34-11-21
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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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