AUTOMATIC RIPCORD RELEASE, MODEL 451 OPERATION UNDER USUAL CONDITIONS

TM 10-1670-305-23&P AUTOMATIC RIPCORD RELEASE, MODEL 451 0008 00 OPERATION UNDER USUAL CONDITIONS OPERATING PROCEDURES CAUTION The power cable and power housing must be inspected if the AR2 was actuated prior to preparation for operation. Perform pre-operational PMCS procedures before operating the AR2 (WP 0018 00). Verify that the JUMP/OFF switch is in OFF position and that AR2 has been cocked at installation. WARNING If there is any indication of a leak in the aneroid, remove the AR2 from service. A leaking aneroid may cause a malfunction, which may result in death of parachutist. Check the AR2s for aneroid leakage at ground level before every jump. The yellow indicator should indicate the local ground altitude when the altitude dial is set to an altitude at least 3,000 feet above the local altitude. Example: If local ground elevation is 500 feet above mean sea level, and the altitude dial is set at 3,500 feet or above, the yellow indicator should be approximately half way between the mean sea level mark and the 1,000-feet mark. If there is a leak in the aneroid, the yellow indicator will show some altitude above 500 feet, such as 2,000 or 3,000 feet or higher. Note: Original issue AR2s have graduations between sea level and 6,000 feet only. Aneroid Leak Indicator (ECP-8/ECP-13 Upgrade Version) 0008 00-5 Change 1