FLIGHT MANUAL BO 105 CB-5/CBS-5
3 - 30
LBA APPROVED
Rev. 3
ENGINE EMERGENCY CONDITIONS
3.3.11 Compressor Stall
Conditions/Indications
– Dull humming or popping sounds
– Torque and N
1
indications erratic
– TOT fluctuates
– Possible light yaw jerk
Procedure
1. Collective lever – Adjust to OEI-limits or below
2. Affected engine – Identify
3. Power lever – Move slowly to IDLE
If compressor stall is still evident:
4. Single engine emergency shut-
down
– Perform
5. LAND AS SOON AS PRACTICABLE
If compressor stall ends:
4. Power lever – Move slowly to FLIGHT
NOTE D Severe stalls can cause damage to engine and drive system components and
must be handled as an emergency condition.
D Stalls of less severe nature (one or two low intensity pops) may permit contin-
ued operation of the engine at a reduced power level thus avoiding the condition
that caused the compressor stall.
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