3-24 P/N 13772-005
Section 3 Cirrus Design
Emergency Procedures SR22T
Turbocharger System Emergencies
Unexpected Loss Of Manifold Pressure
1. Power ............... ADJUST to minimum required for sustained flight
2. Mixture .................... ADJUST for EGTs between 1300° to 1400ºF
3. Descend to MINIMUM SAFE ALTITUDE from which a landing may
be safely accomplished.
4. Divert to nearest suitable airfield.
5. Radio.............................................Advise ATC landing is urgent or
Tra nsm it (121.5 MH z) MAY DAY giving location and intentions
when workload permits.
6. Oil Pressure ................................................................... MONITOR
7. Land as soon as possible.
Amplification
If the aircraft experiences an unexpected loss of normal manifold
pressure, the engine will typically revert to operation similar to a
normally aspirated aircraft at approximately the same altitude.
However, continued flight should only be conducted to the nearest
suitable landing place in order to investigate the cause of the
unexpected loss of normal manifold pressure.
The four most probable causes are:
1. A leak or rupture at an induction system coupling or a loose or
failed induction coupling hose clamp.
a. This condition does not usually present a significant hazard,
other than power loss equivalent to a naturally aspirated
engine.
b. While this condition is the most probable, the following three
conditions may present an immediate hazard to continued
safe flight. Because it is difficult for the pilot to distinguish
between a simple induction system leak and any of the more
hazardous causes, all unexpected losses of manifold pressure
should be assumed hazardous.
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