# Diamond DA40 180 — 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 Diamond DA40 with 180-hp Lycoming IO-360 engine and constant-speed propeller. Covers preflight walk-around through shutdown and securing. Contains no numeric limitations; all speeds, fuel quantities, power settings, and performance values must be obtained from the specific aircraft POH/AFM. Accounts for the DA40's composite construction, T-tail, canopy-style entry door, left/right/both fuel selector, sidestick controls, and constant-speed propeller. G1000 glass panel is common on this type; verify avionics items against the specific aircraft configuration.

> **safety_defect**: Contains no airspeeds, power settings, fuel quantities, or other numeric limitations — all such values must come from the specific aircraft POH/AFM.
> **content_gap**: Equipment and avionics vary across DA40 production. Verify all items against the specific aircraft POH, supplements, and installed equipment before use.

## Preflight Walk-Around

- [ ] Aircraft documents (ARROW) — airworthiness certificate, registration, radio station license, operating handbook/AFM, weight-and-balance data — **ON BOARD AND CURRENT**
- [ ] Tie-downs and wheel chocks — all aircraft restraints — **REMOVED**
- [ ] Canopy — condition, seals, latch mechanism, and hinge hardware — **UNDAMAGED, SEALS INTACT, LATCH FUNCTIONAL**
- [ ] Pitot tube — cover removed, inlet clear of debris and obstruction — **COVER REMOVED, CLEAR**
- [ ] Static ports — both sides of fuselage — **CLEAR AND UNOBSTRUCTED**
- [ ] Fuel — left tank visual quantity check; verify cap seated and locked — **QUANTITY NOTED, CAP SECURE**
- [ ] Fuel — left tank sump drain; sample for water, sediment, and correct color — **CLEAR, CORRECT COLOR, NO CONTAMINATION**
- [ ] Left wing leading edge, skin, and composite surfaces — **NO DELAMINATION, CRACKS, OR IMPACT DAMAGE**
- [ ] Left aileron — attachment at hinge points, surface condition, and full range of motion — **SECURE, UNDAMAGED, FREE MOVEMENT**
- [ ] Left flap — hinge attachment and surface condition — **SECURE AND UNDAMAGED**
- [ ] Left wingtip and navigation light — **UNDAMAGED, LENS INTACT**
- [ ] Left main landing gear — strut extension, tire condition and inflation, brake disc and pad visible wear — **STRUT NORMAL, TIRE SERVICEABLE, BRAKES ADEQUATE**
- [ ] Nose section — composite skin for impact damage or cracks — **UNDAMAGED**
- [ ] Engine cowling — all latches and fasteners — **SECURE**
- [ ] Engine oil level — dipstick; within acceptable operating range per POH — **WITHIN RANGE; CAP REINSTALLED AND SECURE**
- [ ] Engine compartment — fuel and oil lines for leaks, wiring for chafing, no foreign objects — **CLEAR, NO LEAKS, SECURE**
- [ ] Induction air inlet — unobstructed; IO-360 is fuel-injected, no carburetor heat system — **INLET CLEAR**
- [ ] Exhaust stacks and visible exhaust system — **NO CRACKS, CORROSION, OR LOOSE CLAMPS**
- [ ] Propeller blades — each blade for nicks, gouges, cracks, and delamination; spinner condition and security — **BLADES SERVICEABLE, SPINNER SECURE**
- [ ] Nose gear strut — extension, shimmy damper, and tow bar removal — **STRUT EXTENDED NORMALLY, TOW BAR REMOVED**
- [ ] Nose gear tire — condition, inflation, and tread — **SERVICEABLE**
- [ ] T-tail — horizontal stabilizer, elevator, and elevator trim tab; inspect composite surfaces and hinge hardware — **UNDAMAGED, HINGES SECURE, NO DELAMINATION**
- [ ] Vertical stabilizer and rudder — composite skin condition, hinge security, and free movement — **UNDAMAGED, RUDDER FREE**
- [ ] Right main landing gear — strut, tire, and brake condition — **STRUT NORMAL, TIRE SERVICEABLE, BRAKES ADEQUATE**
- [ ] Right wing and fuel tank — leading edge, skin for delamination, fuel cap security — **UNDAMAGED, FUEL CAP SECURE**
- [ ] Fuel — right tank sump drain; sample for water and contamination — **CLEAR, CORRECT COLOR, NO CONTAMINATION**
- [ ] Right aileron and right flap — hinge attachment, surface condition — **SECURE, FREE, UNDAMAGED**
- [ ] Right wingtip and navigation light — **UNDAMAGED, LENS INTACT**
- [ ] Antennas — all externally visible antennas — **SECURE AND UNDAMAGED**
- [ ] Overall fuel quantity — both tanks combined; adequate for planned flight with required reserves — **VERIFIED ADEQUATE PER POH**

