AFGS�87219B APPENDIX A
No tailoring is necessary for this paragraph.
REQUIREMENT LESSONS LEARNED (A.3.2) A.4.2 Performance requirements.
Overall performance of the EPS shall be verified by the following tests of the integrated
subsystem.
a. Laboratory tests of a subsystem mockup which accurately simulates the aircraft installation. Testing shall include the most adverse electrical loading, environmental, fault, and endurance conditions required of the subsystem.
b. Aircraft ground and flight tests of the installed EPS under the most adverse conditions of electrical loading, cooling, and flight maneuvers. Failure modes which are not
hazardous to personnel or the aircraft shall be simulated.
VERIFICATION RATIONALE (A.4.2)
These are general verification requirements for integrated EPS subsystems. Detailed testing should be specified in the Acceptance Test Procedures requested in the Statement of Work and approved by the Government.
VERIFICATION GUIDANCE (A.4.2)
No tailoring is necessary for this paragraph.
VERIFICATION LESSONS LEARNED (A.4.2) A.3.2.1 Electric power characteristics.
The electrical power system shall provide electric power to the terminals of the power
utilization equipment in accordance with the following characteristics: ------------.
REQUIREMENT RATIONALE (A.3.2.1)
To ensure electrical compatibility between the EPS and the equipments using electric power, it is necessary to establish an electric power interface. For manned aircraft, electrical equipment is built to operate from electrical power as defined by MIL-STD-704; thus, MIL-STD-704 defines the electrical power quality for both the EPS and the using equipment (at the input power terminals). The EPS for unmanned aircraft may deviate from this standard. The requirements for power quality were first established by MIL-E-7894 issued 28 April 1952 and subsequently superseded by MIL-STD-704 in October 1959. Present requirements have evolved through several revisions to MIL-STD-704. The interface characteristics controlled include voltage, frequency, distortion, and phase displacement including steady state and transient limits.
REQUIREMENT GUIDANCE (A.3.2.1)
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