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Su-25A Frogfoot Startup Checklist
FLIGHT2.23.0Checklist
Su-25A FrogfootDCS WORLD · Startup Checklist · 162 steps · 16 phases
PHS 1 - Pre-Flight Planning8 steps
| 01 | Mission BriefREVIEWEDNOTE: Review target type, attack geometry, ROE, and egress routes. Su-25A is a low-level CAS platform - plan attack runs and pop-up parameters. | |
| 02 | Weather BriefingREVIEWEDNOTE: Check target area and recovery airfield weather. Low cloud ceilings limit Su-25A attack profiles significantly. | |
| 03 | NOTAMs / AirspaceREVIEWED | |
| 04 | Fuel Planning - Bingo / JokerSETNOTE: Internal fuel 3,600 kg. Plan joker (RTB initiate) and bingo (minimum recovery) values. Add external tanks if range required. | |
| 05 | Stores / LoadoutVERIFIEDNOTE: Confirm weapons per mission: S-5/S-8/S-24 rockets, Kh-25/Kh-29 missiles, bombs, gun (250 rounds GSh-30-2). Check pylon limits. | |
| 06 | Attack PlanningPLANNEDNOTE: Determine attack run headings, safe escape maneuver, and break-off altitude. Plan minimum recovery altitude. | |
| 07 | Radio Frequencies / IFFSETNOTE: Note ATC, FAC (forward air controller), and emergency frequencies. Su-25A uses R-862 radio. | |
| 08 | Divert BasesIDENTIFIED |
PHS 2 - Electrical10 steps
| 01 | Ejection Seat Safety PinREMOVEDWARNING: Confirm ejection seat is armed - remove safety pin before flight. Pin in = seat will not fire. | |
| 02 | Seat AdjustmentADJUSTED | |
| 03 | HarnessFASTENED AND TIGHT | |
| 04 | Battery SwitchONNOTE: Main battery switch on left console to ON. Powers essential bus. | |
| 05 | DC Bus VoltageCHECK - 27 V NOMINAL | |
| 06 | Generator 1 SwitchON | |
| 07 | Generator 2 SwitchON | |
| 08 | AC Power PanelCHECK - INVERTERS ON | |
| 09 | Instrument LightsAS REQUIRED | |
| 10 | Warning / Caution PanelCHECK - IDENTIFY ANY FAULTS |
PHS 3 - INS / Navigation Alignment6 steps
| 01 | PNK Navigation System PowerONNOTE: Turn on the nav system (PNK-10 navigation complex). Requires time to align - initiate before engine start. | |
| 02 | Navigation Mode SelectorALIGNNOTE: Set to alignment mode. Do not move aircraft until alignment complete. | |
| 03 | INS AlignmentWAIT 3-5 MINCAUTION: Aircraft must remain stationary during alignment. Movement invalidates alignment. | |
| 04 | RSBN / ARC Navigation BeaconsSET HOME BASE FREQUENCY | |
| 05 | AltimeterSET QNH / AIRFIELD ELEVATION | |
| 06 | IFF SystemCODES SET |
PHS 4 - Engine Start20 steps
| 01 | CanopyCLOSED AND LOCKEDCAUTION: Ensure canopy is fully latched before engine start. | |
| 02 | ThrottlesIDLECAUTION: Confirm both throttle levers at idle stop before initiating start. | |
| 03 | Fuel Cock LeversOPEN (both)NOTE: Open fuel shutoff cocks to supply fuel to engines. | |
| 04 | Fire Warning SystemTEST - CHECK BOTH CHANNELS | |
| 05 | Right Engine Start SwitchSTARTNOTE: Press and hold start button for right engine. Starter engages. | |
| 06 | Right Engine N1 / RPMRISING - CONFIRM IGNITIONCAUTION: Monitor EGT during light-off. Hot start if EGT rises rapidly past 500 C before RPM reaches 33%. | |
