BHT-206A/B-SERIES-MM-1
5-00-00
Page 184 Rev. 14 30 APR 2013
Export Classification C, ECCN EAR99
• If the compressor stall or surge occurred on the ground
or in flight at any N
R
speed or torque setting, and there
was a noticeable yaw of the helicopter, do Part I, Part II,
and Part III of this inspection.
PART I: INVESTIGATE CAUSE OF COMPRESSOR
STALL OR SURGE
POWER PLANT
Rolls-Royce 250
Series Operation and
Maintenance Manual,
5W2 or 10W2
1. Examine the induction fairing for blockage. If the induction
fairing is found obstructed, refer to the appropriate Rolls-Royce
Operation and Maintenance Manual for further maintenance
action. If no blockage is found, do step 2.
2. Remove the induction fairing and examine the compressor
intake area as follows:
Chapter 71 a. Examine the compressor rotor for contamination. If
contamination is found, perform a compressor wash.
Rolls-Royce 250
Series Operation and
Maintenance Manual,
5W2 or 10W2
b. Inspect the compressor rotor for foreign object
damages in accordance with the appropriate Rolls-Royce
Operation and Maintenance Manual for proper action.
3. If step 1 and step 2 do not reveal an obvious cause for
compressor stall or surge, refer to appropriate Rolls-Royce
Operation and Maintenance Manual for further maintenance
action.
5-57. ENGINE COMPRESSOR STALL OR SURGE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
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