COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 107 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Electrical Equipment
AD/ELECT/54 Sealed Lead Acid Aircraft Batteries 7/90
All installed Gates Varley/Tungstone Energy Products/Hawker Energy Products sealed lead acid batteries listed below:
18 AH batteries with the following product numbers:
25 AH batteries with the following product numbers:
9750-0730, 9750-0734, 9750-0738, 9750-0640, 9750-0650,
9750-0740, 9750-0742, 9750-0744, 9750-0658, 9750-0660
9750-0772. 9750-0750, 9750-0781.
Note 1. Aircraft known to have batteries of this type fitted include but are not limited to BAe 125 Series; Shorts Skyvan Series; and BAe. Jetstream series.
Note 2. Gates Varley SB M1-89 Issue 2 (made mandatory by CAA (UK) also refers.
Remove from the aircraft and carry out a capacity test in accordance with the aircraft maintenance manual or other approved procedure.
1. 18 AH batteries in the serial number range A1810 to A7637, and 25 AH batteries in the serial number range B0095 to CO 575 - initially 6 months after initial installation in an aircraft, and thereafter at intervals not exceeding 3 months.
2. 18 AH batteries with serial numbers below A1810 and above A7637, and 25 AH batteries with serial numbers below B0095 and above CO 575 - initially 6 months after initial installation, then after a further 6 months, and thereafter at intervals not exceeding 3 months.
Affected batteries have been found to exhibit an unexpected loss of capacity which reduces the time for which the battery can power emergency services in the event of a power failure.