SUBJECT: Hartzell Engine Technologies Service Information Letter A-138

Transcription

1 TELEDYNE CONTINENTAL AIRCRAFT ENGINE SERVICE BULLETIN Contains Important Information Pertaining to Your Aircraft Engine. Compliance Will Enhance Safety SUBJECT: Hartzell Engine Technologies Service Information Letter A-138 Category 3 SB11-1A Technical Portions FAA Approved PURPOSE: Provides alternator inspection and diode cover replacement instructions for the TCM P/N alternator assembly COMPLIANCE: As directed by Hartzell Engine Technologies SIL A-138 see bulletin copy attached MODELS AFFECTED: IO-550-N, IOF-550-N, TSIO-550-K, TSIOF-550-D General: Hartzell Engine Technologies has issued Service Information Letter A-138 that discusses the TCM P/N alternator inspection and diode cover replacement instructions This bulletin calls for replacement of the early design alternator diode cover. TCM cover kit P/N is identical to H.E.T. cover kit P/N and is available from TCM distributors. Teledyne Continental Motors requires compliance with this service bulletin as shown above. Noncompliance with this bulletin may cause damage to the alternator and loss of electrical power in flight. Warranty All questions concerning the inspections and replacement required by this bulletin shall be directed to: Hartzell Engine Technologies 2900 Selma Highway Montgomery, AL ISSUED REVISED PAGE NO REVISION MO DAY YEAR MO DAY YEAR Teledyne Continental Motors, Inc. A Teledyne Technologies Company 1 of 1 P.O. Box 90 Mobile Alabama SB TELEDYNE CONTINENTAL MOTORS, INC. TM A

2 Service Information Letter 2900 Selma Highway Montgomery, AL USA Tel: Fax: Letter No. A-138 Issue Date: Nov. 17, 2010 ES ALTERNATOR INSPECTION & DIODE COVER REPLACEMENT INTRODUCTION: It has come to the attention of Hartzell Engine Technologies, LLC (HET), formerly Kelly Aerospace Energy Systems, LLC (KAES), that all ES alternators may experience cracks in the original diode cover (P/N 40538). These cracks are related to vibration experienced in service use over time. The vibration causes the cover to crack and in extreme cases will allow the cover to come in contact with the Aux terminal shorting it to ground and damaging the terminal and diodes. This condition, left uncorrected, may eventually lead to the degradation or loss of alternator function. This Service Information Letter is being issued to recommend inspection of ES alternator and replacment of the existing P/N diode cover with a new HET P/N diode cover. (All serial numbers, see effectivity below.) COMPLIANCE: At the next regularly scheduled inspection event or annual inspection, which ever comes first. EFFECTIVITY: All Aircraft* utilizing a HET or KAES ES alternator installed with a P/N diode cover. (See method of identification Figure 3.) * Includes but not limited to: Cirrus model aircraft and Teledyne Continental Motors engines. For questions concerning this instruction please contact HET, Service Dept. at (888) Contact your local HET distributor to purchase available service parts. New Hartzell Engine Technologies SIL A-138 Page 1 of 4

3 PROCEDURE: CAUTION: THIS PROCEDURE MUST BE PERFORMED BY COMPETENT AND QUALIFIED PERSONNEL FAMILIAR WITH ENGINE AND AIRFRAME MAINTENANCE THAT IS SPECIFIC TO THE ELECTRICAL SYSTEM. FAILURE TO DO SO MAY RESULT IN ECONOMIC LOSS, EQUIPMENT DAMAGE, AND/OR PHYSICAL INJURY. CAUTION: DO NOT DEPEND ON THIS SERVICE INFORMATION LETTER FOR GAINING ACCESS TO THE AIRCRAFT OR ENGINE. THIS INSTRUCTION REQUIRES THAT YOU USE THE APPLICABLE MANUFACTURER S MAINTENANCE MANUALS. IN ADDITION, ANY PREFLIGHT OR IN FLIGHT OPERATIONAL CHECKS REQUIRE USE OF THE APPROPRIATE AFM OR POH. 1. Access the aircraft alternator by removing the engine cowling and panels as required in accordance with instructions contained in the applicable aircraft maintenance manual. 2. Identify whether the alternator has a old or new style cover by observing Figure 3. If new style (with no cracks), proceed to Return to Service section. If old style, continue with this instruction. 3. Remove all electrical power from the aircraft before beginning work. Assure that the aircraft battery has been disconnected and that no external power is connected. 4. It may be necessary to remove the alternator from the engine to accomplish the cover replacement. If so or if the alternator needs to be replaced, remove the alternator in accordance with instructions contained in the applicable engine service instructions and/or the aircraft maintenance manual. 5. Before replacing the cover, examine the Aux terminal for damage. If there is evidence of arcing or in extreme cases, chafing of the terminal as shown below in Figure 1, replace with a new or rebuilt alternator then proceed to Return to Service section. (Any arcing or contact of the cover to the Aux terminal can damage the diodes.) CAUTION: SPECIAL PROCEDURES ARE REQUIRED WHEN REMOVING OR REPLACING ALTERNATOR TERMINAL HARDWARE. IT IS IMPERATIVE THAT KAES SERVICE INFORMATION LETTER A-125 REV. A OR LATER BE OBSERVED IN CONJUNCTION WITH THESE INSTRUCTIONS. FAILURE TO DO SO MAY RESULT IN DAMAGE TO THE ALTERNATOR ASSEMBLY. PUBLICATIONS MAY BE DOWNLOADED OR PRINTED FROM THE HET WEBSITE. SEE TECHNICAL SUPPORT INFORMATION. Inspect Aux Terminal for Chafing & Arcing Damage Figure 1 6. If no action was required per step 5 and P/N old style cover was identified per step 2, the cover must be replaced. Remove (B) terminal top cupped nut, washer, and aircraft power wire, then loosen the bottom cupped nut. Remove the three retaining screws P/N and lock washers P/N 12X-0195 and discard hardware and old style cover. (See Fig. 2) Obtain HET Cover Kit P/N containing the cover, screws, and washers, necessary to comply with this SB. Page 2 of 4 Hartzell Engine Technologies SIL A-138 New

