1. Planning Information A. Effectivity (1) Hartzell Engine Technologies LLC (HET), formerly Kelly Aerospace Energy Systems, LLC (KAES), direct drive starter motor, models: ES646238-2, ES646238-3, ES646275-1, MCL-6501, and MHJ-4003. All serial numbers. The affected starters are FAA PMA approved. CAUTION: DO NOT USE OBSOLETE OR OUTDATED INFORMATION. PERFORM ALL INSPECTIONS OR WORK IN ACCORDANCE WITH THE MOST RECENT REVISION OF THE OE-A2 OVERHAUL & MAINTENANCE MANUAL (MM) AND THIS SERVICE INFORMATION LETTER (SIL). INFORMATION CONTAINED IN THE MM AND THE SIL MAY BE SIGNIFICANTLY CHANGED FROM EARLIER REVISIONS. USE OF OBSOLETE INFORMATION MAY CREATE AN UNSAFE CONDITION THAT MAY RESULT IN DEATH, SERIOUS BODILY INJURY, AND/OR SUBSTANTIAL PROPERTY DAMAGE. REFER TO THE SIL AND MM INDEX FOR THE MOST RECENT REVISION LEVEL. B. Concurrent Requirements (1) None C. Reason (1) It has come to the attention of HET that only basic information regarding direct drive starter motor shaft end play is contained in the current OE-A2 Alternator and Starter Overhaul and Maintenance manual. (2) A binding or free condition may lead to a short service life or an inoperative starter when mounted to a starter drive adapter. (3) Regulatory action is not expected. D. Description (1) This Service Information Letter is being issued to provide service information to supplement the current OE-A2 Alternator and Starter Overhaul and Maintenance Manual until a revision can be made to add the technical information herein. (2) The conditions must be checked per this SIL prior to the installation of a starter. 2011 - Hartzell Engine Technologies. - All rights reserved Page 1 of 8
E. Compliance (1) Any time a new, rebuilt, or overhauled direct drive starter motor is installed on a starter drive adapter for an aircraft engine per the effectivity 1.A.(1). (2) Compliance of this Service Information Letter is recommended. F. Approval (1) FAA approval has been obtained on technical data in this publication that affects type design. G. Manpower (1) No additional man hours are required for this pre-installation instruction. H. Weight and Balance (1) No change. I. Electrical Load Data (1) No change. J. References (1) Hartzell Engine Technologies OE-A2 Overhaul & Maintenance Manual. (2) Aircraft Maintenance Manual. (3) Teledyne Continental Motors Maintenance Manual. K. Other Publications Affected (1) Hartzell Engine Technologies OE-A2 Overhaul Manual. 2. Material Information A. None. 2011 - Hartzell Engine Technologies. - All rights reserved Page 2 of 8
3. Accomplishment Instructions A. Observe Figure 1 for the starter drive shaft specifications and torque. Typical Starter for Gear Drive System Figure 1 - Starter Drive Shaft Specifications B. Drive shaft at rest torque check (1) Check the drive shaft at rest torque first, as any discrepancy found will require repair or overhaul of the starter. (2) Rotate the the starter drive shaft by hand several turns clockwise (CW) as viewed from the drive end. (3) Use a suitable tool with a properly calibrated inch-pound torque wrench to check torque. A tool can be made using an appropriately sized clevis bolt with a nut tightened securely on the thread end. (4) Rotate the inch-pound torque wrench clockwise (CW) through 360 or more. The torque indication must be 5 inch pounds or less. The starter must be repaired or overhauled if rotational torque is higher. C. Drive shaft position check (1) Check the position of the drive shaft with respect to the housing for min and max tolerance using a dial indicator. Any style of dial indicator set up is permissible provided that the indicator reads to a minimum of.001 inch resolution. 2011 - Hartzell Engine Technologies. - All rights reserved Page 3 of 8
(2) The set up requires the starter be held vertically with the drive shaft up and then vertically with the drive shaft down. (b) Placing the starter vertical with the drive shaft up allows a check of the length of the drive shaft from the starter mounting flange. Placing the starter vertical with the drive shaft down allows a check of the drive shaft end play by measurement and calculation. (3) Check the starter drive shaft minimum length by setting the starter on blocks vertically with the drive shaft up. (b) (b) Size the blocks of equal measure and width so the starter is stable. Place the bottom side of the mounting flange (flange with holes) on to tall blocks. Tap gently on the drive shaft with a plastic mallet. (4) Place the dial indicator on the flange surface which will be attached to the engine starter drive adapter, zero the indicator. See Fig. 2. Figure 2 - Set Dial at Zero on Flange 2011 - Hartzell Engine Technologies. - All rights reserved Page 4 of 8
(5) Place the dial indicator on the apex of the drive shaft and record measurement. See Fig. 3. The measurement recorded in step 3.C.(5) must fall in between.580 inch and.630 inch inclusive of the starter end play allowance. Figure 3 - Record Number at Apex of Shaft 2011 - Hartzell Engine Technologies. - All rights reserved Page 5 of 8
D. Drive shaft maximum length check (1) Check the starter drive shaft maximum length by setting the starter vertically with the drive shaft down. (b) (c) (d) Rotate the drive shaft by hand through one turn. Size the blocks of equal measure and width so the starter is stable. Place the mounting flange (flange with holes facing starter drive) on the blocks. Tap gently on the drive shaft rear cover with a plastic mallet. (2) Place the dial indicator on the flange surface which will be attached to the drive adapter, zero the indicator. See Fig. 4. Figure 4 - Set Dial at Zero on Flange 2011 - Hartzell Engine Technologies. - All rights reserved Page 6 of 8
(3) Place the dial indicator on the apex of the drive shaft and record measurement. See Fig. 5. The measurement recorded in step 3.D.(6) must fall in between.580 inch and.630 inch which is inclusive of the starter end play allowance. Figure 5 - Record Number at Top of Shaft E. End play determination (1) Determine if the starter falls into the allowable end play measurement by making a calculation. This is done by taking the maximum measurement found in step 3.D.(6) and subtracting the minimum measurement found in step 3.C.(5). For example, if the shaft maximum measurement from step 3.D.(6) was.610 inch and the minimum measurement from step 3.C.(5) was.585 inch then subtracting.585 inch from the.610 inch will result in.025 inch end play. This is acceptable as the allowable end play range is.005 to.050 inch. (2) If the starter drive shaft end play is out of allowable range of.005 to.050 inch or the drive shaft length is beyond the min.580 or max.630 inch, repair or overhaul of the starter is recommended. Do not install starters outside of these limits on any starter drive or application. F. This inspection check does not require a log book entry unless the starter has been replaced, repaired, or overhauled. 2011 - Hartzell Engine Technologies. - All rights reserved Page 7 of 8
4. Warranty Statement A. 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 starter (see terms and conditions therein). B. Issuance of this service information letter in no way constitutes an implied or expressed warranty of any kind. C. This publication does not imply or state any responsibility for the workmanship of any person or entity performing work or maintenance on the starter or aircraft electrical system. 5. Contact Information A. All communications regarding this service information letter, must be placed either through Hartzell Engine Technologies Technical Support at (888) 461-6077 or via Fax (334) 386-5450. For the Warranty department, (334) 386-5441. B. Written communications must be placed through Hartzell Engine Technologies Technical Support,, Montgomery, AL 36108, USA. C. If E-mail communication is desired, go to our website: http://www.hartzellenginetech.com and select "contact" and follow the instructions. 2011 - Hartzell Engine Technologies. - All rights reserved Page 8 of 8