| 07 | Right Engine EGT at Start< 500 C DURING LIGHT-OFFWARNING: If EGT exceeds 500 C before 33% RPM - fuel cock CLOSE immediately to prevent hot start damage. | |
| 08 | Right Engine RPM at 33%CHECK - EGT STABILIZING | |
| 09 | Right Engine ThrottleADVANCE TO 40% RPM - CHECK EGT < 440 C | |
| 10 | Right Engine Idle RPM~70% RPM STABLE | |
| 11 | Right Engine InstrumentsALL IN GREEN | |
| 12 | Left Engine Start SwitchSTART | |
| 13 | Left Engine N1 / RPMRISING - CONFIRM IGNITIONCAUTION: Same hot start monitoring applies for left engine. | |
| 14 | Left Engine EGT at Start< 500 C DURING LIGHT-OFFWARNING: If EGT exceeds 500 C before 33% RPM - fuel cock CLOSE immediately. | |
| 15 | Left Engine RPM at 33%CHECK - EGT STABILIZING | |
| 16 | Left Engine ThrottleADVANCE TO 40% RPM - CHECK EGT < 440 C | |
| 17 | Left Engine Idle RPM~70% RPM STABLE | |
| 18 | Left Engine InstrumentsALL IN GREEN | |
| 19 | Both Generators OnlineCONFIRMED | |
| 20 | Hydraulic PressureNORMAL - CHECK GAUGES |
PHS 5 - Post-Start / Avionics11 steps
| 01 | Navigation ModeNORMAL OPERATION (from ALIGN)NOTE: Switch navigation system from alignment to normal mode once alignment is complete. | |
| 02 | HUD (ASP-17BTs Sight)ON - BRIGHTNESS SETNOTE: The ASP-17BTs is the primary attack sight. Set brightness for ambient conditions. | |
| 03 | Optical Attack SightARMED AND SETNOTE: Set delivery mode (guns, rockets, bombs) as required by mission loadout. | |
| 04 | SPO-15 Radar Warning ReceiverONNOTE: RWR provides threat warning. Essential for low-level operations in defended airspace. | |
| 05 | Active Jamming Pod (if fitted)ON - STANDBY | |
| 06 | IFF TransponderON - CODES CONFIRMED | |
| 07 | R-862 RadioON - FREQUENCY SET | |
| 08 | Oxygen SystemON - FLOW CONFIRMEDNOTE: Check oxygen pressure and confirm flow indicator cycling. | |
| 09 | Pitot HeatONNOTE: Enable pitot heat to prevent airspeed indicator icing. | |
| 10 | Engine Anti-iceAS REQUIRED | |
| 11 | Weapon StationsVERIFY LOADS - MASTER ARM SAFECAUTION: Keep Master Arm SAFE on ground until arming area or runway. |
PHS 6 - Before Taxi10 steps
| 01 | INS Alignment StatusCOMPLETECAUTION: Do not taxi if alignment is not complete. Navigation will be degraded. | |
| 02 | Flight ControlsFULL TRAVEL - FREE AND CORRECTNOTE: Cycle stick and rudder through full deflection. Verify correct surface movement. | |
| 03 | Air BrakesRETRACTED | |
| 04 | FlapsTAKEOFF POSITION (CHECK)NOTE: Set flaps to takeoff position per mission weight. | |
| 05 | TrimSET FOR TAKEOFF (NEUTRAL) | |
| 06 | Engine ParametersBOTH IN LIMITS | |
| 07 | Hydraulic PressureNORMAL - BOTH SYSTEMS | |
| 08 | Fuel QuantityCONFIRMED AS BRIEFED | |
| 09 | Warning / Caution PanelCLEAR (or faults understood) | |
| 10 | Parking BrakeSET |
PHS 7 - Taxi6 steps
| 01 | Parking BrakeRELEASE | |
| 02 | ThrottlesADVANCE - INITIATE ROLL | |
| 03 | BrakesCHECK LEFT AND RIGHT | |
