Intermediate Preventive Maintenance Checks and Services Chart

NAVSHIPS 0967-217-4010

TM 11-5895-490-20

13070/5 (Navy), TM 38-750 (Army), and

a. Systematic Care. The procedures in para-

AFTO Form 29/29A (Air Force).

graphs 35 through 3-8 cover the routine sys-

tematic care and cleaning essential to proper

3-4. Intermediate Preventive Maintenance

upkeep and operation of the equipment.

Checks and Services

b. Maintenance Checks and Services. The

The intermediate preventive maintenance

maintenance checks and services charts (para

checks and services chart (para 3-5) provides

35 and 3-16) outline functions to be per-

verification of satisfactory operation at inter-

formed at specific intervals. These checks and

vals between the periodic inspections. The in-

services are performed to determine that the

terval at which the intermediate maintenance

equipment is in good general (physical) condi-

will be accomplished is 25 flying hours. The

tion, and good operating condition, and likely

intermediate maintenance should be performed

to remain combat serviceable. To assist the or-

concurrently with the intermediate mainte-

ganizational maintenance repairman in deter-

nance performed on the aircraft in which the

mining and maintaining combat serviceability,

equipment is installed. Adjustments of the

the charts indicate what to inspect, how to in-

maintenance interval should be made to compo-

spect, and what the normal conditions are; the

nents for any unusual operating conditions.

Reference column lists the appropriate refer-

Equipment maintained in a standby (ready for

ences and also contains corrective data infor-

immediate operation) condition must have in-

mation. If the defect cannot be remedied by the

termediate maintenance performed on aircraft

organizational maintenance repairman, a higher

that is in a standby condition. Equipment in

category of maintenance or repair is required.

limited storage (requires service before inspec-

Records and reports of these inspections must

tion) does not require intermediate mainte-

be made in accordance with NAVWEPS Form

nance.

3-5. Intermediate Preventive Maintenance Checks and Services Chart

Cable connectors

Check all connections to the RT-859/APX-72 and allied

components ensuring that they are all clean, intact, and not

loose fitting.

Pressurization

Check for 5 psig pressure.

Para 36

Exterior surfaces

Remove all dirt, grease, and moisture from all external sur- Para 37

faces as required. Check general condition of RT-859/

and 38

APX-72

and

MT-3809/APX-72

and

MT-3948/APX72.

Inspect for scratched paint, missing screws, and bent or

broken hardware. Repair as necessary.

Indicators

Check to see that the indicators are in good condition and Para 37

that their glass surfaces are clean and not cracked or

damaged.

Fuses

Check all operating fuses for condition and correct values.

Check spare fuses for proper value and quantity.

Knobs, dials, and switches

Check each control for proper mechanical action. Observe that

the mechanical action is without backlash, binding or

scraping.

Mountings

Inspect seating and stability of MT-3809/APX-72 or MT-

3948/-APX-72. Check for loose or missing hardware and

tighten or replace as necessary.

Power-on inspection

Check to see that, the RT859/APX-72 operates in accordance Para 3-9

with the power-on inspection procedures.

If required.

3-2