## Cockpit Preparation / Before Start

- [ ] Canopy — open for entry; inspect seal and latch before closing — **INSPECTED**
- [ ] Seats — fore-aft position and lock; ensure seat is secure before flight — **ADJUSTED AND LOCKED**
- [ ] Seat belts and shoulder harnesses — pilot and all occupants — **FASTENED AND SNUG**
- [ ] Canopy — close and verify latched; check both latch points — **CLOSED AND LATCHED**
- [ ] Passenger briefing — canopy latch operation, seatbelts, sterile cockpit, no smoking, emergency procedures — **COMPLETED**
- [ ] Sidestick and rudder pedals — full range of motion; correct response direction — **FULL AND FREE, CORRECT SENSE**
- [ ] Parking brake — **SET**
- [ ] Fuel selector — confirm position — **BOTH (or selected tank per POH)**
- [ ] All electrical switches — lights, avionics master, pitot heat — **OFF**
- [ ] Circuit breakers — **ALL IN**
- [ ] Flaps — set to takeoff position per POH — **SET PER POH**
- [ ] Elevator trim — set to takeoff position — **SET TO TAKEOFF**
- [ ] Mixture — **RICH (or per altitude per POH)**
- [ ] Propeller control — confirm lever position — **FULL FORWARD (HIGH RPM)**
- [ ] Throttle — **CLOSED / IDLE**

## Engine Start

- [ ] Propeller arc — visually confirm area clear of personnel and objects; announce intent — **CLEAR; 'CLEAR PROP' ANNOUNCED**
- [ ] Battery master switch — **ON**
- [ ] Alternator switch — **ON**
- [ ] Beacon / anti-collision light — **ON**
- [ ] Avionics master — **OFF (protect during cranking)**
- [ ] Fuel boost pump — prime per POH procedure for cold or hot start condition — **PRIMED PER POH**
- [ ] Throttle — position for start per POH — **SET PER POH**
- [ ] Ignition switch — START; release when engine fires — **ENGAGED, RELEASED ON START**
- [ ] Throttle — reduce to idle after start and allow engine to stabilize — **IDLE, STABILIZING**
- [ ] Oil pressure — verify positive rise within first 30 seconds; shut down if pressure does not rise — **RISING NORMALLY**
- [ ] Avionics master — on after engine is running and stable — **ON**
- [ ] Engine instruments — oil temperature rising, all gauges scanning into normal range — **NORMAL**

## Before Taxi / After Start

- [ ] G1000 / avionics — complete self-tests, verify database currency, GPS acquiring — **SELF-TESTS PASSED, DATABASES CURRENT**
- [ ] Altimeter — set current ATIS/ASOS altimeter setting; verify field elevation indication within tolerance — **SET, ELEVATION CONFIRMED**
- [ ] Heading indicator / HSI — verify alignment with magnetic compass — **ALIGNED**
- [ ] ATIS or AWOS — obtain current weather, active runway, and altimeter — **OBTAINED AND NOTED**
- [ ] Transponder — set assigned squawk code; select ALT mode — **CODE SET, ALT**
- [ ] Taxi clearance or CTAF self-announce — **RECEIVED / ANNOUNCED**
- [ ] Taxi and landing light — as required for taxi operations — **ON AS APPROPRIATE**
- [ ] Parking brake — **RELEASE WHEN READY TO TAXI**

