Maintenance Caused IFSD Presented by Bill Benham Feb. 2x, 2006 CFM International Proprietary Information: The information in this document is CFM Proprietary Information and is disclosed in confidence. It is the property of CFM International and its parent companies, General Electric Company and Snecma Moteurs, and shall not be used, disclosed to others or reproduced without the express written consent of CFM. If consent is given for reproduction in whole or in part, this notice shall appear in any such reproduction in whole or in part. The information contained in this document may also be controlled by the U.S. and French export control laws. Unauthorized export or re-export is prohibited. Review of Maintenance Related IFSD CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page ALL CFM56-7 IFSD Causes Since EIS 0 5 10 15 20 25 30 Number of IFSD Maintenance # 4 Bearing AGB HMU #3 Bearing Starter HPT Blade A/C Systems TEO Sensor Aft Sump Leak EEC FOD Lightning Strike Altenator Oil Filter Bypass Fuel Imbalance PS3 Line RDS TGB #3 A/O Seal F/O Hx Spinning FF Damaged Fuel Line MFP #2 Bearing Oil Line No 1 Brg Oil Temp Indication PMA gasket T25 Sensor VSV Act Cause 1998-2004 2005 SEE NEXT SLIDE CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page CFM56-7 Maintenance Caused IFSD Since EIS 0 1 2 3 4 5 6 Oil Leaks Hand Cranking Pad Cover Fuel Leaks Spinning Fuel Filter MCD Installation No BSI After Hot Start Loose CTAI Valve Damage to VSV ring OFB - Prev Starter Failure Oil Not Serviced Improper T/S 1998-2004 2005 CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page Top CFM56-7 Maintenance IFSD Drivers • Oil Leaks (6) – Four Under Torqued Connections – Two Following IDG Replacement • Hand Cranking Pad Cover (5) – Loose or Not Installed HCP Cover Following BSI • Fuel Leaks (4) – Two Gasket Damage – On Over Torque – One Under Torque • Spinning Fuel Filter (4) – All Had Pre CFM56-7 SB 73-0078 Filters Installed • MCD Installation (3) – One DMS – Two MCD – One MCD Under Investigation CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page CFM Fleet Highlites Article (FHA) CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page December 2001 Fleet Highlites Article CFM56-7B -- EEC Alternate Mode Light Versus Engine Control Light (01-12-7321-04) CFM has received event reports suggesting that there may be some confusion over the difference between the cockpit ENGINE CONTROL light and the EEC Alternate Mode (EECALTN) light. This article is intended to clarify the distinction between these two lights, both in terms of dispatch ramifications and the conditions under which these lights can illuminate. It is hoped that a better understanding of these distinctions will improve the troubleshooting, and reporting, of events related to the illumination of these lights. The figure below describes the dispatch limitations of the ENGINE CONTROL light and the EEC-ALTN light. Both lights are located in the flight compartment on the P5 Aft Overhead Panel. When ENGINE CONTROL light 1 or 2 is illuminated, the airplane is in a no-dispatch configuration and there is no MMEL relief for this condition. The ENGINE CONTROL light can be illuminated only when the airplane is on the ground. When EEC-ALTN light 1 or 2 is illuminated, both EECs must be placed into the alternate mode. Refer to the page 2-73-11.0 of the 737 Dispatch Deviations Procedures Guide (DDPG), dated June 1, 2001 for relief from the EEC-ALTN light. The EEC-ALTN light can be illuminated when the airplane is in flight or on the ground. CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page December 2001 Fleet Highlites Article - Figure Next-Generation 737 P5 Aft Overhead Panel Engine-Control Light (Engine 1) Engine Control Light (Engine 2) EEC-ALTN Light (Engine 2) EEC-ALTN Light (Engine 1) When either engine-control light is illuminated the airplane is in a no-dispatch condition. (No MMEL relief) Anytime either EEC-ALTN light is illuminated, both EECs must be placed into alternate mode. (MMEL relief 2-73-11.0 - 01-JUN-01) ENGINE CONTROL ENGINE CONTROL ON ON ALTN ALTN REVERSER REVERSER 1 2 ENGINE REVERSER ENGINE CONTROL 1 ENGINE EEC REVERSER ENGINE CONTROL 2 ALTN ON ALTN ON (FRONT VIEW) CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page Dispatch Deviations Procedures Guide – Section 2 CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page Received January 30, 2006 DESCRIPTION: The datum airplane, on flight XYZ from Point-A performed a Return To Ramp (RTR) on 20 January 2006 due to the # 2 engine control light illuminated. Maintenance message 75-30832, T3 out of range. The airplane was on the runway center line at the time of the fault. Troubleshooting was carried out in accordance with ref /B/. The T3 sensor plug was cleaned and reset. The fault remained intermittent. The airplane was released for further service per MEL. Final corrective action was replacement of the ref /A/ T3 sensor. Subsequent workshop testing of ref /A/ has revealed no fault with the sensor. The airplane continues to operate without further fault. There Is No MEL Relief For The Engine Control Light CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page FIM/AMM CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page Example Over Temp During Start (AMM 71-00-00) Possible Change: (c) If Steps 3 (a) and 3(b) have been completed without negative findings then A maximum… CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page Maintenance Communication Process • Leverage Best Practices From the CF34 Program • Use The Web Based Critical Issue Tool – The initial trial will be presented to AAL, COA, DAL, SWA – Contents: • IFSD Chart (EIS) • Maintenance IFSD Chart • One Page Reminder of Critical Maintenance Practice – Re-publishing of an old FHA – Reminder to install HCP following a BSI – Pictures or Diagrams • Details of the Process are Still Being Worked – This will not be a one-time event, but an on going process • Will be Worked Through the ATPM and FSE for Each Airline • Be Available to All CFM FSE (INC zone) in March 2006 CFM PROPRIETARY INFORMATION – Subject the Restrictions on the Cover or First Page作者: junbok 时间: 2011-5-7 23:35:12
