FYI
3-3-E. ENGINE COMPRESSOR STALL/
SURGE
• INDICATIONS:
1. Engine pops.
2. High or erratic TOT.
3. Decreasing or erratic N1 or N2.
4. TORQUE oscillations.
• PROCEDURE:
1. Collective — Reduce power,
maintain slow cruise flight.
2. TOT AND N1 — Check for normal
indications.
3. ENGINE ANTI-ICING switch — ON.
4. PARTICLE SEP PRG switch (if
installed) — ON.
5. HEATER switch (if installed) — ON.
NOTE
Severity of compressor stalls/surges
will dictate if engine should be shut
down and treated as an engine
failure. Violent stalls/surges can
cause damage to engine and drive
system components, and must be
handled as an emergency condition.
Stalls/surges of a less severe nature
(one or two low intensity pops) may
permit continued operation of engine
at a reduced power level, avoiding
condition that resulted in
compressor stall/surge.
If pilot elects to continue flight:
6. Collective — Increase slowly to
achieve desired power level.
7. TOT and N1 — Monitor for normal
response.
8. Land as soon as practical.
If pilot elects to shut down engine:
9. Enter autorotation.
10. Throttle — Closed.
11. FUEL VALVE switch — OFF.
12. Accomplish autorotative descent and
landing. (Refer to AUTOROTATIVE
DESCENT PROCEDURE, paragraph
3-3-A-3).
To just be clear, that was seven years ago, I'm still in current flying practice on others to a total of.......? I'm not getting into the willy waving of hours and years flown, point remains, quicker to reduce power than to start fumbling for switches.