## Run-Up / Before Takeoff

- [ ] Parking brake — **SET**
- [ ] Engine warm-up — verify oil temperature and pressure within normal range before run-up — **TEMPS AND PRESSURES NORMAL**
- [ ] Throttle — advance to run-up power setting per POH — **RUN-UP POWER SET**
- [ ] Magnetos — test LEFT then RIGHT; note RPM drop on each; verify drop within limits and differential within limits per POH — **DROP WITHIN LIMITS, DIFFERENTIAL WITHIN LIMITS**
- [ ] Propeller cycle — advance prop control to full forward; smoothly reduce RPM; note governor responding and RPM drop; advance back to high RPM. Repeat as directed by POH to circulate warm oil through governor. — **GOVERNOR RESPONSE CONFIRMED**
- [ ] Engine instruments — oil temperature, oil pressure, fuel flow, EGT/CHT within normal operating range — **ALL NORMAL**
- [ ] Throttle — reduce to idle; verify smooth idle; advance back to run-up — **SMOOTH IDLE CONFIRMED**
- [ ] Throttle — return to idle for final checks — **IDLE**
- [ ] Fuel selector — **BOTH (or as directed by POH)**
- [ ] Mixture — **RICH (or as required for field elevation per POH)**
- [ ] Propeller control — **FULL FORWARD**
- [ ] Flaps — confirm takeoff setting — **SET PER POH**
- [ ] Trim — elevator at takeoff position — **SET**
- [ ] Flight controls — final check of sidestick full travel and correct response — **FREE AND CORRECT**
- [ ] Canopy — fully latched at both latch points; no canopy unlock indication — **LATCHED AND VERIFIED**
- [ ] Seat belts and shoulder harnesses — **FASTENED ALL OCCUPANTS**
- [ ] Approach and departure briefing — abort criteria, emergency return, traffic pattern — **BRIEFED**

## Takeoff

- [ ] Runway — confirm clear of traffic; obtain clearance or announce on CTAF — **CLEAR, CLEARED OR ANNOUNCED**
- [ ] Strobes / landing light — **ON**
- [ ] Transponder — **ALT MODE CONFIRMED**
- [ ] Throttle — smoothly advance to full power — **FULL POWER**
- [ ] Engine instruments — scan at full power; abort if any indication abnormal — **NORMAL**
- [ ] Directional control on roll — use rudder pedals; nose-wheel steering lightly; sidestick neutral — **TRACKING CENTERLINE**
- [ ] Rotation — at Vr per POH; smooth back pressure on sidestick — **ROTATE AT Vr PER POH**
- [ ] Initial climb attitude — establish per POH; verify positive rate of climb on altimeter and VSI — **POSITIVE CLIMB**

## Climb

- [ ] Airspeed — establish climb speed per POH (Vy for best rate, or Vx for obstacle clearance) — **CLIMB SPEED PER POH**
- [ ] Flaps — retract per POH when clear of obstacles and at safe speed — **RETRACTED PER POH**
- [ ] Propeller — reduce to climb power setting per POH if appropriate — **PER POH**
- [ ] Throttle — set climb power per POH — **CLIMB POWER SET**
- [ ] Mixture — lean as required for altitude per POH — **PER POH**
- [ ] Engine instruments — CHT, oil temperature, oil pressure, fuel flow; verify all within limits — **WITHIN LIMITS**
- [ ] Fuel selector — verify BOTH or per POH fuel management procedure — **PER POH**
- [ ] Altimeter — confirm set to current altimeter setting; change to 29.92 when assigned by ATC or above transition altitude — **SET CORRECTLY**

## Cruise

- [ ] Cruise altitude reached — level off; allow airspeed to build before reducing power — **LEVEL AT CRUISE ALTITUDE**
- [ ] Propeller — set cruise RPM per POH power setting chart — **CRUISE RPM SET PER POH**
- [ ] Throttle — set cruise manifold pressure or power per POH chart — **CRUISE POWER SET**
- [ ] Mixture — lean to peak EGT then enrichen as directed by POH for power setting and altitude — **LEANED PER POH**
- [ ] Fuel selector — confirm BOTH or manage tanks per POH — **PER POH**
- [ ] Engine instruments — CHT, EGT, oil temperature and pressure, fuel flow; scan and verify in normal range — **ALL NORMAL**
- [ ] Fuel quantity — monitor both tanks; compare against fuel flow and elapsed time for reasonableness — **MONITORED, CONSISTENT WITH PLAN**
- [ ] Altimeter setting — update as new reports available — **CURRENT SETTING**
- [ ] Autopilot (if equipped) — engage and monitor; do not become complacent; continue scanning engine instruments — **AS DESIRED; MONITORING ACTIVE**

## Descent

- [ ] ATIS / AWOS / ASOS — obtain destination weather and current altimeter setting — **OBTAINED**
- [ ] Altimeter — set destination altimeter setting — **SET**
- [ ] Throttle — reduce to descent power; avoid rapid large throttle reductions that can shock-cool cylinders — **REDUCED GRADUALLY PER POH**
- [ ] Propeller — adjust per POH for descent configuration — **PER POH**
- [ ] Mixture — enrichen as altitude decreases; monitor CHT during descent — **ENRICHENED AS REQUIRED**
- [ ] Fuel selector — confirm BOTH — **BOTH**
- [ ] Engine instruments — continue monitoring; CHT should not drop rapidly; manage with power as needed — **WITHIN LIMITS, MONITORING**
- [ ] G1000 / avionics — program arrival, STAR, and approach as applicable — **PROGRAMMED AND BRIEFED**

