Inspection Procedures. - TB-1-1520-238-20-940003

TB 1--1520--238--20--94

Inspection Procedures.

a. Steps 8.a through 8.c applies to AH--64A; Step 8.d applies to AH--64D: Perform the appropriate

tasks. Annotate the DA Form 2408--18 that recurring inspections are required every125 aircraft hours. The

125 hour recurring inspection will coincide with phase and mid--phase intervals. ULLS A units will use inspec-

tion number A226.

(1) Apply external Primary Hydraulic Power TM 1--1520--238--23, paragraph 1.72.

(2) Install Rig Pins as Required

(a) Install --9 Rig Pin in collective control linkage IAW TM 1--1520--238--23, (paragraph

11.282.3 step h).

(b) Install --9 Rig Pin in longitudinal control linkage IAW TM 1--1520--238--23, (paragraph

11.286.3 step f).

step g).

(d) Install --9 Rig Pin in directional control linkage IAW TM 1--1520--238--23, (paragraph

11.294.3 step k).

(3) Remove External primary hydraulic power (paragraph 1.72).

(4) Enter pilot station (paragraph 1.56). Observe all safety precautions.

(5) Open ASE DC circuit breaker on pilot center circuit breaker panel.

WARNING

Turn off power before disconnecting or reconnecting wires or connectors. High current 28VDC and/or

115VAC is present. Failure to do so could result in death or serious injury. If injury occurs, seek medical

aid.

b. Perform servocylinder LVDT null check.

NOTE

All testing should be conducted with the filter adapters installed.

NOTE

The below referenced items are located in ref 13 (a) (TM 1--1520--238--23) on page 11--934 and page

11--935.

(1) Detach filter adapter A708 (14) from DASE computer (13). Do not disconnect connector

P688 from filter adapter A708.

(2) Detach filter adapter A707 (15) from DASE computer (13). Do not disconnect connector

P686 from filter adapter A707.

(3) Apply external electrical power TM 1--1520--238--23, paragraph 1.70.

(4) Apply external primary hydraulic power TM 1--1520--238--23, paragraph 1.72.

NOTE

For Table 1, TM 1--1520--238--23, page 11--939, substitute filter A708 for connector P688 and substitute

filter A707 for connector P686.

(5) Check for null of less than 0.05 volts RMS at corresponding servocylinder ram LVDT connec-

tor/filter pins. Test all eight connector pairs TM 1--1520--238--23, paragraph 11.217, Table 1. Record indica-

tion on the DA form 2408--13--1.