TM 55-4920-428-13
REFERENCE DESIGNATION
FIGURE
INDEX
S1, S2
6-3
62
S3
6-3
52
S4
6-3
74
S5
6-3
53
S6
6-3
74
S7, S9
6-3
63
S11
6-3
67
S12
S13
S14
S15
S16
S17
S18
T1
TB1
TB2
TB3
TB4
TB5
TB6
TB6B
TB7
6-3
6-3
6-3
6-3
6-3
6-3
6-3
6-3
6-3
6-3
6-3
6-3
6-3
6-3
6-3
6-3
64
66
70
66
70
71
65
12
87
88
89
23
27
20
19
22
6-3. Index of Part Numbers. This index contains a complete listing of all items shown in the
Detailed Parts List compiled in alphanumeric sequence.
The index is arranged in columns as follows:
a. The Part Number Column contains the part numbers of the manufacturer of the part or the part
number assigned to it by the Boeing Vertol Co. Requisition parts thru TM55-4920-428-30P.
(1) Part number arrangement begins at the extreme left position and continues, one position at a
time, until all parts are arranged in sequence. The order of precedence, beginning the part number ar-
rangement at the extreme left (first) position, is as follows:
Letters A through Z for the alpha index
Numerals 0 through 9 for the numeric index.
(2) The order of precedence in continuing the part number arrangement on the second and suc-
ceeding positions of the part number from left to right is as follows:
Space (blank column)
Diagonal (/)
Point (.)
Dash or hyphen (-)
Letters A through Z, then
Numerals 0 through 9
Alphabetic (letter) 0 is listed as numerical zero’s
Examples of part number sequence
ABC0158
AN509-10
AN509C10R7
6-2
