# Beechcraft Baron 58 — Normal Operating Procedures

> **NOT FOR FLIGHT** — source fidelity: not_applicable | operational review: none | completeness: normal_only | 1 unresolved safety defect(s)

Normal operating procedures for the Beechcraft Baron 58 with twin Continental IO-550 fuel-injected engines, constant-speed propellers, and retractable tricycle gear. Covers preflight walk-around through shutdown and securing. Each engine has its own fuel selector (LEFT / RIGHT / OFF) — verify the correct tank is selected for each engine before each phase. The IO-550 is fuel-injected; there is no carburetor heat. Counter-rotating propellers on the Baron cancel most P-factor at cruise power, but VMC and single-engine handling characteristics require type-specific training. All airspeeds, power settings, fuel quantities, manifold pressure values, and performance data must come from the specific aircraft POH. Not a substitute for qualified twin-engine instruction or Baron-specific checkout.

> **safety_defect**: Contains no airspeeds, power settings, fuel quantities, or other numerical limitations — all must come from the specific aircraft POH.
> **content_gap**: Equipment variations exist across Baron 58 airframes. Verify every item against the specific aircraft and its POH before use.

## Preflight Walk-Around

- [ ] Aircraft documents (ARROW) — **ON BOARD AND CURRENT**
- [ ] Weight and balance — computed for planned load — **WITHIN LIMITS PER POH**
- [ ] Fuel quantity — visually inspect both tanks each wing; compare with fuel gauges — **VERIFIED; ADEQUATE FOR FLIGHT PLUS REQUIRED RESERVES**
- [ ] Fuel grade and appearance — sample all sump drains including nacelle sumps on both engines — **CORRECT GRADE PER POH; CLEAR, NO WATER OR SEDIMENT**
- [ ] Fuel caps — all filler ports — **SEATED AND LOCKED SECURELY**
- [ ] Left engine oil level — dipstick pulled, checked, cap secured — **WITHIN OPERATING RANGE PER POH; CAP SECURED**
- [ ] Left engine compartment — fuel injection lines, oil lines, induction ducting, and wiring — **NO LEAKS, CHAFING, OR LOOSE CONNECTIONS**
- [ ] Left engine induction air inlet and air filter — **UNOBSTRUCTED; FILTER SERVICEABLE**
- [ ] Left engine exhaust stacks and heat muffs — **NO CRACKS, LOOSE CLAMPS, OR HEAVY CARBON DEPOSITS**
- [ ] Left engine cowling — all fasteners — **CLOSED AND LATCHED**
- [ ] Left propeller — both blades; leading edges, tips, and faces for nicks, cracks, or erosion — **SERVICEABLE**
- [ ] Left propeller spinner and back plate — **SECURE; NO CRACKS OR LOOSE SCREWS**
- [ ] Left main gear — strut extension, torque links, tire condition and inflation, brake assembly, and gear doors — **STRUT NORMAL; TIRE SERVICEABLE; BRAKES ADEQUATE; DOORS UNDAMAGED**
- [ ] Left wing leading edge and upper/lower skin — **NO DEFORMATION, FUEL STAINING, OR IMPACT DAMAGE**
- [ ] Left fuel filler cap and wing vent — **CAP LOCKED; VENT CLEAR**
- [ ] Left aileron — hinges, control rod, balance weight, and travel — **SECURE; FULL AND FREE MOVEMENT**
- [ ] Left flap — hinge pins, actuator linkage, and condition — **SECURE; NO DAMAGE OR PLAY**
- [ ] Left wingtip — nav light and strobe lens — **UNDAMAGED; LENS INTACT**
- [ ] Nose gear — strut extension, torque links, shimmy damper, and nose tire — **STRUT INFLATED NORMALLY; TIRE SERVICEABLE; HARDWARE SECURE**
- [ ] Nose gear doors and retraction linkage visible through wheel well — **NO DAMAGE; LINKAGE INTACT**
- [ ] Pitot tube — cover removed, inlet clear of obstructions and insects — **COVER REMOVED; UNOBSTRUCTED**
- [ ] Static ports — fuselage ports on both sides — **CLEAR AND UNOBSTRUCTED**
- [ ] Fuselage — skin condition, antennas, ELT, cabin entry door latched, pilot door seals — **NO DAMAGE; ANTENNAS SECURE; DOORS LATCHED**
> **NOTE:** The Baron 58 has a separate aft cabin entry door on the right side — inspect its latch and seal as well as the forward pilot door.
- [ ] Horizontal stabilizer, elevator, and trim tab — both sides — **UNDAMAGED; HINGES SECURE; NO EXCESSIVE PLAY**
- [ ] Vertical stabilizer and rudder — hinges and travel — **UNDAMAGED; FREE MOVEMENT**
- [ ] Tail lighting — nav and beacon — **LENS INTACT AND SECURE**
- [ ] ELT — armed switch position and antenna connection — **ARMED; ANTENNA CONNECTED**
- [ ] Right main gear — strut, tire, brakes, and gear doors — **STRUT NORMAL; TIRE SERVICEABLE; BRAKES ADEQUATE; DOORS UNDAMAGED**
- [ ] Right flap and right aileron — condition and full travel — **SECURE; FULL AND FREE MOVEMENT; NO DAMAGE**
- [ ] Right wing leading edge, fuel cap, and vent — **NO DAMAGE; CAP LOCKED; VENT CLEAR**
- [ ] Right wingtip — nav light and strobe lens — **UNDAMAGED; LENS INTACT**
- [ ] Right engine oil level — dipstick pulled, checked, cap secured — **WITHIN OPERATING RANGE PER POH; CAP SECURED**
- [ ] Right engine compartment — fuel injection lines, oil lines, induction ducting, and wiring — **NO LEAKS, CHAFING, OR LOOSE CONNECTIONS**
- [ ] Right engine induction air inlet and air filter — **UNOBSTRUCTED; FILTER SERVICEABLE**
- [ ] Right engine exhaust stacks and heat muffs — **NO CRACKS, LOOSE CLAMPS, OR HEAVY CARBON DEPOSITS**
- [ ] Right engine cowling — all fasteners — **CLOSED AND LATCHED**
- [ ] Right propeller — both blades; leading edges, tips, and faces — **SERVICEABLE**
- [ ] Right propeller spinner and back plate — **SECURE; NO CRACKS OR LOOSE SCREWS**
- [ ] Tiedowns, chocks, and any external gust locks — **ALL REMOVED**

