TB 1-1520-251-20-01
(e) Remove and install
d. The following is provided with regard to emergency procedures for the Apache Longbow.
NOTE
In the event of any electrical power anomolies, submit a category I
deficiency report. Prior to powering the aircraft after such an incident, the
flight management computer and both system processors shall be removed
for analysis. Any deficient generators shall also be removed and held.
Contact the logistical point of contact in paragraph 16.b. for disposition
instructions.
NOTE
Unit commanders will provide an initial briefing on the contents of this TB
to all AH-64D aviators assigned.
NOTE
Unit commanders will place a copy of this TB in the unit's aviators' reading
file.
e. The following urgent action changes will be made to paragraph 9.18. of the Longbow Operator 's
Manual.
WARNING
In the event of a complete loss of electrical power or a failure of the electrical
distribution system, the FMC SCAS and BUCS functions may not be
available. False indication of a dual hydraulic failure may be experienced.
The aircraft will become less stable but will remain controllable. Extreme
caution must be used when manipulating the controls. In addition, all four
MPDs, both HDUs, and the PNVS may blank, resulting in the inability of the
crew to monitor the aircraft systems via the MPDs or to interact with the
aircraft through MPD switch functions. Battery power will provide UFDs,
floodlights, standby instruments, UHF/VHF/FM1 radios, ICS, Transponder
Emergency Mode, force trim, and searchlight function. A battery charged
at 80% will normally supply the battery bus for approximately 12 minutes as
25 degrees C. Time will decrease accordingly if the temperature is
increased or decreased from 25 degrees C. The largest consumer of bat-
tery power is the searchlight. Battery power can be extended by minimizing
use of external lighting.
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