Daily Maintenance Service and Inspection

a d d i t i o n a l information concerning sub-

These inspections are made to maintain

m i s s i o n of specific forms.

combat serviceability; that is, to maintain

the equipment in good general (physical)

condition, and in good operating condition.

35. Daily Maintenance Service and Inspection

To assist the organizational maintenance

Maintenance service and inspections of

repairman in maintaining combat service-

Transponder Set AN/APX-44 are required

ability, the charts indicate what to inspect,

on a daily basis in an aircraft installation.

how to inspect, and what the normal condi-

P a r a g r a p h 36 specifies services and in-

tions are; the References column lists the

spections that must be accomplished daily

a p p l i c a b l e references that contain addi-

and under special conditions listed below.

tional information. If the defect cannot be

a. Following the last flight of each day

r e m e d i e d by the organizational mainte-

or preceding the next day's flight.

nance repairman, higher echelon mainte-

b. When the equipment has been replaced

nance or repair is required. Records and

after removal for any reason.

reports of these inspections must be made

c. At least once each week if the equip-

in accordance with TM 38-750.

ment is maintained in a standby condition.

c. Maintenance Forms and Records.

Maintenance forms and records to be used

and maintained on this equipment are spec-

36. Daily Maintenance Service

ified in TM 38-750. Paragraph 3 contains

and Inspection Chart

Procedure

Item

References

No.

Normal condition or result

Item

}

Equipment must be complete,

SET: Inspect the equipment for

Para 37a through d and applicable

aircraft technical manual.

completeness and general con-

clean, and installed for oper-

dition. Check for evidence of

ation.

damage, proper mounting, and

safety wiring.

Applicable aircraft technical

Connectors and receptacle are

CONNECTIONS: Check cables,

manual.

connectors, and receptacles for

clean, intact, and not loose fit-

evidence of external damage.

ting. Cables are clean and in

good condition.

37. Cleaning

N o t e : Dry compressed air, not more than 15 pounds

p e r - s q u a r e - i n c h (psi) pressure, may be used to blow

out dust from corners. Be careful to prevent mechan-

Inspect the exterior of the transponder

i c a l damage from the airblast.

set. The exterior surfaces should be clean,

d. Clean the front panels, controls, and

free of dirt, grease, and fungus.

dials; use a soft clean cloth. If dirt is dif-

a. Remove loose dirt with a clean soft

ficult to remove, clean with mild soap and

cloth.

water.

Warning: Cleaning compound is flam-

e. R e m o v e r u s t a n d c o r r o s i o n f r o m

mable and its fumes are toxic. Do not use

m e t a l surfaces by lightly sanding them

near a flame; provide adequate ventilation.

with fine sandpaper. Brush two thin coats

b. Remove grease, fungus, and ground-

of paint on the bare metal to protect it

in dirt from the exterior surfaces of the

from further corrosion. Refer to the ap-

r e c e i v e r - t r a n s m i t t e r , control unit, an-

plicable cleaning and refinishing practices

t e n n a , and mounting; use a cloth dam-

specified in TM 9-2851.

pened (not wet) with cleaning compound.

W i p e dry with a clean, dry, lint-free

38. Intermediate Maintenance

cloth.

Service and Inspection

c. Remove dirt from the connectors of

t h e transponder set with a soft-bristle

The intermediate inspection provides

brush.

v e r i f i c a t i o n of satisfactory operation at