## Cockpit Preparation / Before Start

- [ ] POH — aboard and accessible to crew — **ON BOARD**
- [ ] Seats — position adjusted, seat-back locked; seat belts and shoulder harnesses for all occupants — **ADJUSTED, LOCKED, AND FASTENED**
- [ ] Control lock — **REMOVED**
- [ ] Flight controls — full travel check for freedom of movement — **FREE AND CORRECT**
- [ ] Avionics master switch — **OFF (prior to applying battery power)**
- [ ] Master switch (battery) — **ON**
- [ ] Fuel quantity gauges — both engines — **CHECK; CONSISTENT WITH VISUAL INSPECTION**
- [ ] Annunciator panel — press-to-test — **ALL LAMPS ILLUMINATE ON TEST; NONE REMAIN LIT**
- [ ] Landing gear position indicators — **THREE GREEN; DOWN-AND-LOCKED CONFIRMED**
- [ ] Gear warning horn — throttles retarded, confirm audible warning — **HORN SOUNDS**
- [ ] Left fuel selector — **LEFT TANK (or fullest tank per POH; NOT OFF)**
- [ ] Right fuel selector — **RIGHT TANK (or fullest tank per POH; NOT OFF)**
- [ ] Elevator trim — **SET FOR TAKEOFF PER POH**
- [ ] Rudder trim — **SET NEUTRAL OR PER POH**
- [ ] Aileron trim — **SET NEUTRAL OR PER POH**
- [ ] Flaps — **UP — confirmed on position indicator**
- [ ] Propeller controls — both — **FULL FORWARD (high RPM)**
- [ ] Mixture controls — both — **RICH (or as required for field elevation per POH)**
- [ ] Throttles — both — **CLOSED; THEN CRACKED SLIGHTLY OPEN**
- [ ] Parking brake — **SET**

## Engine Start

- [ ] Area around aircraft — clear of persons and obstructions on both sides — **CLEAR**
> **CAUTION:** The IO-550 engines are fuel-injected. Use the hot-start and cold-start procedures from the POH — priming with the boost pump followed by a specific throttle position differs between hot and cold conditions.
- [ ] Left fuel selector — **LEFT TANK — CONFIRMED ON**
- [ ] Left mixture — **RICH (or as required per POH)**
- [ ] Left boost pump — energise briefly to prime per POH cold-start procedure — **ON MOMENTARILY; FUEL FLOW INDICATED; THEN OFF**
- [ ] Left throttle — **CRACKED OPEN PER POH START SETTING**
- [ ] Left ignition switch — **START — engage starter**
- [ ] Left oil pressure — confirm pressure rise after start — **RISING; WITHIN LIMITS PER POH**
- [ ] Left throttle — after engine fires — **REDUCE TO IDLE PER POH**
- [ ] Right fuel selector — **RIGHT TANK — CONFIRMED ON**
- [ ] Right mixture — **RICH (or as required per POH)**
- [ ] Right boost pump — energise briefly to prime per POH cold-start procedure — **ON MOMENTARILY; FUEL FLOW INDICATED; THEN OFF**
- [ ] Right throttle — **CRACKED OPEN PER POH START SETTING**
- [ ] Right ignition switch — **START — engage starter**
- [ ] Right oil pressure — confirm pressure rise after start — **RISING; WITHIN LIMITS PER POH**
- [ ] Right throttle — after engine fires — **REDUCE TO IDLE PER POH**
- [ ] Avionics master switch — **ON**
- [ ] Alternators — both; confirm charging indication — **BOTH CHARGING; LOADMETERS INDICATING NORMALLY**

## After Start / Before Taxi

- [ ] Oil pressures and oil temperatures — both engines — **WITHIN NORMAL RANGE PER POH**
- [ ] Engine instruments — vacuum, fuel flow, CHT, both engines — **ALL INDICATING NORMALLY**
- [ ] Annunciator panel — confirm no warning lights remain — **CLEAR**
- [ ] Flight instruments — altimeter, heading indicator, attitude indicator, VSI — **ALTIMETER SET; GYROS ERECTING; INSTRUMENTS ALIVE**
- [ ] Heading indicator — aligned with magnetic compass — **ALIGNED**
- [ ] Navigation and communication radios — all sets — **FREQUENCIES SET; VOLUMES ADJUSTED**
- [ ] Transponder — **CODE SET; IN STANDBY**
- [ ] Taxi and position lights as required — **ON**
- [ ] Parking brake — **RELEASE WHEN READY TO TAXI**

## Run-Up / Before Takeoff

- [ ] Parking brake — **SET**
- [ ] Flight controls — full travel sweep — **FREE AND CORRECT**
- [ ] Trim tabs — elevator, rudder, and aileron — **SET FOR TAKEOFF PER POH**
- [ ] Left fuel selector — **LEFT TANK OR PER POH; CONFIRM NOT OFF**
- [ ] Right fuel selector — **RIGHT TANK OR PER POH; CONFIRM NOT OFF**
- [ ] Mixtures — both engines — **RICH (or as required for field elevation per POH)**
- [ ] Engine run-up — advance both throttles together to run-up power per POH — **RPM STABILISED AT RUN-UP SETTING ON BOTH ENGINES**
- [ ] Left magneto check — select LEFT, then RIGHT, then BOTH — **RPM DROP ON EACH MAG WITHIN LIMITS PER POH; SPREAD ACCEPTABLE**
- [ ] Right magneto check — select LEFT, then RIGHT, then BOTH — **RPM DROP ON EACH MAG WITHIN LIMITS PER POH; SPREAD ACCEPTABLE**
- [ ] Left propeller cycle — advance to full forward, reduce RPM to observe drop, advance back to full forward — **RPM DROP NOTED; OIL CIRCULATING; CONTROL RETURNS SMOOTHLY**
- [ ] Right propeller cycle — advance to full forward, reduce RPM to observe drop, advance back to full forward — **RPM DROP NOTED; OIL CIRCULATING; CONTROL RETURNS SMOOTHLY**
- [ ] Propeller controls — after cycling, both — **FULL FORWARD (high RPM) FOR TAKEOFF**
- [ ] Engine instruments at run-up power — both engines — **OIL PRESSURE, OIL TEMP, FUEL FLOW, AND CHT ALL WITHIN LIMITS**
- [ ] Annunciator panel — **NO AMBER OR RED LIGHTS**
- [ ] Throttles — reduce to idle after run-up — **SMOOTH IDLE ON BOTH ENGINES**
- [ ] Landing gear handle — confirm DOWN position — **DOWN; THREE GREEN INDICATORS**
- [ ] Flaps — set for takeoff — **TAKEOFF POSITION PER POH; INDICATOR CONFIRMED**
- [ ] Doors — pilot door and cabin entry door — **LATCHED AND SECURED**
- [ ] Seat belts and shoulder harnesses — all occupants — **FASTENED**
- [ ] Boost pumps — both, as required for takeoff per POH — **ON OR OFF PER POH**
- [ ] Takeoff briefing — engine failure procedure, abort point, Vmc and Vyse review — **COMPLETED**

