Interim CB Usage Restrictions

TB 1-1520-238-20-30

(6) If the preceding instructions do not correct the undesired voltage to P511, contact your local LAR and/or

MDHC FSR for further instruction.

(7) Remove external electrical power to the aircraft IAW TM 55-1520-238-23, PARA 1-7-16.

(8) Install the access cover to the power distribution center IAW TM 55-1520-238-23, para 2-3-44.

(9) Install the wing access covers IAW TM 55-1520-238-23, para 2-2-5. Reconnect the Hellfire connector,P511

and close and secure the pylon nose fakings.

f. Interim CB Usage Restrictions.

(1) Insert a copy of this Technical Bulletin into the aircrew information reading files,

(2) Units will train all AH-64A Pilots and Copilot/Gunner with the following CB usage restrictions to

prevent potential inadvertent missile launches:

WARNING

The Copilot/Gunner must not push in the DC Electric CB

If it has popped (in flight or on ground) with the safe/arm

switch in the arm and missile switch on when carrying live

Hellfire missiles on the aircraft. Both Pilot and Copilot

/Gunner missile switches must be positioned to off or both

Pilot and Copilot/Gunner safe/arm switches must be positioned

to safe prior to resetting the DC Electric CB.

10. Supply/Parts and Disposition. Not Applicable.

11. Special Tools, Jigs and Fixtures Required.

NOMENCLATURE

NSN

PART NO.

Multimeter

6625-00-999-6282

AN/URM-105C

or equivalent

Relay Removal Tool (4 prong)

5120-01-232-0023

CTJ-R12

Relay Removal Tool (2 prong)

5120-01-097-5219

CTJ-R06

Wire Insert/Removal Tool

5120-00-9154587

M81969/14-02

12. Application.

a. Category of Maintenance. AVIM. Aircraft downtime will be charged to AVUM.

b. Time Required.

(1) For RCCB Miswired Inspection.

(a) Total of 0.5 manhours using 2 persons.

(b) Total of 0.5 manhours downtime for one end item.