TM 5-6675-322-14
Table 9-1.
OPERATOR PREVENTIVE MAINTENANCE CHECKS AND SERVICES - Cont
B - Before
W - Weakly
AN - Annually
(Number) -
Hundreds of Hours
D - During
M - Monthly
S
- Semiannually
A - After
Q - Quarterly
BI
- Biennially
ITEM
NO.
11
B
ITEM TO BE INSPECTED
PROCEDURE
SUPPORT lTEMS - Cont
Inspect Air Velocity Meter.
1.
Remove meter from plastic case.
2.
Examine meter for cracks or damage to plastic
body .
3 .
Tip meter upside down and check that pith ball
r u n s f u l l l e n g t h o f i n d i c a t i n g t u b e w i t h o ut
s t i c k i n g .
4.
Examine air inlet hoses.
They must be free of
o b s t r u c t i o n s .
5. Examine scale change orifice.
o f o b s t r u c t i o n s .
6 .
E x a m i n e c a l i b r a t i o n o r i f i c e.
o f o b s t r u c t i o n s.
It must be free
It must be free
For Readiness
Reporting
Equipment Is
Not Ready/
Available If:
Plastic body
has cracks.
The pith
b a l l s t i c k s
at one end.
A i r i n l e t
hoses are
clogged.
S c a l e o r i f i c e
is clogged.
C a l i b r a t i on
o r i f i c e i s
clogged.
9-20
