Subsystem Pitot Leak Test.

TM 9-1270-219-13&P

4-13

L e a k T e s t s W h e n R e p l a c i n g L R U s . Leak

tests

I. S u b s y s t e m P i t o t L e a k T e s t .

must be performed

the

EPU

and

the

AADS

after

installation. No leak tests are necessary after installation

Connect the pneumatic circuit as shown in

(1)

o f the LAI. In order to leak test the installed EPU, it is

figure 4-15.

necessary to remove the AADS.

a. Leak Tests When Replacing the AADS.

R e p e a t the leakage test given in sub-para d.

(2)

( 4 ) through (7).

leak tests

Perform the EPU and plumbing

(1)

(paragraph 4-12 f. and g.).

m. Subsystem Pitot and Static Leak Test.

Install the AADS.

(2)

(1) Connect the pneumatic circuit as depicted in

Perform the subsystem leak tests (paragraph

(3)

figure 4-16.

4-12 l. and m.).

b. Leak Tests When Replacing the EPU.

Install the EPU (paragraph 4-6).

(1)

Remove the AADS (paragraph 4-3)

(2)

I t is essential that pitot and static lines

are teed together as shown to avoid

Perform the EPU and plumbing

leak tests

(3)

damage to the EPU.

(paragraph 4-12 f. and g.).

(4)

Install the AADS (paragraph 4-2).

Perform the subsystem leak tests (paragraph

(5)

(2) Repeat the leakage test of sub-para. e. (2)

through

(7).

4-12 I. and m.).

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