05-51-18
ALL ú ú 01 Page 202 ú Jun 20/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757 MAINTENANCE MANUAL
TASK 05-51-18-212-012
3. Hail Strike on the Ground Conditional Inspection
________________________________________________
A. References
(1)
27-51-00/201, Trailing Edge Flap System
(2)
27-81-00/201, Leading Edge Flap System
B. Access
(1) Location Zones
200 Upper Half of Fuselage
300 Empennage and Body Section 48
400 Power Plants and Nacelle Struts
500 Left Wing
600 Right Wing
700 Landing Gear and Landing Gear Doors
800 Doors
C. Procedure
S 042-021
WARNING: DO THE DEACTIVATION PROCEDURE FOR THE FLAP/SLAT ACTUATION
_______ SYSTEMS. INJURY TO A PERSON OR DAMAGE TO EQUIPMENT CAN OCCUR IF THE FLAPS/SLATS MOVE. FLAP/SLAT ACTUATION SYSTEMS MUST NOT BE OPERATED DURING THIS INSPECTION. FAILURE TO OBEY CAN CAUSE INJURY TO PERSONS.
(1)
Do the deactivation procedure for the leading edge slat system (AMM 27-81-00/201).
S 042-016
(2)
Do the deactivation procedure for the trailing edge flap system (AMM 27-51-00/201).
(3)
Do the examinations that follow:
S 212-017
NOTE: When you examine the honeycomb panels, look at the two sides
____ for cracks, delaminations, soft spots and core damage.
(a) The nose radome.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
757
MAINTENANCE MANUAL
(b)
The wings, for signs of hail damage to the areas that follow: 1) All horizontal surfaces. 2) Leading edges. 3) Trailing edges. 4) Panels.
(c)
The flight control surfaces.
(d)
The leading edge fairings on the horizontal stabilizer.
(e)
The leading edge fairings on the vertical stabilizer.
(f)
The external fuselage structure.
1) If signs of hail damage to the external fuselage structure is found, refer to SRM 51-10-04 for the analysis and continued service of airplanes with on-ground hail damage.
2) Refer to SRM 51-10-04 for the analysis and continued service of airplanes with on-ground hail damage.
(g)
The flight compartment windows, for signs of hail damage as follows: 1) Cracks. 2) Displacement of the outer window. 3) Other types of window damage.
(h)
The forward fuselage section above the flight compartment windows and the radome.
(i)
The wing tip fairings and navigation lights.
(j)
The passenger and cargo dooors.
(k)
The nacelle strut.
(l)
The nose landing gear doors.
(m)
The main landing gear doors.
(n)
The passener compartment windows for signs of hail damage as follows: 1) Cracks. 2) Displacement of the outer window. 3) Crazing. 4) Other types of window damage.
(o)
Examine the nose cowl and the engine for signs of foreign object damage.
S 222-020
(4)
The allowable damage shown in the Structural Repair Manual is to be used to define the limits of damage within each component. (SRM 51-10-04).
S 442-018
(5)
Do the reactivation procedure for the leading edge slat system. (AMM 27-81-00/201).
S 442-019
(6)
Do the reactivation procedure for the trailing edge flap system (AMM 27-51-00/201).
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