4 PROCEDURE: (Cont d) 7. After removing old cover but prior to installing the new, remove both cupped nuts and metal washer from the Aux terminal. Install one P/N ALE-0050* fiber washer on top of the existing fiber washer. Re-install metal washer and bottom nut, torque to in-lbs. (see Figure 2) Figure 2 New Cover Installation NOTE: The new style cover (HET P/N 40857*) may be identified by a lip area around the base of the cover and by the thicker cover material. See Figure Install the new style cover P/N 40857*. Be sure that the cover does not chafe or contact any of the terminals or wiring. Install the three new retaining screws HET P/N * and lock washers HET P/N 12X-0195* and torque each to in-lbs. Tighten the battery (B) terminal bottom cupped nut and torque to in-lbs. New Cover P/N Identification of New Style Cover Lip at Base & Thicker Material Figure 3 9. If the alternator was removed from the engine to accomplish the cover replacement, re-install in accordance with instructions contained in the applicable engine service instructions and/or the aircraft maintenance manual. 10. Reconnect power wire to B terminal, install washer, and tighten top cupped nut in-lbs, while holding the bottom cupped nut with a thin wrench to avoid turning the bottom nut. Re-install Aux wire (if applicable) and top cupped nut. Torque top nut to in-lbs. Hold the bottom cupped nut with a thin wrench to avoid turning the bottom nut. See Figure Check all mechanical connections per the engine or aircraft manufacturer s torque specification. 12. Reconnect electrical power and perform an engine run to check the security of installation and to check performance of the alternator. If good, proceed to the Return to Service. * Part of HET Cover Kit P/N New Hartzell Engine Technologies SIL A-138 Page 3 of 4

5 RETURN TO SERVICE: 1. Utilizing the applicable aircraft and engine manufacturer s maintenance manuals, install any portion of the aircraft removed to gain access. 2. Upon successful completion of this service information letter by inspection and/or replacement of the diode cover or alternator, make an appropriate log book entry of compliance. It is important to fill out and submit the Attachment A form on the last page of the SIL, please see the Warranty Statement. MATERIAL REQUIRED: One (1) each, Kit, Cover, HET P/N (Kit contains cover P/N 40857, three (3) each retaining screws P/N , three (3) each lock washers P/N 12X-0195, and one (1) each fiber washer, P/N ALE-0050.) If required due to damage at Aux terminal, one (1) each, new or rebuilt ES alternator. AVAILABILITY OF PARTS: Parts to support this service information letter must be obtained from an authorized Hartzell Engine Technologies or Teledyne Continental Motors (TCM) Distributor as may be applicable. Any supplementary part such as the alternator belt, must be obtained from the applicable engine or airframe manufacturer. WARRANTY STATEMENT: The sole warranty for the actions within this service information letter are contained in the HET Limited Warranty Policy issued with the purchase of each new or rebuilt alternator (see terms and conditions therein). Issuance of this service information letter in no way constitutes an implied or expressed warranty of any kind. HET reserves the right to repair, rebuild, or replace at it s sole option, normal warranty procedures apply. Contact the HET warranty administrator at (334) prior to returning any alternator affected by this service information letter. Other warranty may apply per the terms and conditions in the aircraft or engine manufacturer s Limited Warranty Policy, contact the appropriate party to enquire. This publication does not imply or state any responsibility for the workmanship of any person or entity performing work or maintenance on the alternator or electrical system. CONTACT INFORMATION: If you have any questions concerning this service information letter, please contact Hartzell Engine Technologies at Or write: Hartzell Engine Technologies, LLC 2900 Selma Highway Montgomery, AL 36108, USA If communication is desired, go to our website: and select contact and follow the instructions. Page 4 of 4 Hartzell Engine Technologies SIL A-138 New

6 ATTACHMENT A PPCR Publication Product Condition Report Customer information: (Completed by End User) Name: Date of report: Tel: Company Name: Address: Aircraft Mfg/: Time in Service: Model: S/N: Engine (as may be applicable) Product or Component Information: (Completed by End User) Nomenclature: ALTERNATOR (ES ) Part Number: Serial Number: Batch/Date Code: Part Time in Service: (Labor time) Remove: Replace: Compliance Information: (Completed by Repair Facility) Compliance with SIL-A-138: YES Cover Cracked: NO YES Amount Extensive Minor Write comments below: Warranty Eligibility: To be eligible for any warranty participation, this form must be completed entirely and included with the warranty claim form. Take this form along with proof of compliance with this service release to any Hartzell Engine Technologies, LLC distributor to apply for warranty. NO reimbursement will be made without completing this form. For further information contact Hartzell Engine Technologies, LLC at: 2900 Selma Highway, Montgomery, AL, USA or FAX to HET Customer Service, The complete service information letter is available to you online via our website at