(b)
Remove the bolt, the nut and the washer at the forward fitting.
NOTE: You will find one washer bonded to each side of the
____ wingtip fitting. Do not remove these washers.
CAUTION: AFTER YOU REMOVE THE LAST BOLT, THE WINGLET IS FREE TO
_______ MOVE. BE CAREFUL AND MOVE THE WINGLET AWAY FROM THE WINGTIP. YOU CAN CAUSE DAMAGE THE WINGLET OR THE AIRPLANE IF YOU ARE NOT CAREFUL.
(c) Use the recommended tool on the forward side of the aft fitting to hold the bolts while you loosen the nuts.
NOTE: The use of this tool will allow one single mechanic
____ to remove the nuts from the aft fitting.
(d) Remove the bolts, nuts and washers at the aft fitting.
NOTE: You will find one washer bonded to each side of the
____ winglet fitting. Do not remove these washers.
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747-400 MAINTENANCE MANUAL
(e) Remove the winglet.
S 434-006
(4)
If the airplane flies without the winglet, use safety wire to keep the bonded washers to the forward fittings on the wingtip.
S 034-007
(5)
If the airplane flies without the winglet, remove the ground straps from the wingtip.
S 414-018
(6)
If the airplane will fly without the winglet, apply speed tape to the open end of the trailing edge of the wingtip.
S 434-008
(7)
Put a cover along the open structure to prevent possible damage.
TASK 57-28-01-404-009
3. Winglet Installation____________________
A. Special Tools and Equipment
(1)
G57002-24 - Winglet Sling
(2)
G57004-7 - Installation/Removal Tool - Winglet Aft Mount Bolts
B. Standard Tools and Equipment
(1)
Positioner - Load (For 140 Pounds), LL-5-3, Permadur Industries, INC. 47 old camplain road, Somerville New Jersey, 08876 USA. (alternative)
(2)
Meter - Bonding (Ref 20-22-01/601)
(3)
Hoist - Suitable for reaching above the winglet with provisions for attaching the winglet sling
(4)
Brush - Bonding, stainless steel, rotary, No. P-33-SS, C.W. Morris Company, Detroit, Michigan, or Equivalent
C. Consumable Materials
(1)
A00247 Sealant - BMS 5-95, Class B
(2)
C00064 Coating - Surface Treatment, MIL-C-5541, Alodine
(3)
C00259 Enamel - Primer, Green, BMS 10-11
(4)
D00013 Grease - MIL-G-23827
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MAINTENANCE MANUAL
(5) Y436 "Scotch" Vibration Damping Tape (Speed Tape) - 3M Industrial Tape and Specialties Division, 3M Center, Bldg. 220-7E-01 St. Paul, Minnesota 55144-1000
D. References
(1) IPC 57-28-01 Fig. 1
E. Access
(1) Location Zone
539 Winglet, Left
639 Winglet, Right
F. Procedure
S 014-010
(1)
Remove the cover along the open structure.
S 034-011
(2)
If the airplane flew without the winglet, remove the safety wire from the forward wingtip fitting.
S 214-012
(3)
If the airplane flew without the winglet, remove the unwanted material.
NOTE: If the airplane will fly without the winglet, make
____ sure that you install the wingtip fairings at the leading and trailing edges of the wingtip.
S 024-017
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