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P&W Engines Summer 2008
- JT15D-5 and JT15D-5R New Compressor Air To Fuel Control Unit Delivery Tube
- PW535B Grounding Stud Installation
- PW500 Series On-Wing Low Utilization Inspection Program
- JT15D-1,-1A,-1B,-4,-4B,-4C,-4D With First Stage Low Pressure Turbine Disk PN 3022212
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JT15D-5 and JT15D-5R New Compressor Air To Fuel Control Unit Delivery Tube
Pratt & Whitney recently introduced SB A7611 to modify the controlling air (P3) delivery path to the Hydromechanical Unit (HMU). With the old configuration, there might be a chance of moisture in the P3 air entering the HMU and affecting its operation when exposed to the freezing temperatures at altitude. The new configuration provides warmer and dryer P3 air by directing moisture away from the HMU through an overboard drain hole. Pratt & Whitney has recommended this Service Bulletin be accomplished within 200 hours. A Commercial Support Program has been made available to those operators who wish to receive parts and labor compensation.
PW535B Grounding Stud Installation
Pratt & Whitney has just released SB 30360 pertaining to PW535B engines with serial numbers PCE-DE0065 and lower. A one-time inspection of sealant around the grounding terminal studs of the intermediate case is recommended within the next 300 hours or six months, whichever comes first. The sealant’s purpose is to protect and prevent corrosion around the mounting boss uncoated surfaces. Commercial Support Program 1003593 has been issued to support the necessary labor involved.
If you have questions about this, or any issue in this publication, please contact me at 269.969.8486.
PW500 Series On-Wing Low Utilization Inspection Program
In Summer ‘07 Duncan Intelligence, we discussed the Low Utilization Inspection (LUI). At that time, Pratt & Whitney said they were going to revise the maintenance manual (MM) allowing the LUI to be accomplished per the MM in the field instead of sending the engine to an overhaul facility. The inspection is now in the MM under scheduled maintenance chapter 05-20-00 and can be accomplished in the field. As before, the inspection is due 10 years after engine entry into service and every two years after that.
Please feel free to contact me for guidance on this inspection at 269.969.8486.
JT15D-1,-1A,-1B,-4,-4B,-4C,-4D With First Stage Low Pressure Turbine Disk PN 3022212
Pratt & Whitney has released SB 7620 indicating that there has been eight In-Flight Shut Down events related to the first stage Low Pressure Turbine Disk PN 3022212 fracture. Disks with heat codes PLYDY and PLYFZ are suspected to be the source of the problem and can be replaced with disks with a different heat code. Sixty-eight disks are affected and identified by serial number in table one of the Service Bulletin. Commercial Support Program Number 1003407 has been created to provide some financial support for those with affected disks.
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