## Before Landing

- [ ] Fuel selector — **BOTH**
- [ ] Mixture — **RICH**
- [ ] Propeller control — advance to full forward (high RPM) to prepare for go-around — **FULL FORWARD**
- [ ] Canopy — confirm latched; no unlock warning — **LATCHED**
- [ ] Seat belts and shoulder harnesses — all occupants — **FASTENED AND SNUG**
- [ ] Landing light — **ON**
- [ ] Flaps — extend to approach/landing position per POH when at or below flap extension speed — **SET PER POH**
- [ ] Airspeed — establish approach speed per POH for conditions and flap setting — **APPROACH SPEED PER POH**
- [ ] Go-around capability — mentally confirm power-in go-around is available; note any obstacles — **CONFIRMED**

## Landing

- [ ] Final approach — maintain stable approach speed and glidepath; do not let airspeed decay below approach speed — **STABLE, ON SPEED**
- [ ] Threshold — aim for touchdown zone; T-tail requires nose-high attitude; guard against over-rotation and tail strike — **ON CENTERLINE, NOSE HIGH**
- [ ] Flare — smooth progressive back pressure on sidestick; allow aircraft to settle — **SMOOTH FLARE**
- [ ] Touchdown — main gear first; hold nose off as long as practical, then lower nose gently — **MAIN GEAR FIRST, NOSE LOWERED GENTLY**
- [ ] Braking — apply smooth, progressive braking after nose is on ground; avoid hard braking that stresses nose gear — **SMOOTH PROGRESSIVE BRAKING**
- [ ] Directional control — use rudder pedals on rollout; keep tracking centerline — **ON CENTERLINE**

## Go-Around

- [ ] Throttle — smoothly advance to full power without hesitation — **FULL POWER**
- [ ] Establish climb attitude — pitch for positive rate; sidestick back to climb attitude; control T-tail pitch sensitivity — **CLIMB ATTITUDE**
- [ ] Flaps — retract incrementally per POH as airspeed increases and climb is confirmed — **RETRACTING PER POH**
- [ ] Airspeed — accelerate to Vy or Vx as required; do not allow airspeed to decrease below safe value — **CLIMB SPEED PER POH**
- [ ] Announce go-around intentions on frequency — **ANNOUNCED**
- [ ] Propeller control — **FULL FORWARD IF NOT ALREADY**
- [ ] Obstacle clearance — track runway centerline extended until clear of obstacles, then turn as required — **OBSTACLES CLEAR**

## After Landing / Shutdown and Securing

- [ ] Flaps — retract after clearing runway — **RETRACTED**
- [ ] Landing and strobe lights — as appropriate after clearing active runway — **AS APPROPRIATE**
- [ ] Transponder — set to standby or ground mode per local procedure — **STANDBY OR GROUND**
- [ ] Taxi to parking — taxi at safe speed; use differential braking as required for DA40's ground handling — **TAXIING SAFELY**
- [ ] Parking brake — set upon reaching parking position — **SET**
- [ ] Avionics master — off before shutdown — **OFF**
- [ ] Throttle — idle for brief engine cooling period per POH — **IDLE, COOLING**
- [ ] Mixture — pull to idle cut-off; allow engine to stop on fuel starvation — **IDLE CUT-OFF; ENGINE STOPS**
- [ ] Ignition — off after engine stops — **OFF**
- [ ] All electrical switches and lighting — **OFF**
- [ ] Battery master and alternator switch — **OFF**
- [ ] Fuel selector — **LEFT or RIGHT (off BOTH) per POH recommendation to prevent fuel siphoning**
- [ ] Canopy — open; canopy gas strut check for proper hold-open position — **OPEN AND SECURED**
- [ ] Control lock — install on sidestick to prevent wind damage — **INSTALLED**
- [ ] Tie-downs and chocks — secure aircraft per local procedures — **AIRCRAFT SECURED**
- [ ] Pitot cover — install to prevent insect ingestion and moisture — **INSTALLED**
- [ ] Fuel caps — verify both tanks properly capped — **SECURED**
- [ ] Post-flight inspection — walk around to check for fluid leaks, damage, or anomalies noted during flight — **COMPLETED, NO DISCREPANCIES (OR NOTED)**

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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: afcb0011eaf3c4c25392162b9bc173d227471698b3aed63f4e3f0f82636e7e3b  
Verify against the aircraft's own approved documentation before use.