CHAPTER 3 OPERATOR/CREW AND ORGANIZATIONAL MAINTENANCE INSTRUCTIONS

TM 9-1220-238-14

CHAPTER 3

OPERATOR/CREW AND ORGANIZATIONAL MAINTENANCE INSTRUCTIONS

Section I. REPAIR PARTS, SPECIAL TOOLS AND EQUIPMENT

board plotting, M18 are listed in Appendix B.

3-1. Repair Parts.

Repair parts and equipment issued to the using

3-2. Tools and Equipment.

organization for operating and maintaining the

Refer to Appendix B section V.

Section II. LUBRICATION AND PAINTING

threads of thumbscrews (16 and 17, fig. B-2) on anchor

3-3. General.

end of scale assembly.

Lubrication of the board plotting M18 (fig. 1-1) is

d. Apply light coat of grease on wingscrew threads

required and accomplished by coating the following

of bracket assemblies (7,8, fig. B-1) and support leg

surfaces with a thin film of aircraft and instrument

socket and brace assembly (fig. 1-1).

grease, MIL-G-23827.

a. Apply light coat of grease MIL-G-23827 on

3-4. Painting.

shafts (4 and 7, fig B-6) and at bearing surfaces of

Paint all exposed surfaces so that the equipment will

bracket assembly (26, fig B-6).

Replenish as

have the appearance of a new item. Refer to TM 9-254

determined and required by operating and field

for detailed instructions on painting. Bearing surfaces,

conditions. Keep brake lever (fig. 1-1) clean and free of

sliding surfaces, mating surfaces, screw threads, and all

grease.

other critical surfaces must not show traces of paint or

b. Apply light coat of grease, MIL-G-23827 to

primer. Painting of the parts should be done at the most

moving peripheral surfaces of bearings (8 and 11, fig. B-

practicable stage of maintenance.

2) and screws (7 and 13, fig. B-2) in scale assembly

links (9 fig. B-2).

c. Apply light coat of grease MIL-G-23827 to

Section III. SERVICE UPON RECEIPT OF MATERIAL

tags, serial number and any information that may be

3-5. General.

continued on paper tags which may be attached to the

a. When new, used, or reconditioned material is

carrying chest.

first received by the using organization, it is the

(2) Remove board plotting, from chest by releasing

responsibility of the officer in charge to determine

twelve wing keys used to secure cover to chest.

whether the material has been properly prepared for

service by the supplying organization to be sure it is in

CAUTION:

condition to perform the function.

b. Make a record of any missing parts, tools, and

Do not mishandle or abuse the

equipment, and of any malfunctions. Correct any

equipment because inaccuracy or

deficiencies as quickly as possible.

breakage

will

result

from

mistreatment.

3-6. Duties.

The organizational mechanic performs the

b. Inspection

inspection to determine whether the material has been

(1) Upon receipt of the board plotting M18

prepared for service and is in condition to perform its

make a visual inspection for obvious physical damage

assigned mission. It is the duty of the operator to assist

such as cracked, damaged, loose, bent or broken parts,

the organizational mechanic in the performance of these

dented surfaces, nicks, burns, scratches, or chips, loose,

services.

missing or binding knobs, corrosion, fungus growth,

moisture, and missing parts.

3-7. Services.

(2) Check that mechanical components

Upon receipt of plotting board M18 by a using

operate smoothly without binding or rough motion.

organization, the following operations will be performed.

Check that moving parts are free from lint, grit and other

a. Unpacking

foreign matter which may hamper the operation of the

(1) The board plotting, M18 is housed in

instrument.

plotting board chest.

Before opening chest, and

(3) Inspect the instrument for missing com-

removing the Instrument carefully check identification

3-1