{
  "open_checklist_version": "1.0",
  "id": "cessna-152-emergency",
  "title": "Cessna 152 — Emergency Procedures (independently worded)",
  "description": "Emergency procedures for the Cessna 152 with Lycoming O-235 engine. Memory items are marked. No airspeeds or numerical limits are stated — those must come from the specific aircraft's POH. This file does not replace formal emergency training.",
  "aircraft": {
    "make": "Cessna",
    "model": "152",
    "variant": "standard",
    "icao_type": "C152",
    "category": "standard_normal",
    "engine": [
      {
        "make": "Lycoming",
        "model": "O-235",
        "type": "piston_4stroke",
        "count": 1
      }
    ],
    "propeller": "fixed_pitch",
    "gear": "fixed_tricycle"
  },
  "units": {
    "airspeed": "kt",
    "altitude": "ft",
    "fuel": "usgal",
    "weight": "lb",
    "pressure": "inhg",
    "temperature": "f"
  },
  "provenance": {
    "source": {
      "kind": "none",
      "notes": "No manufacturer document was consulted or copied. This file was authored from general familiarity with the Cessna 152 type. Numerical limitations are deliberately absent and must be supplied from the aircraft's own POH."
    },
    "transcription": {
      "method": "authored",
      "tool": "claude-sonnet-4-6",
      "date": "2026-08-11"
    },
    "contributors": [
      {
        "name": "Open Checklists project",
        "role": [
          "author"
        ]
      }
    ],
    "revision": {
      "file_revision": "0.1.0",
      "updated": "2026-08-11"
    }
  },
  "verification": {
    "source_fidelity": "not_applicable",
    "operational_review": "none",
    "completeness": "partial",
    "known_issues": [
      {
        "severity": "safety_defect",
        "description": "Contains no airspeeds, power settings, fuel quantities, temperatures, or other numerical limitations. This file cannot serve as a complete working emergency checklist until those values are supplied from the aircraft's POH.",
        "location": "whole file"
      },
      {
        "severity": "content_gap",
        "description": "Equipment variations exist across the 152 production run. Confirm each item reflects the specific aircraft's installed equipment before use.",
        "location": "whole file"
      }
    ]
  },
  "rights": {
    "status": "original_expression",
    "corpus_license": "CC-BY-4.0",
    "redistribution": "attribution_required",
    "notes": "The Cessna 152 Pilot's Operating Handbook remains under copyright. This file does not reproduce its wording or selection of items."
  },
  "sections": [
    {
      "id": "engine-failure-before-rotation",
      "phase": "engine_failure_before_rotation",
      "title": "Engine Failure on Takeoff Roll (Before Lift-Off)",
      "criticality": "emergency",
      "items": [
        {
          "type": "action",
          "text": "Throttle",
          "response": "CLOSED IMMEDIATELY",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-before-rotation-mem-1"
        },
        {
          "type": "action",
          "text": "Brakes",
          "response": "APPLY FIRMLY TO STOP ON REMAINING RUNWAY",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-before-rotation-mem-2"
        },
        {
          "type": "action",
          "text": "Mixture",
          "response": "IDLE CUT-OFF",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-before-rotation-mem-3"
        },
        {
          "type": "action",
          "text": "Ignition switch",
          "response": "OFF",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-before-rotation-mem-4"
        },
        {
          "type": "action",
          "text": "Master switch",
          "response": "OFF",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-before-rotation-mem-5"
        },
        {
          "type": "challenge",
          "text": "If unable to stop on runway, steer to minimize hazard to occupants and avoid populated areas",
          "tickable": true
        }
      ]
    },
    {
      "id": "engine-failure-after-takeoff",
      "phase": "engine_failure_after_takeoff",
      "title": "Engine Failure After Lift-Off",
      "criticality": "emergency",
      "items": [
        {
          "type": "action",
          "text": "Airspeed",
          "response": "BEST GLIDE — ESTABLISH IMMEDIATELY",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-after-takeoff-mem-1"
        },
        {
          "type": "caution",
