GEK 116862 Inspection and Maintenance Instructions for 7FA.05 Gas Only and Dual Fuel Gas Turbines
I. AUXILIARY AND CONTROLS SYSTEMS MAINTENANCE - GENERAL
The maintenance procedures recommended in this section apply to a typical power plant installation.
This manual is subdivided into two subsections: the Periodic Inspection Schedule followed by Inspection
and Maintenance Procedures. Although the subjects in each follow the same general order, not every item
listed in the Inspection Schedule is mentioned in the Maintenance Procedures. Only those items which
require special care, or which are not covered by manufacturer’s instructions, are covered in the text
portion.
Standard maintenance items, such as gauges, switches, valves, filters, etc., have been grouped under one
heading in each subsection. Following this, the items have been grouped by system and major equipment
categories. Note that not all devices and components are readily accessible. Consult the recommended
Safe Site Work Practices in addition to observing all posted signs and information provided by the
original equipment manufacturer and/or GE prior to access.
In the Periodic Inspection Schedule, the “Inspect” column lists all the systems, components and devices
on the gas turbine and generator that require inspection. In the “What to Inspect For” column, particular
points of each item of inspection are listed as possible defective conditions that should be looked for and
corrected.
For temperature and pressure settings, flow rates, calibration data, etc., plus detailed information on the
inspection and maintenance of any device listed herein, the reader should also refer to the following
documents in the Operation and Maintenance Manual:
1. Schematic Piping Diagrams
2. Device Summary, MLI 0414
3. Connection List, MLI 4063
4. Control Specifications, MLI A010
5. Equipment Publications
6. GE Product Safety Recommended Best Practices - Safe Site Work Practices
The “Inspection Frequencies and Turbine Status” column specifies, by means of abbreviations, how often
a device or assembly should be inspected and whether or not the turbine can be operating at the time of
inspection. The left-hand letter(s) designate the frequency and the right specifies the turbine status.
Following is a list of abbreviations used:
D: Daily Inspection
W: Weekly Inspection
M: Monthly Inspection
Q: Quarterly Inspection
SA: Semiannual Inspection
CI: Combustion Inspection
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