The magneto tachometer sensor is installed on the left hand (2-4-6 side) magneto on all IO-550-G, TSIO550-C and TSIO-550-E engines; the right hand (1-3-5 side) magneto on all IO-550-N and TSIO-550-B engines. INSPECTION: To inspect the magneto tachometer sensor, remove the engine cowling in accordance with the aircraft manufacturer’s instructions. Locate the magneto tachometer sensor and the identification tag attached to the sensor lead. Record the sensor serial number. Determine if the serial number on the sensor is within the effected serial number range provided above. If the magneto tachometer sensor serial number is not within the effected serial number range, no further action is required. ISSUED
REVISED
PAGE NO REVISION TM
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© 2002 TELEDYNE TECHNOLOGIES, INC.
CONTINENTAL MOTORS
A Teledyne Technologies Company P.O. BOX 90 MOBILE ALABAMA 36601 • 251-438-3411
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Reinstall the engine cowling. Make a logbook entry indicating compliance with this service bulletin and return the aircraft and engine to service. Be sure to include the sensor part number and serial number. If the magneto sensor serial number is within the effected serial number range, the sensor will require replacement. REPLACEMENT OF MAGNETO SENSOR: To expedite compliance with this service bulletin, replacement magneto sensors may be ordered from the from your TCM Distributor. To locate the nearest TCM Distributor go to www.tcmlink.com click on Distributor Services, then click on Distributor Locator. When placing your order please have the engine make, model, serial number and magneto tachometer sensor part number and serial number available. Refer to the applicable engine maintenance or overhaul manual for magneto removal and installation instructions. Remove the magneto that has the tachometer sensor installed. Remove the sensor from the magneto housing and clearly identify the sensor as being removed to comply with this service bulletin. Sensor will have to be returned to TCM for warranty payment. Install new sensor in bottom of magneto housing. Install magneto onto engine using a new gasket P/N 649954. Refer to TCM MSB94-8A, the engine maintenance or the engine overhaul manual for detailed instructions on timing the magneto to the engine. Perform a complete operational check of the engine, including magneto drop, magneto spread (difference between left and right magneto drop) and tachometer accuracy. Make a logbook entry indicating compliance with this service bulletin. Be sure to include the sensor part number and serial number. WARRANTY: Labor to replace the magneto tachometer sensor will be covered by Teledyne Continental Motors. No labor will be paid for the inspection. Teledyne Continental Motors will allow 1.5 man-hours labor for removal or the magneto from the engine, magneto tachometer sensor removal and installation, installation of the magneto on the engine and timing of the magneto to the engine.
ISSUED
REVISED
PAGE NO REVISION TM
MO
DAY
YEAR
01
31
2002
.
MO
DAY
YEAR
CONTINENTAL MOTORS A Teledyne Technologies Company P.O. BOX 90 MOBILE ALABAMA 36601 • 251-438-3411
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