A reliable thermal power plant runs on a frequency-based PM plan organized by asset — daily, weekly, monthly, and annual cycles broken out for every major rotating, pressure-bearing, and electrical asset on the site. The checklist below is the working reference: six asset classes, four frequencies, more than a hundred and forty discrete PM tasks, and the structure most CMMS programs need to absorb in a usable format. An iFactory CMMS module can ingest this entire matrix in a single import, route tasks to the right craft per shift, and track compliance — but the checklist works equally well as a paper-and-clipboard plan if that is the cadence the plant runs today.
iFactory · Power Plant Maintenance Reliability
Power Plant Preventive Maintenance Checklist by Asset
Turbines, boilers, generators, fans, pumps, and balance of plant — daily, weekly, monthly, and annual cycles broken down per asset class. Working reference for the maintenance team, drop-in import for the CMMS.
D/W/M/Y
full frequency coverage
Why a Frequency × Asset PM Plan Is the Plant's Operating Manual
The plants that hit high availability targets are not the ones with the most expensive equipment — they are the ones whose PM program is consistent, frequency-disciplined, and organized by asset class. Planned maintenance compliance averages 61% across thermal power plants industry-wide; the other 39% of maintenance hours are reactive, fixing something that already failed. The plants that flip that ratio do it with a working checklist their crews actually use — short enough to be practical, deep enough to catch the signatures, and split by frequency so that what gets done daily is genuinely doable on every shift.
The Master PM Matrix at a Glance
The matrix below is the one-page overview of the entire program. Six asset classes down, four frequency cycles across. Each cell shows the count of discrete tasks at that intersection — the deeper the colour, the more work the cycle carries. Use it as the cover sheet for the rest of this page; every cell expands into its own checklist below.
Asset Class
Daily
Weekly
Monthly
Annual
Steam Turbine PM Checklist
The turbine is the highest-criticality rotating asset on the site, with the largest planned-outage scope and the longest lead time on consumables. Daily and weekly cadences focus on protective-instrument verification and oil-system health. Monthly tasks catch the slow signatures — alignment drift, oil quality, governor performance. The annual list is essentially the outage scope.
Steam Turbine
High-speed rotating asset · largest planned-outage scope
Daily
Bearing vibration on all journal + thrust bearings
Lube oil temperature and pressure logged
Steam inlet conditions (P/T) vs design envelope
Visual sweep for steam, oil, condensate leaks
Exhaust hood temperature within band
Weekly
Bearing housing temperature trend review
Lube oil filter differential pressure check
Online governor response verification
Drain trap operation, each stage drain
Lube oil reservoir level and condition
Monthly
Turbine-generator alignment indication (cold and hot)
Lube oil sample: particle count, viscosity, water
Steam strainer inspection (main + auxiliary)
Overspeed trip test (where outage permits)
Crossover and crossunder expansion joint check
Thrust bearing wear pad indication
Annual
Casing inspection and bolt torque check
Blade visual + dye penetrant (HP, IP, LP)
Bearing clearance and journal measurement
Governor valve overhaul (all valves)
Reduction gear inspection (if geared)
Lube oil system flushing + filter change
Coupling inspection, alignment, grease
Trip and throttle valve teardown
Boiler PM Checklist
The boiler is the highest-task-density asset on the matrix, and it carries the highest forced-outage exposure (boiler tube leaks alone drive more than half of all unplanned thermal plant shutdowns). Daily and weekly cycles centre on combustion stability and water-side protection; monthly tasks bring UT and chemistry into the routine; annual scope is the outage envelope from drum to economizer.
Boiler
Highest task-density asset · largest forced-outage exposure
Daily
Drum level alarm and trip verification
Burner flame stability check, each burner
Fuel pressure and supply confirmation
Soot blower sequence operation
ID/FD fan motor amp and temp readings
Water chemistry sample, continuous loop
Weekly
Safety valve seat tightness indication
Boiler feedwater pump alignment indication
Soot blower lance and nozzle inspection
Air preheater rotor speed + differential
Burner tip cleaning rotation (1 of N per week)
Furnace draft trend review
Monthly
Tube wall thickness (UT) at known wear zones
Burner overhaul rotation (1 of N per month)
Air-fuel ratio calibration check
Drum vent and relief test
Combustion tuning verification
Ash and slag deposit photo audit
Stack opacity reference check
Bottom ash hopper inspection
Annual
Hydrostatic test (where required by code)
Internal inspection: drum, headers, tubes
Refractory inspection and repair
Safety valve full test and recertification
Air preheater wash and element inspection
Soot blower comprehensive teardown
Burner overhaul, all burners
Tube replacement per UT findings
Drum and header NDE per inspection plan
Economizer tube inspection
Want this matrix imported into your CMMS with criticality scores attached to each task? Talk to a reliability specialist and we'll scope the data migration.
