CFM HPTACC Valve Fuel Leakage
**** Hidden Message ***** HPTACC<BR>Valve Fuel<BR>Leakage<BR>2<BR>CFM56 Operators Conference – May 21 - 22, 2002 CFM Proprietary Data Unauthorized Disclosure Prohibited<BR>• Background<BR>- HPTACC valve overboard leakage<BR>- Occurring 3000 to 5000 TSN<BR>- Exceeds AMM limits<BR>• Findings<BR>- Piston rod surface finish anomaly.....orange peel condition<BR>- Complies with surface finish requirements<BR>- Excessive wear of Teflon slipper seal<BR>- 165 valves, 21 Airlines affected - S/N 2102 thru 2361<BR>CFM56-5B - HPTACC Valve Fuel Leakage<BR>Slipper Seal Orange peel condition<BR>3<BR>CFM56 Operators Conference – May 21 - 22, 2002 CFM Proprietary Data Unauthorized Disclosure Prohibited<BR>• Corrective Actions<BR>- Process changed to Chrome Plate<BR>- Grind prior to plating, establish surface finish<BR>- Chrome plate<BR>- Finish grind after plating to final dimension and finish<BR>- Assures consistent surface finish<BR>.<BR>• Field Plan<BR>- Recommend removal of suspect units prior to 5000 TSN<BR>- Whittaker Service Letter SL2002-02 issued Mar 20, 2002<BR>CFM56-5B - HPTACC Valve Fuel Leakage<BR>Whittaker Will Replace Pistons at No Charge :victory: :victory: CFM HPTACC Valve Fuel Leakage
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