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Document . . . . . . : TM 1- 1520- 237-23 - [ WP 1047 00] - 30 J ULY 2010, FLI GHT CONTROL RODS GENERAL I NFORMATI ONFrame t i t l e . . . . : TRI - PI VOT CONNECTI ONS [ 8 of 9]Document date . . . : Mon Nov 08 13:46:42 2010Pri nted at. . . . . : Sat Oct 27 07: 48:31 2012Page - 1

Pivot Connections

1. For flight control tri-pivot connections using AN3 and NAS6203 type bolts refer to

Figure 1 and perform installation procedures and gap requirements as follows:a. Install long bushing, NAS77A3 flange-type or NAS76 straight-type, through rod

end and slot in lever, and install bolt, AN3 or NAS6203, washer, and nut. TORQUE

NUT TO 12 - 20 INCH-POUNDS.

(1) Check for free rotation of long bushing using finger force. Using feeler gage,

check for 0.002 - 0.125-inch gap between washer and rod end clevis Figure 1.

(2) If bushing cannot be rotated and clearance is less than 0.002 inch, use a longer

bushing or longer bolt or both to obtain 0.002 - 0.125-inch gap. Refer toTable 4 and

Table 5.

(3) If bushing can be rotated and clearance is more than 0.125-inch, use a shorter

bushing or shorter bolt or both to obtain 0.002 - 0.125-inch gap.

(4) If bushing cannot be rotated and clearance is 0.002 - 0.125-inch, remove and

inspect bushing.

(5) Any combination of thick or thin washers (not to exceed three) may be used to

obtain proper bolt length for inserting cotter pin. Refer to Figure 1 for cotter pin, M

S24665-153 Installation.

b. Install short bushing, 70400-00513, in slot on each side of rod end. Install bolt, A

N3 or NAS6203, and washer through bushings, rod end and lever. Install nut and

torque to 12 to 20 inch-pounds.

(1) Check for no rotation of short bushing and using feeler gage, check for 0.002 - 0.

125-inch gap between washers and rod end clevis on each side.

(2) If clearance is less than 0.002 inch on each side, use longer bushings or longer

bolt. Refer toTable 4.

(3) If bushings can be rotated and clearance is 0.002 - 0.125-inch, check bolt grip

length, bolt may be too long and nut is bottomed on bolt threads. Use a shorter bolt,

retorque nuts and recheck for no rotation of bushings and for a clearance of 0.002 -

0.125-inch.

(4) If bushings cannot be rotated and clearance is more than 0.125 inch, use

shorter bushings or shorter bolt or both to obtain 0.002 - 0.125-inch gap.

(5) Any combination of thick or thin washers (not to exceed three) may be used toobtain proper bolt length for inserting cotter pin. Install cotter pin.

Table 3. Washer StackupsMBIN

TION

WASHER

THICKNES

S (INCH)

QUANTI

TY

A 0.016 3

B 0.032 2

C 0.016 2

D 0.063 1

E 0.016 1

0.063 1

F 0.016 20.063 1

2. NAS77 Type bushings (Long Flanged Type) increase in

0.010-inch length increments.

Table 1. Maximum Bearing Radial PlayPART

NUMBER

NOMENCLATU

RE

BEARING

PART NO.

MAX.

PLAY

ACTION

REQUIRED

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Document . . . . . . : TM 1- 1520- 237- 23 - [Frame t i t l e . . . . : TRI - PI VOT CONNECTI ONSPage - 2

Table 1. Maximum Bearing Radial Play (sheet 2)


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Document . . . . . . : TM 1- 1520- 237- 23 - [ WP 1047 00] - 30 J ULY 2010, FLI GHT CONTROLrame t i t l e . . . . : TRI - PI VOT CONNECTI ONS [ 8 of 9]age - 3

3.


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Document . . . . . . : TM 1- 1520- 237- 23 - [ WP 1047 00] - 30 J ULY 2010, FLIFrame t i t l e . . . . : TRI - PI VOT CONNECTI ONS [ 8 of 9]Page - 4

NAS76 Type bushings (Long Straight Type)

ncrease in 1/32-inch length increments.

Table 6.

EXAMPLE:

NAS76

Type

BushingsAR

NO.

LEN

GTH

NA

S76

A3

-02

0

=

20

/32-

inchlon

g

NA

S76

A3

-

02

1

=

21

/32-

inch

lon

g

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