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A

737-300/400/500
MAINTENANCE MANUAL

SEEB C
SEE A
STATIC PORT
LOCKWIRE
LEFT SIDE SHOWN
RIGHT SIDE SIMILAR

FWD
A
STATIC HOSE
ELBOW
JAMNUT
O-RING STATIC PORTSTATIC SYSTEM RETAININGPRESSURE NUT AND WASHER

PORT SEALING (ALL PORTS) STATIC PORT
AIRPLANE SKIN

SEALING PLAN EXPLODED STATIC PORT (TYPICAL) BC
Alternate Static Port Installation
Figure 401

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737-300/400/500MAINTENANCE MANUAL
 (e)  Remove the static pressure port and any laminated shim from the installation hole.
 TASK 34-11-21-424-006
 3. Static Pressure Port Installation
_________________________________
 A. Consumable Materials
 (1)  A00247 - Sealant, BMS - 5-95
 B. References
 (1)  34-11-01/501, Pitot-Static System
 C. Access
 (1)  Location Zones
 101/102 Control Cabin
 202 Lower Nose Compartment
 208 Forward Cargo Compartment

 D. Procedure
 S 164-007
 (1)  
Clean and prepare the surface of the airplane around the installation hole.

 S 424-008

 (2)  
Install the static pressure port (see Figure 401):

 NOTE:  If the static port is not aligned with the surface, the port
____ must be microshaved (SRM 51-10-01).
 (a)  Install the static pressure port into the installation hole.
 NOTE:  The 737-300 static pressure port and the 737-400/500
____ static pressure port are not interchangeable.
___

 (b)  
Adjust the static pressure port until the port makes a continuous surface with the airplane skin.

 (c)  
Hold the static pressure port in its position.

 NOTE:  The maximum gap difference between the port and the airplane skin is 0.030 inch.

 (d)  
Install the static pressure port nut and washer.

 (e)  
Tighten the nut to a torque value from 250 to 400 inch-pounds.

 S 414-009
 (3) Install the lockwire on the nut of the static pressure port.
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737-300/400/500MAINTENANCE MANUAL
 S 824-025
 (4)  Shape the surface of the static pressure port until it is aligned
 +0.003/-0.000 inches with the airplane skin.
 S 204-011
 (5)  Make sure that there are no scratches, burrs, or deformations on the
 static port finish and around the sensing holes in the static port.
 S 204-012
 (6)  Make sure that there is no unwanted material in the holes of the
 static port.
 S 204-013
 (7)  Make sure the inlet holes on the static pressure port are free of
 blockage or damage.
 S 824-014
 (8)  Make sure the surface 3 inches forward and aft of the port and the
 port align by 0.010 inches.
 NOTE:____ To measure this distance, put a six inch straight edge
 horizontally against the center of the port.

 S 824-015
 (9)  
Make sure all of the rivets in a 3 inch radius of the port align with the surface by 0.003 inches maximum.

 S 844-016

 (10)
 Apply alodine on the external surface of the static pressure port.
　
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