TB1--1520--238--20--94
(6) If voltage in step (2) is less than 0.05 volt RMS, the inspection is complete.
(7) If voltage of 0.05 volts RMS or less is not obtained, manually move push--pull rod (18) or (19)
of the corresponding servocylinder to obtain null of less that 0.05 volt RMS. Use multimeter. Record the new
null reading on DA form 2408--13--1. If the voltage is less than 0.05 volts RMS the inspection is complete.
(8) If voltage of 0.05 RMS or less is still not obtained, re--rig flight controls IAW ref 13.a and repeat
inspection procedures.
(9) If null of less than 0.05 volt RMS cannot be obtained, the servocylinder will be repaired by
supporting OLR teams IAW paragraph 9 and 10 of this TB.
c.
Disconnect external power--
(1) Attach filters A707 and A708 to DASE computer (13).
(2) Inspect (QA).
(3) External primary hydraulic power disconnected ref 13.a, paragraph 1.72.
(4) Remove rig pins as required (TM 1--1520--238--T). Inspect (QA)
CAUTION
Failure to remove rig pins will result in sheared cylinder shear pins.
d. The following steps apply to AH--64D Ref 13.(C) (TM 1--1520--Longbow/Apache IETM, CD No.1
Version 3.1.2, data 19 Nov. 98, CD Date 6 Dec 98). Perform the following steps from the AH--64D IETM task:
(1) Open and remove access panels.
(a) Remove access panels L200 and R200.
(b) Open access panel R295.
(c) Remove access panel L540.
(2) Apply External power to aircraft
(a) Apply external electrical power.
(b) Apply external air power.
(c) Apply external hydraulic power.
(3) Enter pilot station. Observe all safety precautions. OPEN BUCS/FMC CMPTR circuit break-
er on circuit breaker panel No.2.
WARNING
Turn off power before disconnecting or reconnecting wires and connectors. High current 28 VDC and/or
115 VAC is present. Failure to do so could result in death of serious injury.
(4) Install rig pins as required.
(a) Install --9 Rig Pin in collective control linkage, Ref 13.c.
(b) Install --9 Rig Pin in longitudinal control linkage, Ref 13.c.
(c) Install --9 Rig Pin in lateral control linkage, Ref 13.c.
(d) Install --9 Rig Pin in directional control linkage, Ref 13.c.
(5) Check servocylinders for electrical null.
4