Generator + Excitation PM Checklist
The generator is the lowest-touch high-criticality asset on a thermal plant — most of its PM is condition-monitoring and electrical testing rather than mechanical work. Daily and weekly tasks track winding temperatures, cooling, and hydrogen system health (for gas-cooled units); monthly cycles include partial discharge and AVR checks; annual scope brings the unit offline for insulation and rotor inspection.
Generator + Excitation
Condition-monitoring intensive · low-touch high-criticality asset
Daily
Stator winding temperature, all RTDs
Bearing vibration and temperature readings
Hydrogen pressure and purity (gas-cooled units)
Excitation current and voltage log
Cooling water flow and differential pressure
Weekly
Brush gear inspection (where applicable)
Hydrogen leak survey of seal system
Stator coil cooling water chemistry
Insulation resistance trend review
Cooler outlet temperature trend
Monthly
Partial discharge measurement (online)
AVR response check
Hydrogen dryer dew-point measurement
Stator winding tan-delta indication
Brush bedding and slip ring inspection
Excitation switchgear thermographic scan
Annual
Insulation resistance + polarization index (offline)
Stator wedge tightness check
Rotor balance verification
Slip ring inspection and rebuild (brushed units)
Cooler tube cleaning and leak test
Excitation transformer thermal scan
Brush gear major overhaul
Hydrogen system pressure test
ID, FD, and Primary Air Fans PM Checklist
The fans are workhorses — high duty cycle, exposed to ash and erosion, and surprisingly often the cause of forced derates. The pattern below assumes a typical site with one ID fan, two FD fans, and one or two primary air fans. Vibration and bearing trends dominate the daily and weekly cadence; bearing changeouts and impeller inspections are the annual story.
ID, FD, and Primary Air Fans
High duty cycle · erosion-exposed · bearing-failure prone
Daily
Vibration on inboard and outboard bearings
Bearing temperature readings logged
Motor current trend per fan
Damper position verification
Weekly
Lubrication top-up per OEM schedule
Bearing housing seal integrity check
Coupling guard integrity
Inlet and outlet differential pressure log
Monthly
Vibration spectrum analysis
Belt drive tension and condition (belt-driven units)
Damper actuator travel and feedback
VFD inspection (variable speed fans)
Inlet guide vane operation check
Annual
Bearing replacement rotation, per OEM hours
Impeller inspection and balance
Fan housing erosion mapping
Damper overhaul
Motor inspection, megger, brushes, bearings
Coupling teardown and alignment
Foundation bolt torque check
Want this PM matrix scoped against your unit count, your fuel type, and your CMMS? Book a demo and we'll walk through the import path.
Pumps PM Checklist — Feedwater, Condensate, Cooling Water
Pumps are the highest-population asset class on the site — a typical thermal plant runs three to six boiler feedwater pumps, multiple condensate pumps, and a fleet of cooling water and auxiliary pumps. The checklist below is the per-pump template. The volume of work is in the daily and weekly columns; major teardowns rotate annually across the fleet so that one pump comes apart at a time.
Pumps — Feedwater, Condensate, Cooling
Highest-population asset class · per-pump template, annual rotation
Daily
Discharge and suction pressure log
Vibration check on inboard and outboard
Seal water flow and leak monitor
Bearing temperature readings
Motor current per pump
Weekly
Coupling guard and alignment indicator
Lubrication oil level and condition
Cooling water flow to bearings
Suction strainer differential pressure
Monthly
Vibration spectrum and envelope analysis
Performance curve verification: head vs flow
Bearing oil sample (large pumps)
Mechanical seal external inspection
Motor insulation resistance trend
Stuffing box gland adjustment
Annual
Pump teardown rotation (1 of N per year)
Wear ring clearance measurement
Mechanical seal replacement per condition
Impeller inspection and balance
Casing inspection: erosion, corrosion
Motor major service and bearing change
Alignment laser check and correction
Balance of Plant (BOP) PM Checklist
Balance of plant covers everything that supports the main process train without being part of it — switchyard, DC system, compressed air, fire protection, HVAC, demin water, cooling tower. Individually low-criticality; collectively responsible for a disproportionate share of nuisance trips and derates. The matrix below assumes the typical BOP scope at a coal-fired unit; gas-fired units add fewer ash-side items but the broad strokes are the same.
