Textron Bell 412, Maintenance Manual

Page: 241 / 288

BHT-412-MM-2
5-00-00
Export Classification C, ECCN EAR99
i. Inspect engine firewalls for evidence of warping,
crushing, or other damage.
Chapter 53 j. Make a complete inspection of area where tailboom is
attached to forward fuselage section. This includes both sets of
attachment fittings and longerons, beam caps, skins, webs,
bulkhead flanges, and other structural members. Check torque
on attachment bolts to determine if yielding has occurred.
Chapter 67 k. Completely inspect flight control system from pilot
controls to rotor head for bent or damaged tubes, bellcranks,
bellcrank supports, and for damaged control system bearings.
Pay particular attention to pylon controls, lower cylinder
attachment support fitting, and adjacent airframe structure.
Chapter 29 l. Pressurize hydraulic system and check for leaks,
interference, binding, and satisfactory operation.
m. Inspect fuel, oil, and pneumatic system for damage.
Perform engine ground run and visually check fuel, oil, and
pneumatic lines for leaks.
Pratt & Whitney
Canada Engine
Maintenance Manual 3. Inspect engine in accordance with applicable Pratt &
Whitney Canada Engine Maintenance Manual.
4. If no significant damage is found, further inspection is
unnecessary
CONDITIONAL INSPECTIONS
5-37. AFTER HARD LANDING (CONT)
DATA REFERENCE INSPECTION TASK DESCRIPTION
INITIAL
MECH OTHER
15 DEC 2015 Rev. 23 Page 193/194