## Takeoff

- [ ] Strobes and landing lights — **ON**
- [ ] Transponder — **ALT (or ON for non-Mode-C)**
- [ ] Throttles — advance smoothly to full takeoff power, both engines together — **FULL POWER; POWER SYMMETRIC**
- [ ] Engine instruments — brief crosscheck during roll — **MANIFOLD PRESSURE, RPM, AND FUEL FLOW NORMAL BOTH ENGINES**
- [ ] Rotation — at rotation speed per POH — **ROTATE SMOOTHLY**
- [ ] Landing gear — after positive rate of climb established — **GEAR UP; THREE GREEN EXTINGUISHED; GEAR-IN-TRANSIT LIGHT OUT**
- [ ] Airspeed — climb at or above Vmc; target Vy or Vx per POH — **POSITIVE CLIMB CONFIRMED**

## Climb

- [ ] Airspeed — establish climb speed per POH — **ON SPEED PER POH**
- [ ] Power — set climb power per POH (manifold pressure and RPM) — **CLIMB POWER SET BOTH ENGINES**
- [ ] Mixtures — adjust per POH for altitude and climb power — **ADJUSTED PER POH**
- [ ] Boost pumps — off when clear of traffic area per POH — **OFF PER POH**
- [ ] Flaps — retract on schedule per POH if takeoff flaps used — **UP; CONFIRMED ON INDICATOR**
- [ ] Engine instruments — monitor both engines throughout climb — **OIL PRESSURE, OIL TEMP, CHT, AND FUEL FLOW WITHIN LIMITS**
- [ ] Fuel balance — check both tank gauges; consider switching tanks if imbalance developing — **WITHIN BALANCE LIMITS PER POH**
- [ ] Altimeter — set to current altimeter setting; transition to 29.92 at transition altitude as applicable — **SET**

## Cruise

- [ ] Power — set cruise power per POH (manifold pressure then RPM) — **CRUISE POWER SET; BOTH ENGINES MATCHED**
- [ ] Mixtures — lean per POH for cruise altitude and power setting — **LEANED TO PEAK EGT OR PER POH PROCEDURE**
- [ ] Fuel selectors — confirm tank selection per POH fuel management schedule — **CORRECT TANKS SELECTED; NEITHER SELECTOR IN OFF**
- [ ] Engine instruments — both engines; oil pressure, oil temp, fuel flow, CHT, EGT — **ALL WITHIN NORMAL CRUISE LIMITS PER POH**
- [ ] Fuel quantities — both tanks; compute remaining endurance and compare with plan — **FUEL BURN CONSISTENT WITH PLANNED CONSUMPTION**
- [ ] Alternators and electrical load — both bus voltages and load indicators — **BOTH ALTERNATORS CHARGING; LOADS BALANCED**
- [ ] Vacuum / suction gauge — confirm pressure within operating range — **WITHIN LIMITS PER POH**
- [ ] Autopilot — engage if desired after aircraft is in trim — **ENGAGED OR HAND FLYING**
- [ ] Outside air temperature — monitor for icing conditions — **NOTED; NO ICING CONDITIONS INDICATED**

## Descent

- [ ] Fuel selectors — both engines; confirm active tanks have adequate fuel for approach and alternate — **TANK SELECTION CONFIRMED; FUEL ADEQUATE**
- [ ] Mixtures — enrich per POH as altitude decreases — **ADJUSTED FOR ALTITUDE PER POH**
- [ ] Power — reduce gradually; avoid shock-cooling by keeping power changes gentle — **DESCENT POWER SET PER POH**
- [ ] Engine instruments — confirm CHT not falling below limits during descent — **CHT WITHIN RANGE PER POH**
- [ ] Altimeter — set to current destination altimeter setting — **SET**
- [ ] ATIS / destination weather — obtain and brief — **OBTAINED; RUNWAY AND APPROACH TYPE NOTED**
- [ ] Avionics — communications and navigation frequencies set for arrival — **SET**

