PART NUMBERS.

T.O. 12P4-2APX-142

NAVAIR 16-35C6280-1

TM 11-5641-268-25

107. PART NUMBERS.

maintainability status of the parts used in the transponder

set controls. Policies, general information, and procedures

108. Two part number columns, one for each contractor,

for changing source and maintenance coding are contained

are used in the Group Assembly Parts Lists. The part num-

in T.O. 00-25-195. Generally, the source codes and mainte-

ber listed may be the contractor's number or the Govern-

nance repair level codes herein (see Source Code and Repair

ment standard part number. Where a dash () is shown in

Code columns) were assigned by Air Force personnel when

one part number column (to indicate a deliberate omission)

this equipment was purchased. Assignment of codes was in-

and a part number is shown in the other part number col-

fluenced by (a) maintenance policies, (b) predicted mainte-

umn, it indicates that the part is limited in use to the con-

nance actions, (c) base facilities and capabilities, and (d)

tractor for whom the part number is shown. Other part

economic considerations. Definitions of these codes follow:

numbers, such as the manufacturer's part number for the

part used by the contractor, are included within paren-

Code "P" is applied to parts on which

theses in the Description column at the end of the part

usage is anticipated or known. Code "P"

description.

parts may be requisitioned and installed by

109. The numerical code inserted at the top of each Part

any maintenance level unless followed by

Number column identifies the contractor (refer to para-

the letter "D" (depot), which restricts re-

graph 1017). The numerical code for the manufacturer of

quisition and replacement to depot level

the part, if other than the contractor, is included within

only. Restricted service manufacture is

parentheses, together with the manufacturer's part number,

considered practicable, but only after an

in the Description column at the end of the part description.

attempt has been made to procure from

It should be noted that the absence of a numerical code

supply sources.

and part number following a part description indicates that

Code "P1" is applied to parts which are

the item is either a contractor's part or a Government stan-

very difficult, impractical, or uneconomi-

dard part.

cal to manufacture. Code "PI" parts may

be requisitioned and installed by any main-

1010. USABLE ON CODES.

tenance level unless followed by the letter

1011. APPLICABILITY. In the Group Assembly Parts

"D" (depot), which restricts requisition

Lists, a letter designation inserted in the Usable On Code

and replacement to depot level only.

column indicates a limitation of use of the part. The absence

of a code in the Usable On Code column indicates that the

P1D Code "P1D" identifies parts which may be

part so listed is usable as a replacement in all transponder

requisitioned and installed by Air Force

set controls, if used for the same function. The applicability

activities which are authorized depot-level

of these codes is defined in paragraphs 1012 and 1013.

maintenance only. This code is applied to

parts which are impractical for service

101 2. CODES A AND B. Control, Transponder Set

manufacture.

C-6280(P)/APX and Control, Transponder Set C-6280A(P)/

APX can be used in aircraft having either a 6-volt or 28-volt

Code "P2" identifies insurance-type spare

panel-illuminating lamp supply, provided the lamps installed

parts which can be installed by any Air

have the same voltage rating as the aircraft's lamp supply.

Force activity consistent with the Com-

To distinguish between these lamps, the Usable On Code

mand's authorized scope of maintenance.

"A" has been assigned to the 6-volt lamps and the Usable

This code is applied to such parts which

On Code "B" has been assigned to the 28-volt lamps.

are basically structural and for which no

usage is anticipated or known; require spe-

1013. CODES C', D, AND E. Usable On Codes "C," "D,"

cial tools, templates, and/or jigs and are

and "E" are used to designate differences between the falters

very difficult, impractical, or uneconomi-

of the panel light holders. Code "C" is used for the blue-

cal to manufacture by Air Force activities.

white filter, code "D" is used for the red filter, and code

These items are not subject to periodic re-

"E" is used for the clear falter.

placement or wearout but may require in-

1014. SOURCE CODES.

frequent replacement as a result of acci-

dents or other unexpected occurrences.

1015. (Navy) Definitions and an explanation of Source,

Recoverability /Accountability, and Kit Codes used in the

P2D Code "P2D'' identifies insurance-type spare

Numerical Index of this manual are contained in BUWEPS

parts which may be installed by Air Force

INSTRUCTIONS 4423.2.

activities which are authorized depot-level

maintenance only. This code is applied to

1016. (Air Force) Source Codes in the Source Code col-

umn of the Numerical Index indicate the procurability and

parts as described under Code "P2."

102