| 04 | Nosewheel SteeringACTIVENOTE: Su-25A uses differential braking and rudder for directional control. NWS engages at low speed. | |
| 05 | Taxi Speed< 30 KM/H ON RAMPNOTE: Use throttle carefully - response is slower than Western jets. | |
| 06 | Navigation LightsON (STEADY) |
PHS 8 - Before Takeoff11 steps
| 01 | Runway EntryCLEARED | |
| 02 | Flight ControlsFREE AND CORRECT | |
| 03 | FlapsTAKEOFF POSITION - SET AND CHECKED | |
| 04 | TrimNEUTRAL / TAKEOFF SETTING | |
| 05 | Engine ParametersBOTH ENGINES - RPM, EGT IN LIMITS | |
| 06 | Air BrakesRETRACTED | |
| 07 | SpeedbrakeIN | |
| 08 | IFFMASTER MODE ON - CODES CONFIRMED | |
| 09 | Warning / Caution PanelCLEARCAUTION: Resolve all active warnings before takeoff roll. | |
| 10 | Master ArmAS BRIEFED (SAFE until airborne unless required) | |
| 11 | Abort ProcedureREVIEWED - IDLE, AIR BRAKES, DRAG CHUTE, BRAKES |
PHS 9 - Takeoff8 steps
| 01 | Parking BrakeRELEASE | |
| 02 | ThrottlesADVANCE TO MILITARY POWER (100%)NOTE: Su-25A has no afterburner. Military power is maximum thrust. | |
| 03 | Engine Parameters at Full PowerCHECK SYMMETRICAL - RPM AND EGT MATCHED | |
| 04 | Nose Gear Relief Speed~160-180 KM/H - EASE FORWARD PRESSURENOTE: Ease front gear off ground at 160-180 km/h to reduce drag. | |
| 05 | Rotation Speed~240-260 KM/HNOTE: Rotate at 240-260 km/h at normal weight; up to 280 km/h fully loaded. | |
| 06 | Rotate7-10 DEGREES NOSE UPCAUTION: Do not over-rotate - risk of tail strike with heavy weapons loads. | |
| 07 | Positive Climb RateGEAR UPNOTE: Retract gear after positive climb rate confirmed. Gear retracts below 400 km/h. | |
| 08 | Climb Speed340-360 KM/H INITIAL |
PHS 10 - After Takeoff / Climb9 steps
| 01 | Landing GearUP AND LOCKED - 3 LIGHTS OUT | |
| 02 | FlapsRETRACT ABOVE 150 M AGL AT > 320 KM/HNOTE: Retract flaps above safe altitude once at 320-340 km/h. | |
| 03 | Air BrakesIN | |
| 04 | Climb PowerMILITARY (100%) - MAINTAIN | |
| 05 | Climb Speed500 KM/H IAS (NORMAL CRUISE CLIMB) | |
| 06 | Navigation ModeCONFIRM CORRECT MODE SELECTED | |
| 07 | SPO-15 RWRACTIVE - MONITOR FOR THREATS | |
| 08 | Fuel StateCHECK | |
| 09 | Engine ParametersBOTH IN LIMITS |
PHS 11 - Cruise / Transit8 steps
| 01 | Cruise AltitudeAS BRIEFED (LOW-LEVEL OR HIGH-ALT) | |
| 02 | Throttle Setting75-85% RPM FOR CRUISE | |
| 03 | Cruise Speed700-750 KM/H AT ALTITUDE / 500 KM/H LOW-LEVEL | |
| 04 | NavigationMONITOR RSBN / ARC WAYPOINTS | |
| 05 | Fuel StateMONITOR - COMPARE TO PLAN | |
| 06 | SPO-15 RWRCONTINUOUS MONITOR | |
| 07 | Bingo FuelMONITOR - INITIATE RTB IF REACHED | |
| 08 | Master ArmSAFE UNTIL COMBAT AREA |
PHS 12 - Attack / Weapons Employment12 steps
| 01 | Master ArmARMWARNING: Confirm clear of own forces and within authorized engagement area before arming. | |
| 02 | Weapon Mode SelectSELECT (ROCKETS / BOMBS / GUN / MISSILES) | |
| 03 | Attack Sight (ASP-17BTs)CONFIGURED FOR WEAPON TYPE | |
| 04 | Chaff / Flare System (SPO-15 / APP-50)ARMED - AUTO OR MANUALNOTE: Pre-arm countermeasures before entering defended airspace. | |
