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MAINTENANCE MANUAL

DIAGONAL BRACE
MIDSPAR FUSE
AFT FUSE PIN
PIN ACCESS PANEL
LUBRICATION

INBOARD STRUTS

Nacelle Strut Access Panels
Figure 1 (Sheet 2)

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MAINTENANCE MANUAL

ROTARY NUT LATCH
TYPICAL STRUT PRESSURE RELIEF DOOR TYPICAL STRUT ACCESS DOOR

ROTARY NUT

STRUT SKIN ACCESS/PRESSURE STRUT SKIN ACCESS DOOR OR FAIRING RELIEF DOOR
OR FAIRING
DOOR LIP ROTARY NUT LATCH A-A B-B
Nacelle Strut Access Panels
Figure 1 (Sheet 3)

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MAINTENANCE MANUAL

Nacelle Strut Access Panels
Figure 1 (Sheet 4)

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MAINTENANCE MANUAL

 3.  Pressure Relief Doors
_____________________
 A.  The main function of pressure relief doors is to release internal strut pressure buildup due to a pneumatic leak or other malfunction. Latches on pressure relief doors are designed to release when internal pressure exceeds certain limits. Pressure relief doors may also be opened for access.
 (1)  
Each pressure relief door has two over-center linkage latches on one edge and a lip on the opposite edge to secure the door. Doublers or triplers are installed on the strut skin around doors to provide additional strength.

 (2)  
Four pressure relief doors are installed on the left side of inboard nacelle struts. Two pressure relief doors are installed on each side of outboard nacelle struts.

 (a)  Two hinged pressure relief doors are installed on each of the trailing edge fairing doors on each nacelle strut. These doors are secured with four pressure relief screws or a latch on the aft side and hinged on the forward side.
 4.  Trailing Edge Fairing Doors (Fig. 1)
___________________________
 A.  The left and right trailing edge fairing doors are located on the aft lower section of the strut. The diagonal brace, hydraulic system components and other equipment are accessible through the trailing edge fairing doors.
 B.  The doors are hinged at the top edge and latched together at the bottom and forward edges. Pressure relief panels are provided in the event of an internal malfunction resulting in a pressure buildup. View windows are located on each door for monitoring hydraulic equipment without opening the doors.
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 NACELLE STRUT ACCESS PANELS - MAINTENANCE PRACTICES
___________________________________________________
 1.  General_______
 A.  This procedure provides four tasks, one for removing access doors, one for installing access doors, one for opening trailing edge fairing doors, and one for closing trailing edge fairing doors.
 (1)  
Removing access doors consists of installing leading edge flap safety locks, if necessary, opening access door with screwdriver, and removing door from opening.
　
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