Intermediate and Periodic Preventive Maintenance Checks and Services Chart

TM 11-5820-518-20

be reported to higher category maintenance

WARNING

personnel. Records and reports of preventive

Adequate ventilation should be provided

maintenance must be made in accordance with

while using TRICHLOROTRIFLUORO-

procedures given in TM 38-750.

ETHANE. Prolonged breathing of vapor

should be avoided. The solvent should

3-4. Organizational Intermediate and Periodic

not be used near heat or open flame; the

Preventive Maintenance Checks and

products of decomposition are toxic and

Services

Since TRICHLOROTRI-

irritating.

a. General. Perform the maintenance func-

FLUOROETHANE dissolves natural oils,

tions indicated in the intermediate preventive

prolonged contact with skin should be

maintenance checks and services chart (para 3-5)

When necessary, use gloves

avoided.

every 25 flying hours (concurrently with the

which the solvent cannot penetrate. If

aircraft intermediate preventive maintenance

the solvent is taken internally, consult a

checks and services to reduce downtime). Refer

physician immediately.

to paragraph 3-10 (troubleshooting) for cor-

rective measures. Equipment that has a defi-

Compressed air is dangerous and c a n

ciency that cannot be remedied at the organi-

cause serious bodily harm if protective

zational category must be reported to higher

means or methods are not observed to

category maintenance personnel. Records and

prevent a chip or particle (of whatever

reports of Preventive Maintenance must be made

size) from being blown into the eyes or

in accordance with procedures in TM 38-750.

unbroken skin of the operator or other

b. Periodic Pullout Inspection. During the air-

personnel. Goggles must be worn at all

craft preventive maintenance checks and ser-

times while cleaning with compressed

vices, the electronic equipment (including

air. Compressed air shall not be used

the receiver-transmitter) will be removed from

for cleaning purposes except where

the aircraft for bench tests and inspections,

reduced to less than 29 pounds per

and replacement electronic equipments will be

square inch gage (psig) and then only

reinstalled from float stock. These tests and

with effective chip guarding and per-

inspections are performed by direct support

sonnel protective equipment. Do not

personnel. Perform the intermediate (para 3-5)

use compressed air to dry parts when

and periodic preventive maintenance checks

trichlorotrifluoroethane has been used.

and services after the float stock has been

c. Deficiencies that cannot be corrected must

installed.

3-5. Intermediate and Periodic Preventive Maintenance Checks and Services Chart

I Intermediate Preventive Maintenance Check

P - Periodic or Phased Preventive Maintenance Check

Interval

Item

Procedures

Item to be Inspected

No.

Check for completeness and satisfactory condition of the equipment.

Mission Essential

Report missing items.

Equipment

Check to see that pressure indicator (fig. 1-1) shows 3 to 5 psi

Pressure Indicator

internal air pressure in receiver-transmitter (center head of

indicator will protrude).

Remove and inspect air filter. Clean air filter in mild detergent and

External Blower Air

Filter

water. Dry and reinstall.

3-2

Change 5