Commonwealth legislation

AD/ENST 28/18 - Alternator Field Cable Protection - Modification

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

Owners/operators of Enstrom F‑28 series helicopters must install a protective device (fuse or circuit breaker) on the alternator field cable, fitted as close as possible to the battery master relay.

The AD is mandatory to prevent cable faults from causing overheating or fire; it applied to all F‑28s, with compliance deadlines tied to the 28 Feb 1978 certification cutoff (pre‑certification aircraft required installation before registration; in‑service aircraft had 100 flight hours to comply).

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AD/ENST 28/18 - Alternator Field Cable Protection - Modification

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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source 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.

All other aircraft within 100 hours time in service after 28 February 1978.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.