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27-31-17-790-801 Elevator Pitot System Leak - Test (P/B 201)
30-31-00-730-801 Pitot Probe, AOA Sensor, and TAT Probe Heater Test (P/B 501)
SWPM 20-20-00 Standard Wiring Practices Manual
B. Tools/Equipment
NOTE: When more than one tool part number is listed under the same "Reference" number, the
tools shown are alternates to each other within the same airplane series. Tool part numbers
that are replaced or non-procurable are preceded by "Opt:", which stands for Optional.
Reference Description
COM-1550 Meter - Bonding
(Part #: C15292, Supplier: 01014, A/P Effectivity: 737-ALL)
(Part #: M1, Supplier: 3AD17, A/P Effectivity: 737-ALL)
(Part #: M1B, Supplier: 3AD17, A/P Effectivity: 737-ALL)
(Part #: MODEL 1010-A, Supplier: 3AD17, A/P Effectivity: 737-ALL)
C. Consumable Materials
Reference Description Specification
A00247 Sealant - Pressure And Environmental - Chromate
Type
BMS5-95
A00708 Sealant - Fast Curing, 2-Part - PR-1828 AMS 3277
G01912 Lockwire - Monel (0.032 In. Dia.) NASM20995N~
C32
(QQ-N-281)
D. Location Zones
Zone Area
323 Vertical Fin - Front Spar To Rear Spar
E. Pitot Probe Installation
SUBTASK 27-31-94-110-001
(1) For the surface of the baseplate [5], do this task: Clean Bare, Clad, or Plated Metal with
Solvent, TASK 20-10-34-110-802.
SUBTASK 27-31-94-420-002
(2) Put the pitot probe [8] on the baseplate [5]:
(a) Install the bolts [3] and washers [4] in the baseplate [5].
(b) Install the lockwire, G01912 on the bolts [3].
SUBTASK 27-31-94-020-014
(3) Install the elbow [11] on the pitot probe assembly [8]:
(a) Make sure the center of the elbow [11] is aligned with the alignment mark on the inboard
side of the pitot probe [8] base (Figure 401).
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SUBTASK 27-31-94-420-005
(4) Put the new gasket [2] in position on the baseplate [5].
SUBTASK 27-31-94-420-012
CAUTION: USE WRENCHES TO APPLY COUNTER PRESSURE ON EACH SIDE OF THE FITTING
DURING ASSEMBLY. DAMAGE TO THE TUBE OR FITTING CAN OCCUR.
(5) Connect the pitot hose fitting [10] to the elbow [11].
NOTE: The lowest point of the flexible hose should be the connection with the pitot probe.
SUBTASK 27-31-94-020-012
(6) Remove the long screw [6] from the electrical connector [1], if it is installed.
SUBTASK 27-31-94-210-001
(7) Examine the electrical connector [1] for loose, bent, or broken pins.
SUBTASK 27-31-94-420-007
(8) Connect the electrical connector [1].
SUBTASK 27-31-94-420-008
(9) Install the long screw [6] in the electrical connector [1].
SUBTASK 27-31-94-390-001
(10) Apply a thin layer of sealant, A00247 or PR-1828 sealant, A00708, on the mating surfaces of the
baseplate [5] and pitot probe [8].
NOTE: You can use the quick curing sealant in applications where the aircraft needs to go
quickly back into service. The two part sealant should be mixed and then applied per
BAC5000 or BAC5030.
NOTE: If the aircraft needs to go quickly back into service, and you do not use the quick curing
sealant, it is not necessary to apply either sealant immediately if the cure time of either
of the two sealants will cause a flight delay. To prevent moisture damage to the
airplane, sealant should be applied as soon as it is convenient for the operator.
SUBTASK 27-31-94-420-009
(11) Do these steps to put the pitot probe [8] in its position:
(a) Hold the probe strut [7].
(b) Put the pitot hose fitting [10] and electrical connector [1] in the installation hole.
(c) Put the pitot probe [8] in its position on the airplane skin.
1) Make sure the airplane skin and the baseplate [5] are aligned in ± 0.04 inch (± 1.0
millimeters) or less.
SUBTASK 27-31-94-420-010
(12) Install the bolts [9] in the baseplate [5] of the pitot probe [8].
SUBTASK 27-31-94-420-011
(13) Tighten the bolts [9].
SUBTASK 27-31-94-390-002
(14) Fill the gap between the baseplate [5] and the airplane skin with sealant, A00247.
NOTE: It is not necessary to apply the sealant immediately if the cure time of the sealant will
cause a flight delay. To prevent moisture damage to the airplane, sealant should be
applied as soon as it is convenient for the operator.
(a) Make sure the baseplate [5] and sealant are flat with the airplane skin.
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EFFECTIVITY
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737-600-700-800-900 AIRCRAFT MAINTENANCE MANUAL飞机维护手册3(97)
