(b)
Flap Screw Mechanisms
(c)
Static Vents
(d)
Pitot Tube
(e)
Landing Gear Shock Strut Inner Cylinders
(f)
Landing Gear Actuator Rods
(g)
Engine Inlet
(h)
Engine Inlet Probe
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05-51-02
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
SEVERE OR UNUSUAL TURBULENCE, STALL, BUFFET, OR SPEEDS MORE THAN THE DESIGN
___________________________________________________________________________ LIMITS CONDITION - MAINTENANCE PRACTICES (CONDITIONAL INSPECTION)
_________________________________________________________________
1. General_______
A. The structural inspection in this task is applicable after a severe turbulence or buffet condition.
(1) It also applies to stalls (after the initial buffet or stick shaker condition) or airplane speeds more than the design speed.
TASK 05-51-03-212-043
2. Severe or Unusual Turbulence, Stall, Buffet, or Speeds More Than the Design___________________________________________________________________________ Limits Conditional Inspection_____________________________
A. References
(1)
AMM 05-51-06/201, Dragged Engine Nacelle/Engine Seizure/Engine and Strut Damage Condition.
(2)
AMM 06-09-09/201, Nacelle and Engine-to-Wing Fairing Access Doors and Panels
(3)
AMM 27-11-00/501, Aileron and Aileron Trim Control System
(4)
AMM 27-21-00/501, Rudder and Rudder Trim Control System
(5)
AMM 27-31-00/501, Elevator Control System
(6)
AMM 27-51-00/201, Trailing Edge Flap System
(7)
AMM 27-51-00/501, Trailing Edge Flap System
(8)
AMM 27-81-00/201, Leading Edge Flap System
(9)
AMM 27-81-00/501, Leading Edge Flap System
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
B. Inspection Guidelines
S 212-089
(1) The data that follows applies to a severe or unusual turbulence condition.
(a) The pilot must make a decision if a structural inspection is necessary.
NOTE: If an inspection is necessary, refer to the "Examine the
____ Airplane Structure" in this section.
NOTE: Severe turbulence is identified as turbulence which
____ causes large, abrupt changes in the altitude and/or attitude. The airplane could be out of control for short periods. It usually causes large variations in airspeed. Passengers and crew are moved violently against their seat belts and loose objects are moved around the airplane.
NOTE: Unusual turbulence is turbulence other than
____ severe the pilot believes may have caused damage to the airplane.
1) The flight vertical load acceleration limits that follow are specified in the FAA Flight Manual, Section I. If these flight maneuvering vertical load acceleration limits are exceeded, refer to the Examine Airplane Structure procedure in this section. a) Flaps up . . . . . . . . . . . . . . . 2.5g to -1.0g b) Flaps down . . . . . . . . . . . . . . 2.0g to 0.0g
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