| 05 | Attack Run AltitudeAS BRIEFED (MIN 100 M AGL GUNS / 300 M ROCKETS) | |
| 06 | Attack Airspeed550-700 KM/H FOR STRAFE / ROCKETS | |
| 07 | Weapons Release / FireEXECUTE | |
| 08 | Break-off ManeuverINITIATE IMMEDIATELY AFTER RELEASENOTE: Su-25A is susceptible to own-weapon fragmentation - maintain safe escape distance. | |
| 09 | Safe Escape AltitudeCLIMB OR EGRESS - CLEAR THREAT ENVELOPE | |
| 10 | Master ArmSAFE AFTER ATTACK | |
| 11 | CountermeasuresDISPENSE AS REQUIRED | |
| 12 | Fuel / Engine CheckPOST-ATTACK CHECK |
PHS 13 - Descent / Approach10 steps
| 01 | WeaponsMASTER ARM SAFE | |
| 02 | Navigation ModeRTB / RETURN NAV SET | |
| 03 | RSBNSET TO RECOVERY AIRFIELD | |
| 04 | AltimeterSET QNH FOR RECOVERY AIRFIELD | |
| 05 | Fuel StateCONFIRM SUFFICIENT FOR APPROACH AND LANDING | |
| 06 | Engine ParametersBOTH IN LIMITS | |
| 07 | Descent Speed500-600 KM/H | |
| 08 | IFFON - MODE AND CODES CONFIRMED | |
| 09 | Navigation LightsON (FLASHING / STANDARD) | |
| 10 | Pattern EntryDOWNWIND AT 400 KM/H / 500 M AGL |
PHS 14 - Landing12 steps
| 01 | Landing GearDOWN - 3 LIGHTS GREENCAUTION: Lower gear on downwind below 400 km/h. Do not exceed gear limit speed. | |
| 02 | FlapsFULL LANDING POSITIONNOTE: Deploy full flaps on final approach. | |
| 03 | Air BrakesCLOSED FOR APPROACH | |
| 04 | Final Approach Speed250 KM/H (CLEAN) / 270-280 KM/H (HEAVY)NOTE: Maintain 250 km/h on short final at normal landing weight. | |
| 05 | Glideslope5 DEG - 5 M/S RATE OF DESCENT | |
| 06 | Turn Rate on Base30 DEG BANK / 1.4 G | |
| 07 | Runway AlignmentCONFIRMED ON SHORT FINAL | |
| 08 | TouchdownMAINS FIRST - FIRM CONTACT | |
| 09 | Throttles at TouchdownIDLE | |
| 10 | Drag ChuteDEPLOY IMMEDIATELY AFTER MAIN GEAR CONTACTNOTE: Pull drag chute handle after main wheels touch. Provides significant braking - standard procedure. | |
| 11 | Air BrakesFULL OPEN AFTER TOUCHDOWN | |
| 12 | Wheel BrakesAPPLY PROGRESSIVELY |
PHS 15 - After Landing8 steps
| 01 | Drag ChuteJETTISON AFTER CLEARING RUNWAY | |
| 02 | Air BrakesRETRACT | |
| 03 | FlapsRETRACT | |
| 04 | Master ArmSAFE | |
| 05 | IFFSTANDBY | |
| 06 | Navigation LightsSTEADY (OR AS REQUIRED) | |
| 07 | SPO-15 RWRSTANDBY | |
| 08 | Taxi Speed< 30 KM/H ON RAMP |
PHS 16 - Shutdown13 steps
| 01 | Parking BrakeSET | |
| 02 | ThrottlesIDLE - 2 MINUTE COOLDOWNNOTE: Allow engines to cool at idle for 2 minutes before shutdown to prevent turbine damage. | |
| 03 | AvionicsOFF (RWR, IFF, nav systems) | |
| 04 | Weapon SystemsOFF - ALL SAFE | |
| 05 | Right Engine Fuel CockCLOSE - CUT OFF | |
| 06 | Right Engine RPMDECREASING TO ZERO | |
| 07 | Left Engine Fuel CockCLOSE - CUT OFF | |
| 08 | Left Engine RPMDECREASING TO ZERO | |
| 09 | Generator SwitchesOFF (after both engines stopped) | |
| 10 | All Electrical SystemsOFF | |
| 11 | Battery SwitchOFF | |
| 12 | CanopyOPEN | |
| 13 | Ejection Seat Safety PinINSERTWARNING: Re-insert ejection seat safety pin when exiting aircraft to make seat safe. |