Cessna 182 - Rough Running Engine

3-8
ROUGH RUNNING ENGINE
 Assess the situation
 Consider manoeuvring the aircraft to optimize position for a forced landing should
situation deteriorate
 Take IMMEDIATE ACTIONS appropriate to the symptoms listed below
 If towing, refer to Partial Power Loss – Towing for additional actions
 If problem cannot be corrected quickly, land as soon as practicable
CONDITION
SYMPTOMS
ACTION
Incorrect Mixture Setting
Engine roughness
Normally associated with a
failure to properly adjust mixture
during climbs and descents
1. Adjust mixture as required
Engine Driven Fuel
Pump Failure
Sudden reduction in fuel
pressure and fuel flow rate, with
normal fuel quantity indications
1. Select Aux Fuel Pump ON
2. Land as soon as practicable
Fuel Exhaustion
Sudden reduction in fuel
pressure and / or fuel flow rate
with low fuel quantity indications
1. Select fullest fuel tank
2. Land as soon as practicable
Air Induction Icing
Reduced Manifold Pressure
1. Select alternate air to ON
2. Land as soon as practicable
Fouled Plugs
High EGT on one or more
cylinders
1. Lean mixture
2. If condition persists, land as
soon as practicable
Faulty magneto
Sudden engine roughness
1. Attempt to regain smooth
operation by reducing power if
safe to do so.
2. Land as soon as practicable.
CAUTION
Do not switch to single magneto
operation, as engine damage
may result.
Stuck Valve
No EGT indication on the
affected cylinder
1. Reduce power if safe to do so.
2. Land as soon as practicable.
Figure 3-7 Rough Running Engine Actions