Keep this list of acronyms nearby during WTUI’s 2021 virtual conference. You’ll find that most speakers talk in “shorthand,” using acronyms freely. If you’re not up to snuff on your aero lingo you can get lost in a hurry and possibly miss key points. The “cheat sheet” that follows can help you remain focused.
| AGB—Accessory gearbox (also called the transfer gearbox)
AVR—Automatic voltage regulator CCM—Condition maintenance manual CCR—Customized customer repair CDP—Compressor discharge port CFF—Compressor front frame COD—Commercial operating date CPLM—Critical-parts life management CRF—Compressor rear frame CWC—Customer web center (GE) DEL—Deleted part DLE—Dry, low emissions combustor DOD—Domestic object damage EM—Engine manual FFA—Front frame assembly FOD—Foreign object damage FPI—Fluorescent penetrant inspection FSNL—Full speed, no load GG—Gas generator (consists of the compressor and hot sections only) GT—Gas turbine (consists of the gas generator pieces with the power turbine attached) GTA—Gas-turbine assembly HCF—High-cycle fatigue HGP—Hot gas path HPC—High-pressure compressor HPCR—High-pressure compressor rotor HPCS—High-pressure compressor stator HPT—High-pressure turbine HPTN—High-pressure turbine nozzle HPTR—High-pressure turbine rotor IGB—Inlet gearbox IGV—Inlet guide vane IPT—Intermediate-pressure turbine (LMS100) IRM—Industrial repair manual LM—Land and marine LCF—Low-cycle fatigue LO—Lube oil |
LPC—Low-pressure compressor (not on LM2500; just LM5000 and LM6000)
LPCR—Low-pressure compressor rotor LPCS—Low-pressure compressor stator LPT—Low-pressure turbine LPTR—Low-pressure turbine rotor LPTS—Low-pressure turbine stator MCD—Magnetic chip detector MOH—Major overhaul NGV—Nozzle guide vane OEM—Original equipment manufacturer PN—Part number PT—Power turbine (turns a generator, pump, compressor, propeller, etc) PtAl—Platinum aluminide RCA—Root cause analysis RDS—Radial drive shaft RFQ—Request for quote RPL—Replaced part SAC—Single annular combustor SB—Service bulletin SL—Service letter SUP—Superseded part STIG—Steam-injected gas turbine TA—Technical advisor TAT—Turnaround time TAN—Total acid number (lube oil) TBC—Thermal barrier coating TGB—Transfer gearbox (also called the accessory gearbox) TMF—Turbine mid frame and thermal mechanical fatigue TRF—Turbine rear frame VBV—Variable bleed valve (not on LM2500; just LM5000 and LM6000) VBVD—Variable bypass valve doors VIGV—Variable inlet guide vanes VSV—Variable stator vane VSVA—Variable stator-vane actuator |
