PS Magazine - TB 43-PS-725

PS, The Preventative Maintenance Monthly

ISSUE 725

APRIL 2013
PS Magazine - TB 43-PS-725 - Page 14 of 33
± We’ve±come±up±with±a±smart±new±procedure±using±a±tool±that±doesn’t±
require±special±fabrication±or±unusual±parts.±It±also±saves±our±knuckles±and±
prevents±damage±to±drive±shafts,±gear±boxes±and±flanges.±It’s±primarily±an±
on-aircraft±task,±but±can±be±done±off±the±aircraft,±too.±
± The±tool±consists±of±the±following:
1.±An±old±flange,±
2.±Three±bolts,±
3.±Three±nuts,±
4.±Washers,±
24
PS 725
APR 13
25
PS 725
± Make±sure±you±paint±all±the±
parts±
red
±so±they±don’t±get±
confused±as±good±parts.±±
± We±follow±the±procedures±
all±the±way±through±to±Step±5±
of±the±removal±portion±for±the±
cotter±pin±in±IETM±WP±0648±
00±of±TM±1±1520-280-
23&P.
± Then±we±add±these±steps:
1.±
Install±the±bolts±one±at±
a±time±into±the±flange±
being±removed.±The±
bolt±head±must±point±
towards±the±gear±box±
and±you±may±have±to±
rotate±the±flange±a±little±
to±get±them±in.
2.
3.
Install±the±torque±
reactor±plate,±NSN±
PN±70700-20688-
041,±by±slipping±it±
over±the±three±bolts±
installed±on±the±flange±
in±Step±1.
Install±the±special±socket±from±the±power±train±tool±kit±with±the±teeth±
on±the±nut.±Then±place±the±red-painted±flange±over±the±three±bolts±
installed±in±the±flange±being±removed.
± You’ll±need±to±place±washers±between±the±red±flange±and±the±
torque±reactor±to±ensure±there±is±enough±space±between±the±red±
flange±and±the±special±socket.
Special socket
Washers
Washers
Start procedure after
removal of cotter pin
The±t
ool
±l
ooks
±like±so:
Cotter pin
725 24-25.indd
1-2
2/22/13
3:58 PM
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