H23823
512  Pilot Static System Component Location 
May 15/81  Figure 1  34-11-0 
Page 3 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

EFFECTIVITY
GJ ALL EXCEPT B2509-B2510

Pitot Static System Schematic  5C8 
34-11-0  Figure 2 (Sheet 1)  Jun 20/85 
Page 4 

BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

PITOT STATIC SYSTEM -MAINTENANCE PRACTICES
EFFECTIVITY
GJ ALL EXCEPT B-2524
1. General
A.  This section provides procedures for flushing and draining the pitot static system. Flushing removes or assures the absence of any foreign matter in the pitot static system. Draining removes or assures the absence of any liquid collected in the pitot static system.
2.  Pitot Static System Flushing
A.  Flushing to remove foreign matter and checking leakage tolerance of the pitot static systems may be carried out at the same time when deemed necessary. Flushing before every system leakage check is not normally required. Replacement of pitot static instruments or seal caps does not require flushing of the pitot static system.
B.  Equipment and Materials
(1)  Dry air pressure source, 0 to 15 pounds per square inch (gage) with filter and gage for measuring pressure
C.  Prepare to Flush Pitot Static System
(1)  Disconnect following hoses or tubes from the pitot static system, cap each hose or tube, remove quick-disconnect hose fittings, and restrain all hoses to prevent whipping.
(a)  
On GJ ALL EXCEPT B2509-B2510, disconnect hoses to captain's and first officer's vertical speed indicators, first officer's altimeter and mach airspeed indicator, and to cabin altimeter and differential pressure indicator on P5 panel.

(b)  
On GJ B2509-B2510, disconnect hoses to captain's combined standby airspeed/altimeter indicator.

(c)  
In electronic compartment, disconnect hoses to air data computers, flap load limiter airspeed switches, mach airspeed switch (if installed) and electronic pressure controller.

(d)  
Disconnect hoses from pitot and static system drain fittings and alternate static ports.

(e)  
Remove pitot static probes (34-11-11 R/I). Disconnect pitot and static hoses from each.

5C8
Feb 20/89 34-11-0 Page 201
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details.

Pitot Static System Drain Location  5B8 
34-11-0  Figure 201  Oct 20/84 
Page 202 
BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 

D.  Flush Pitot Static System
(1)  Flush pitot and static lines with dry filtered air (not exceeding 15 psig) for 3 minutes. Uncap each tube or hose and flush and recap in the order indicated in following steps.
(a)  
On GJ ALL EXCEPT B2509-B2510, flush captain's pitot system from pitot line disconnected from upper left pitot static probe to: 1) Pitot hose disconnected from air data computer No. 1. 2) Pitot line disconnected from drain fitting No. 1 located at left side end of E1 rack.

(b)  
On GJ B2509-B2510, flush captain's pitot system from capped T located behind instrument panel on outboard side to: 1) Pitot hose disconnected from combined standby airspeed/altimeter indicator. 2) Pitot line disconnected from upper left pitot static probe. 3) Pitot hose disconnected from air data computer No. 1. 4) Pitot line disconnected from drain fitting No. 1 located at left side end of E1 rack.

(c)  
On GJ ALL EXCEPT B2509-B2510, flush first officer's pitot system from capped T located behind first officer's instrument panel on outboard side to: 1) Pitot hose disconnected from mach airspeed indicator. 2) Pitot hose disconnected from upper right pitot static probe. 3) Pitot hose provisions for air data computer No. 2. 4) Pitot line disconnected from drain fitting No. 10 located at right side of E1 rack.

(d)  
On GJ B2509-B2510, flush first officer's pitot system from capped T located behind first officer's instrument panel on outboard side to: 1) Pitot line disconnected from upper right pitot static probe. 2) Pitot hose disconnected from air data computer No. 2. 3) Pitot line disconnected from drain fitting No. 10 located on right side of E1 rack.

(e)  
Flush No. 1 auxiliary pitot system from pitot hose disconnected from lower right pitot static probe to: 1) Pitot hose disconnected from flap load limiter airspeed switch No. 1. 2) On GJ ALL EXCEPT B2509-B2510,

pitot hose disconnected from mach airspeed warning switch. 3) Pitot line disconnected from drain fitting No. 3 located on right side of E1 rack.
　
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