          "text": "Do not attempt to turn back to the runway at low altitude. Land approximately straight ahead or with minor heading changes to avoid obstacles.",
          "tickable": false
        },
        {
          "type": "action",
          "text": "Landing area — select best available field ahead and within the glide",
          "response": "SELECTED",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-after-takeoff-mem-3"
        },
        {
          "type": "action",
          "text": "Throttle",
          "response": "CLOSED",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-after-takeoff-mem-4"
        },
        {
          "type": "action",
          "text": "Mixture",
          "response": "IDLE CUT-OFF when landing is assured",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-after-takeoff-mem-5"
        },
        {
          "type": "action",
          "text": "Ignition switch",
          "response": "OFF when landing is assured",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Master switch",
          "response": "OFF before touchdown",
          "tickable": true
        }
      ]
    },
    {
      "id": "engine-failure-in-flight",
      "phase": "engine_failure_in_flight",
      "title": "Engine Failure in Flight",
      "criticality": "emergency",
      "items": [
        {
          "type": "action",
          "text": "Airspeed",
          "response": "BEST GLIDE PER POH — ESTABLISH IMMEDIATELY",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-in-flight-mem-1"
        },
        {
          "type": "action",
          "text": "Landing area",
          "response": "IDENTIFY SUITABLE FIELD WITHIN GLIDING RANGE",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-in-flight-mem-2"
        },
        {
          "type": "action",
          "text": "Carburetor heat",
          "response": "FULL HOT — check for ice as cause of failure",
          "tickable": true,
          "memory_item": true,
          "id": "engine-failure-in-flight-mem-3"
        },
        {
          "type": "action",
          "text": "Fuel selector",
          "response": "CONFIRM BOTH ON",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Mixture",
          "response": "RICH",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Primer",
          "response": "LOCKED IN",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Ignition switch",
          "response": "CHECK BOTH; TRY LEFT THEN RIGHT IF ENGINE DOES NOT RESPOND",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Throttle",
          "response": "TRY PARTIAL ADVANCE TO CHECK FOR PARTIAL POWER",
          "tickable": true
        },
        {
          "type": "action",
          "text": "If engine does not restart — proceed to forced landing",
          "response": "MAINTAIN BEST GLIDE; COMMIT TO FORCED LANDING PROCEDURE",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Mayday — declare on 121.5 or current frequency",
          "response": "MAYDAY DECLARED; SQUAWK 7700",
          "tickable": true
        }
      ]
    },
    {
      "id": "engine-fire-in-flight",
      "phase": "engine_fire_in_flight",
      "title": "Engine Fire in Flight",
      "criticality": "emergency",
      "items": [
        {
          "type": "action",
          "text": "Mixture",
          "response": "IDLE CUT-OFF",
          "tickable": true,
          "memory_item": true,
          "id": "engine-fire-in-flight-mem-1"
        },
        {
          "type": "action",
          "text": "Throttle",
          "response": "CLOSED",
          "tickable": true,
          "memory_item": true,
          "id": "engine-fire-in-flight-mem-2"
        },
        {
          "type": "action",
          "text": "Fuel selector",
          "response": "OFF",
          "tickable": true,
          "memory_item": true,
          "id": "engine-fire-in-flight-mem-3"
        },
        {
          "type": "action",
          "text": "Master switch",
          "response": "OFF",
          "tickable": true,
          "memory_item": true,
          "id": "engine-fire-in-flight-mem-4"
        },
        {
          "type": "action",
          "text": "Cabin heat and air vents",
          "response": "CLOSED — prevent fire gases from entering cockpit",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Airspeed",
          "response": "INCREASE TO AID AIRFLOW SUPPRESSION OF FIRE — DO NOT EXCEED STRUCTURAL LIMITS",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Forced landing",
          "response": "EXECUTE IMMEDIATELY — SEE FORCED LANDING SECTION",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Mayday",
