GEK 116862 Inspection and Maintenance Instructions for 7FA.05 Gas Only and Dual Fuel Gas Turbines
Inspection What to Inspect for
Inspection
Frequency and
Turbine Status
Document
or Section
Reference
Bound or Rubbing Shaft M – O
Excessive Vibration, Loose Shaft Fit M – O
Oil Leakage at Casing Joint M – O
Dirty Internal Seal Oil Line and Fittings A – S
Fuel Oil Heater
XII.B.
Defective Circuitry A – O
Defective Heating Element A – O
Fuel Forwarding Piping Excessive Vibration M – O XII.
Leaking Pipes and Joints M – O
Broken Supports M – O
FUEL OIL SYSTEM (Dual Fuel Units Only)
Stop Valve XIII. B.
External Leaks D – O
Rough Operation SA – O
Sluggish Movement Open/Close SA – O
Trip Action with Loss of Supply
Pressure SA – S
Main Fuel Pump XIII. C.
Leaking Shaft Seal M – O
Flow Divider XIII. D.
Leakage, Abnormal Noise M – O
Discharge Pressure Differential D – O
Speed Pickups Secure A – O
Corrosion/Binding A – S
Fuel Nozzle Selector Valve XIII. E.
Improper Stem Operation M – O
Leakage at Connections M – O
False Start Drain Valve(s) XIII. F.
Incorrect Sequencing During Startup
and Shutdown A – O
Improper Operation of Valve Actuator A – O
Air and Oil Leaks D – O
Worn Diaphragm in Valve Actuator A – S
SPEEDTRONIC
*
Control Loop
Flow Unstable, Hot Starts, Over
temperature D – O
Control
Specification –
Operating
Instructions
and Sequences
and Control
Specification –
Control
System
Adjustments
Calibration FSR Versus Fuel Flow
LVDTs A – S
Electronic Trip Actuation SA – S
Check for Proper Null Bias SA – S
LVDT Feedback at Firing Speed Versus
FSR
A – O
ATOMIZING AIR SYSTEM (Dual Fuel Units Only)
Starting Atomizing Air
Compressor
XIV. B.
Seal Leaking A – S
12
© General Electric Company, 2011. GE Proprietary Information. All Rights Reserved.
To Next Page