## Before Landing

- [ ] Fuel selectors — both engines; fullest available tank or per POH — **CORRECT TANKS CONFIRMED; NOT OFF**
- [ ] Mixtures — both engines; rich for landing — **RICH (or adjusted for field elevation per POH)**
- [ ] Propellers — both controls full forward for maximum RPM availability — **FULL FORWARD**
- [ ] Boost pumps — both; on for approach per POH — **ON PER POH**
- [ ] Landing gear — DOWN at or below gear extension speed per POH — **GEAR DOWN; THREE GREEN; HORN SILENT**
- [ ] Flaps — extend to landing position at or below flap extension speed per POH — **FLAPS SET PER POH; INDICATOR CONFIRMED**
- [ ] Seat belts and shoulder harnesses — all occupants — **FASTENED AND SNUG**
- [ ] Landing lights — **ON**

## Gear Check — Final

- [ ] Landing gear handle position — **DOWN**
- [ ] Three green gear-down indicator lights — **ALL THREE GREEN ILLUMINATED**
- [ ] Gear warning horn — confirm silent at approach power; if sounding, verify gear handle is down — **SILENT (GEAR DOWN AND LOCKED)**

## Landing

- [ ] Final approach — stabilised on speed per POH — **ON SPEED AND GLIDEPATH**
- [ ] Gear — confirm three green on short final — **THREE GREEN**
- [ ] Flares and touchdown — round out over the runway threshold; land on main gear first — **SMOOTH TOUCHDOWN**
- [ ] Throttles — retard to idle at touchdown — **CLOSED**
- [ ] Brakes — apply smoothly after mains are firmly on the runway — **APPLIED AS NEEDED**
- [ ] Directional control — maintain centreline with rudder; use nosewheel steering once speed permits — **CONTROLLED**

## Go-Around / Missed Approach

- [ ] Throttles — advance smoothly to full takeoff power on both engines simultaneously — **FULL POWER**
- [ ] Pitch — establish a climb attitude; airspeed at or above Vmc immediately — **POSITIVE CLIMB ATTITUDE; AIRSPEED ABOVE VMC**
- [ ] Flaps — retract to takeoff position on first increment per POH — **TAKEOFF FLAP SETTING**
- [ ] Landing gear — retract after positive rate of climb established — **GEAR UP; IN TRANSIT CONFIRMED**
- [ ] Flaps — retract fully after obstacle clearance and positive climb confirmed — **UP**
- [ ] Airspeed — accelerate to Vy per POH once clear of obstacles — **VY PER POH**
- [ ] ATC — advise of go-around and intentions — **NOTIFIED**

## After Landing

- [ ] Flaps — **RETRACT — UP**
- [ ] Boost pumps — both — **OFF (unless POH specifies otherwise)**
- [ ] Transponder — **STANDBY OR AS APPROPRIATE**
- [ ] Landing lights — **OFF OR TAXI SETTING AS REQUIRED**
- [ ] Mixtures — both engines; adjust to rich for taxi as appropriate — **RICH FOR TAXI (OR PER POH)**
- [ ] Brakes — test gently during taxi clear of runway — **EFFECTIVE**

## Engine Shutdown and Securing

- [ ] Parking brake — **SET**
- [ ] Avionics master switch — **OFF**
- [ ] Electrical loads — non-essential switches — **OFF**
- [ ] Engine cooling — run both engines at idle for a brief cooling period per POH before shutdown — **COOL-DOWN PERIOD COMPLETE**
- [ ] Left mixture — pull to idle cutoff to stop left engine — **IDLE CUTOFF; ENGINE STOPS**
- [ ] Left ignition switch — off after engine stops — **OFF**
- [ ] Right mixture — pull to idle cutoff to stop right engine — **IDLE CUTOFF; ENGINE STOPS**
- [ ] Right ignition switch — off after engine stops — **OFF**
- [ ] Master switch — **OFF**
- [ ] Fuel selectors — both — **OFF**
- [ ] Control lock — **INSTALLED**
- [ ] Doors — pilot door and cabin entry door — **SECURED; WINDOWS CLOSED**
- [ ] Tiedowns and chocks — **INSTALLED**
- [ ] Pitot tube cover — **INSTALLED**

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NOT FOR FLIGHT — source fidelity: not_applicable | operational review: none | completeness: normal_only | 1 unresolved safety defect(s)  
Source: authored — no source document  
Rights: original_expression CC-BY-4.0  
Checklist hash: 754659d9dbe88dd62ff72c07e9d20f780861b46a6629f4e64b7402862cad3d9a  
Verify against the aircraft's own approved documentation before use.