          "response": "DECLARE ON 121.5 OR CURRENT FREQUENCY; SQUAWK 7700",
          "tickable": true
        }
      ]
    },
    {
      "id": "engine-fire-ground",
      "phase": "engine_fire_ground",
      "title": "Engine Fire on Ground",
      "criticality": "emergency",
      "items": [
        {
          "type": "action",
          "text": "Throttle — if induction fire, attempt to draw flame back into intake by cranking",
          "response": "CLOSED; ENGAGE STARTER TO CRANK IF INDUCTION FIRE",
          "tickable": true,
          "memory_item": true,
          "id": "engine-fire-ground-mem-1"
        },
        {
          "type": "action",
          "text": "Mixture",
          "response": "IDLE CUT-OFF",
          "tickable": true,
          "memory_item": true,
          "id": "engine-fire-ground-mem-2"
        },
        {
          "type": "action",
          "text": "Fuel selector",
          "response": "OFF",
          "tickable": true,
          "memory_item": true,
          "id": "engine-fire-ground-mem-3"
        },
        {
          "type": "action",
          "text": "Ignition switch",
          "response": "OFF",
          "tickable": true,
          "memory_item": true,
          "id": "engine-fire-ground-mem-4"
        },
        {
          "type": "action",
          "text": "Master switch",
          "response": "OFF",
          "tickable": true,
          "memory_item": true,
          "id": "engine-fire-ground-mem-5"
        },
        {
          "type": "action",
          "text": "Evacuate aircraft — all occupants",
          "response": "EXIT IMMEDIATELY AND MOVE WELL CLEAR, UPWIND",
          "tickable": true,
          "memory_item": true,
          "id": "engine-fire-ground-mem-6"
        },
        {
          "type": "action",
          "text": "Fire extinguisher and emergency services",
          "response": "USE EXTINGUISHER IF SAFE TO APPROACH; CALL EMERGENCY SERVICES",
          "tickable": true
        }
      ]
    },
    {
      "id": "electrical-fire",
      "phase": "electrical_fire",
      "title": "Electrical Fire / Smoke in Cockpit",
      "criticality": "emergency",
      "items": [
        {
          "type": "action",
          "text": "Master switch",
          "response": "OFF — remove electrical power source",
          "tickable": true,
          "memory_item": true,
          "id": "electrical-fire-mem-1"
        },
        {
          "type": "action",
          "text": "All electrical switches",
          "response": "OFF — individually, to isolate the fault before restoring power",
          "tickable": true,
          "memory_item": true,
          "id": "electrical-fire-mem-2"
        },
        {
          "type": "action",
          "text": "Cabin vents",
          "response": "OPEN — ventilate cockpit smoke",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Fire extinguisher",
          "response": "USE IF FIRE IS VISIBLE AND CAN BE REACHED SAFELY WITHOUT LOSING AIRCRAFT CONTROL",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Master switch — restore only if essential for continued safe flight",
          "response": "ON CAUTIOUSLY; OFF IMMEDIATELY IF SMOKE RECURS",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Land as soon as practicable",
          "response": "DIVERT TO NEAREST SUITABLE AIRPORT; DECLARE EMERGENCY IF REQUIRED",
          "tickable": true
        }
      ]
    },
    {
      "id": "oil-system-malfunction",
      "phase": "oil_system_malfunction",
      "title": "Loss of Oil Pressure",
      "criticality": "emergency",
      "items": [
        {
          "type": "action",
          "text": "Oil pressure and temperature gauges",
          "response": "CONFIRM LOW OR ZERO PRESSURE; NOTE IF TEMPERATURE IS ALSO RISING",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Landing area",
          "response": "IDENTIFY NEAREST SUITABLE FIELD AND PLAN FOR PRECAUTIONARY OR FORCED LANDING",
          "tickable": true,
          "memory_item": true,
          "id": "oil-system-malfunction-mem-2"
        },
        {
          "type": "action",
          "text": "Power",
          "response": "REDUCE TO MINIMUM REQUIRED FOR CONTINUED FLIGHT — HIGH POWER WITH NO OIL PRESSURE RISKS RAPID SEIZURE",
          "tickable": true
        },
        {
          "type": "caution",
          "text": "If oil temperature is also rising, engine failure is imminent. Do not wait for the engine to seize — proceed directly to forced landing.",
