T B M
PILOT’S INFORMATION MANUAL 700
SECTION 3
EMERGENCY PROCEDURES
D.G.A.C. Approved
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Page 3.3.8
Rev. 4
3.3 – ENGINE FAILURES
EXCESSIVE PROPELLER ROTATION SPEED
Indicates :
– a propeller governor failure
In that case, the propeller overspeed limiter will limit initially the
rotation speed to 2100 RPM approximately.
– or a propeller governor and overspeed limiter failure
In that case, only the torque limiter operates to limit the power.
However, the pilot intervention is necessary to maintain
Np ≤ 2000 RPM. The propeller reducer is designed for a max. Np of
2200 RPM.
1 – Reduce the power and the aircraft speed to avoid propeller rotation
speeds higher than 2000 RPM.
2 – Land as soon as possible.
3 – Do not perform a go–around.
A go–around would damage the propeller reducer.
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