(b)
Measure the run-on (self-locking) torque of each fastener.
(c)
Install each fastener to a torque value of the run-on torque plus 10 pound-inches (1.13 N.m).
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747-400
MAINTENANCE MANUAL
OUTBOARD NACELLE STRUT
Outboard Aft Thrust Reverser-to-Strut Fairing Panel No. 3
Figure 401
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747-400 MAINTENANCE MANUAL
NACELLE STRUT ACCESS PANELS - DESCRIPTION AND OPERATION
_______________________________________________________
1. General_______
A. Access panels include access doors, pressure relief doors, and trailing edge fairing doors.
B. Access doors and panels are provided in the nacelle strut to gain access to engine components, tubing, wiring, lubrication fittings, and structural members and attach points.
C. For panel number and description of each nacelle strut access panel, refer to AMM 06-09-09/201.
2. Access Doors (Fig. 1)____________
A. Access doors provide access to the nacelle strut torque box interior, to the area under the forward fairing, to behind the trailing edge fairing doors, and to structural fuse pins and bolts.
(1)
To provide access to the torque box interior, four doors are installed on each side of outboard struts, and four doors are installed on the left side and seven doors on the right side of inboard struts. These access doors are secured with rotary nut latches.
(2)
Other access doors are provided on the nacelle strut to access specific components as follows:
(a)
To provide access to remove the thermal anti-icing valve, an access door is installed on the left side of forward fairing No. 3. To provide access to override the thermal anti-icing valve, an access door is installed on the right side of forward fairing No. 3. These access doors are secured with rotary nut latches.
(b)
To provide access to deactivate the thrust reverser isolation valve, an access door is installed on forward fairings. On outboard struts, the access panel is installed on the left side of forward fairing No. 4 and is secured by countersunk fasteners. On inboard struts, the access door is installed on the left side of forward fairing No. 3 and is secured by rotary nut latches.
(c)
To provide access to midspar (inboard struts) or spring beam (outboard struts) fuse pins, an access panel is installed on each side of the nacelle strut with countersunk fasteners.
(d)
To provide access to the hydraulic reservoir bleed fitting, an access door is installed on the right trailing edge fairing door of each strut. These doors are secured with rotary nut latches and attached by a retaining cable.
(e)
To provide access to lubricate the diagonal brace aft fuse pin on inboard struts, an access door is installed on the left side of the aft fairing forward wedge. These doors are secured with rotary nut latches.
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A 747-400 MAINTENANCE MANUAL
PRESSURE RELIEF DOORS
ACCESS DOORS
SEE
B
SPRING BEAM BEARING LUBRICATION ACCESS DOOR
DOORS SEE
OUTBOARD STRUTS
Nacelle Strut Access Panels
Figure 1 (Sheet 1)
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