Balance of Plant
Auxiliary systems · collectively responsible for nuisance trips and derates
Daily
Switchyard sweep: oil leaks, abnormal sounds
DC system battery cell readings
Compressed air system pressure log
Fire detection system status check
HVAC system operational verification
Demineralized water tank levels
Weekly
Transformer cooling fan and pump check
Switchgear infrared scan rotation
Air compressor unloader operation
Cooling tower fan and gearbox check
HVAC air filter differential pressure
Monthly
Battery bank capacity test
Transformer oil sample (large units)
Switchgear breaker exercise rotation
Fire system functional test
Cooling tower fill inspection
Demin plant resin condition check
Compressed air quality test, dew point
Annual
Transformer oil DGA + Furan analysis
Switchgear thermography and insulation
Battery load bank test
Fire system flow and foam test
Cooling tower mechanical inspection
HVAC chiller teardown rotation
Demin plant resin replacement per cycle
Compressor overhaul rotation
Earthing system continuity test
Want this BOP matrix tuned to a gas-fired unit, or extended for a combined-cycle plant? Talk to a specialist and we'll customize it to your asset list.
Five Practices That Separate Reliable Plants from the Rest
A checklist on the wall is not a program. The plants that hit availability targets above 94% run five practices on top of the matrix that turn it from a reference into a system. The pattern is the same across every site that has done this well.
1
Track Compliance, Not Just Completion
The metric is "what percentage of scheduled PMs were completed on time," not "did we get to them eventually." 90%+ compliance is the threshold; anything less means the schedule is wrong or the staffing is wrong.
2
Let Criticality Drive Frequency
A-class assets earn the daily and weekly cadence. C-class assets earn monthly or annual. Treating every asset the same way over-services some and under-services others — and the under-serviced ones are usually what fails.
3
Pair Every PM with a Failure Mode
Every task on the matrix should map to a specific failure mode it prevents. The ones that don't are usually inherited tradition — easy to drop, easy to defend dropping, frees up the craft hours for tasks that earn their place.
4
Convert Findings to Work Orders
A PM that finds a problem and does not generate a corrective work order is wasted craft time. The CMMS workflow needs the path: PM task surfaces issue, CAR opens, work order generated, closure tracked.
5
Review the Program Quarterly
Kill the PMs that have not surfaced a finding in twelve months. Add PMs for the failure modes the program missed. The matrix is a living document, and the quarterly review is how it stays useful.
Frequently Asked Questions
How do you decide whether a task is weekly or monthly?
Two criteria: the rate at which the asset degrades, and the consequence of missing the early signature. Vibration trending earns daily or weekly because bearing failures move fast and the consequence is catastrophic. Oil sample analysis earns monthly because the degradation rate is slower and the trend is what matters. If a task could plausibly be moved one step less frequent without raising the risk of a forced outage, it usually should be — that's the lever that frees craft hours for higher-value work.
What is "Reliability-Centered Maintenance" and does it replace this checklist?
RCM is the methodology for deciding which PM tasks are worth doing in the first place. It starts from a failure-mode analysis of each asset and works backward to the PMs that prevent each mode. The checklist on this page is the output of an RCM-style review for a typical thermal plant — six asset classes, the common failure modes, the tasks that catch the signatures. RCM doesn't replace the checklist; it tells you which items on the checklist belong on yours.
How does this fit with a CMMS like iFactory or others?
The matrix on this page imports as 140-plus PM templates, each with frequency, criticality, craft skill, and estimated duration. The CMMS schedules them, routes them to the right craft per shift, tracks compliance, and surfaces findings as new work orders. The checklist is the content; the CMMS is the engine that runs it. Either one alone is half a program.
Is preventive maintenance still relevant with condition-based monitoring?
Yes — they work together rather than replacing each other. Condition-based monitoring catches the failures that develop on their own timeline (bearing wear, tube thinning, insulation degradation). Preventive maintenance catches the failures that come from neglect of the basics (filters not changed, lubrication missed, calibrations drifted). A plant running both gets the benefits of both; running one alone leaves the other set of failures uncovered.
How long does it take to refine the PM program to "good"?
Twelve to eighteen months of quarterly reviews, starting from a baseline matrix like this one. The first two reviews are pruning — killing PMs that have not surfaced anything. The next two are additions — adding PMs for failure modes the program missed during that cycle. By month eighteen the program reflects the actual failure-mode population on the site rather than the generic OEM recommendations it started with.
From checklist on the wall to program that runs the plant.
Import This PM Matrix Into Your CMMS in One Pass
Bring the asset list for one unit — the boiler, the turbine, or the entire BOP. We'll map this matrix to your specific assets with criticality tags, craft assignments, and estimated durations attached to each task. The result is 140-plus PM templates ready to schedule, with compliance tracked from day one and findings flowing straight into corrective work orders.
140+
PM templates ready to import
D/W/M/Y
full cycle coverage
90%+
compliance target, tracked
