COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
Enstrom F-28 Series Helicopters
AD/ENST 28/18 Alternator Field Cable Protection - Modification 12/77
Applicability: All models.
Requirement: Install a circuit protective device (i.e. in line fuse or circuit breaker) in the field cable 28-3 (or 28-1 when optional overvoltage relay is fitted) as close as practical to the battery master relay connection.
Note: Air Navigation Order 108.32 Appendix 3, Table 6 provides a suitable cable and circuit protector co-ordination chart.
Compliance: 1. Before issue of Certificate of Airworthiness on all aircraft certificated after 28 February 1978.
2. All other aircraft within 100 hours time in service after 28 February 1978.