          "tickable": false
        },
        {
          "type": "action",
          "text": "Mayday",
          "response": "DECLARE ON 121.5 OR CURRENT FREQUENCY; SQUAWK 7700",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Mixture and ignition — when landing is assured",
          "response": "MIXTURE IDLE CUT-OFF; IGNITION OFF",
          "tickable": true
        }
      ]
    },
    {
      "id": "carburetor-icing",
      "phase": "carburetor_icing",
      "title": "Carburetor Ice",
      "criticality": "abnormal",
      "items": [
        {
          "type": "note",
          "text": "Indications: unexplained RPM loss, rough running, or engine stoppage — particularly in moist air with temperatures between approximately 20°F and 70°F (-7°C to 21°C). The Lycoming O-235 in the 152 is considered especially susceptible to carburetor icing. Treat any unexplained power loss as carb ice until proven otherwise.",
          "tickable": false
        },
        {
          "type": "action",
          "text": "Carburetor heat",
          "response": "APPLY FULL HOT IMMEDIATELY AND HOLD",
          "tickable": true,
          "memory_item": true,
          "id": "carburetor-icing-mem-2"
        },
        {
          "type": "action",
          "text": "Throttle — if engine is rough, hold current setting",
          "response": "DO NOT REDUCE POWER FURTHER WHILE ICE IS PRESENT",
          "tickable": true
        },
        {
          "type": "challenge",
          "text": "Expect a further RPM drop as ice melts and passes through — this is normal. Continue holding FULL HOT.",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Recovery confirmed",
          "response": "RPM RETURNS AND STABILIZES ABOVE PRE-ICE LEVEL; ENGINE RUNNING SMOOTHLY",
          "tickable": true
        },
        {
          "type": "action",
          "text": "If engine does not recover — prepare for forced landing",
          "response": "ESTABLISH BEST GLIDE; EXECUTE FORCED LANDING PROCEDURE",
          "tickable": true
        },
        {
          "type": "action",
          "text": "After recovery — carburetor heat management",
          "response": "CONTINUE CARB HEAT AS CONDITIONS WARRANT; DO NOT RETURN TO COLD IF ICING CONDITIONS PERSIST",
          "tickable": true
        }
      ]
    },
    {
      "id": "forced-landing",
      "phase": "forced_landing",
      "title": "Forced Landing (Power-Off)",
      "criticality": "emergency",
      "items": [
        {
          "type": "action",
          "text": "Airspeed",
          "response": "BEST GLIDE PER POH — ESTABLISHED AND HELD THROUGHOUT",
          "tickable": true,
          "memory_item": true,
          "id": "forced-landing-mem-1"
        },
        {
          "type": "action",
          "text": "Field selection",
          "response": "CHOOSE OPEN, LEVEL SURFACE INTO WIND WHERE POSSIBLE; AVOID OBSTACLES AND POPULATED AREAS",
          "tickable": true,
          "memory_item": true,
          "id": "forced-landing-mem-2"
        },
        {
          "type": "action",
          "text": "Mayday call — 121.5 MHz or current frequency",
          "response": "MAYDAY DECLARED: AIRCRAFT TYPE, POSITION, ALTITUDE, INTENTIONS",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Transponder",
          "response": "7700",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Fuel selector — when field is assured",
          "response": "OFF",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Mixture — when field is assured",
          "response": "IDLE CUT-OFF",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Ignition switch",
          "response": "OFF",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Master switch",
          "response": "OFF BEFORE TOUCHDOWN",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Flaps — deploy when field is positively within reach",
          "response": "EXTENDED AS REQUIRED FOR APPROACH ANGLE",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Seat belts and harnesses — all occupants",
          "response": "CONFIRM TIGHT",
          "tickable": true
        },
        {
          "type": "action",
          "text": "Doors — unlatch before touchdown",
          "response": "UNLATCHED TO PREVENT JAMMING ON IMPACT",
          "tickable": true
        },
        {
          "type": "challenge",
          "text": "Touch down at minimum controllable airspeed; use all available terrain to roll out and stop",
          "tickable": true
        }
      ]
    }
  ]
}