MIL-PRF-5503G
4.6.10 Burst pressure. The actuator shall be subjected to increasing pressure at a rate not to
exceed 25,000 psi per minute until the burst pressure specified in SAE AS5440 is reached. The
actuator shall not rupture before the minimum burst pressure is reached.
4.6.11 Temperature.
4.6.11.1 Low temperature. The actuator shall be connected to a hydraulic fluid source with a
static head of 1 to 3 feet at -65°F for 3 hours after stabilizing the temperature of the actuator.
While maintaining the temperature at -65°F, the actuator shall be subjected to five complete
cycles with pressure buildup to operating pressure at the end of each stroke. Leakage shall not
exceed two drops at each external packing gland during this cycling, and mating parts shall not
bind (see 6.3.6).
4.6.11.2 Intermediate temperatures. Immediately following the low temperature test, the
actuator shall be warmed from -65° to 160°F for type I or 275°F for type II, while being
continuously cycled through complete strokes at maximum increments of 36°F to determine
satisfactory operation throughout the temperature range. Cycling shall be performed without
waiting for the temperature to stabilize. The actuator shall not bind.
4.6.11.3 High temperature. The actuator assembly shall be connected to a hydraulic fluid source
with a static head of 1 to 3 feet, and subjected to a temperature of 160°F for type I or 275°F for
type II, for 2 hours following temperature stabilization. The actuator shall be subjected to five
complete cycles with pressure buildup to operating pressure at the end of each stroke. There shall
be no binding or leakage.
4.6.12 Sand and dust. The actuator shall be subjected to the sand and dust test in RTCA/DO-
160.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the
contract or order (see 6.2). When packaging of materiel is to be performed by DoD or in-house
contractor personnel, these personnel need to contact the responsible packaging activity to
ascertain packaging requirements. Packaging requirements are maintained by the Inventory
Control Point's packaging activities within the Military Service or Defense Agency, or within the
military service's system commands. Packaging data retrieval is available from the managing
Military Department's or Defense Agency's automated packaging files, CD-ROM products, or
by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature which may be helpful, but
is not mandatory.)
6.1 Intended use. The actuators covered by this specification are intended for use in
aeronautical hydraulic systems covered by SAE AS5440 to actuate such individual units as
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