Textron Bell 412, Руководство по обслуживанию

Страница: 264 / 288

BHT-412-MM-2
5-00-00
Page 214
Rev. 26 01 JUN 2018 Export Classification C, ECCN EAR99
1. Power plant:
a. Examine inlet screen for blockage.
Pratt & Whitney
Canada Engine
Maintenance Manual b. Inspect engine compressor region for salt, dust, oil, or
other contaminants. If contaminants are found, clean and
perform a power check in accordance with applicable Pratt &
Whitney Canada Engine Maintenance Manual.
c. Inspect for visible Foreign Object Damage (FOD) to
visible compressor blades.
d. If compressor stall (surge) occurred during
acceleration, refer to applicable Pratt & Whitney Canada
Engine Maintenance Manual for inspection procedures.
e. Perform test on pneumatic sense lines.
f. If step a through step e do not reveal cause of surge,
refer to applicable Pratt & Whitney Canada Engine
Maintenance Manual for inspection requirements.
Chapter 63
Chapter 65 2. Power train:
a. If compressor stall occurs below 85% N
1
speed, only
step b and step c are required, unless otherwise instructed in
step c.
b. Remove magnetic chip detectors from transmission,
intermediate gearbox, and tail rotor gearbox and inspect for
metal particles.
c. If no evidence of damage is found on tailboom fin and
no indication of metal particles are found on chip detectors,
clean chip detectors and reinstall. Return helicopter to flight
status and repeat chip detector inspection after 5 to 10
operating hours. If positive indication of damage is found on
tailboom fin or metal chips are found on chip detectors, on
initial or 5 to 10 hour inspection, comply with step e through
step i.
d. If compressor stall occurs at 85% N
1
or above, comply
with step b, step c, and step e through step i, in progression.
CONDITIONAL INSPECTIONS
5-41. AFTER COMPRESSOR STALL OR SURGE (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER