Commonwealth legislation

AD/BELL 412/10 - Upper Anti-Collision Strobe Light P/No HR, DF-28DRMS Inspection, Modification and Replacement

RepealedCTH

This Act has been repealed and is no longer in force. It is retained for historical reference.

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Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This Airworthiness Directive mandates urgent safety fixes for Bell 412 helicopters equipped with a specific upper anti-collision strobe light (part numbers HR or DF-28DRMS).

The safety issue: The cup-shaped lower portion of the light assembly (which holds power supply components) can separate from the unit. These loose components have already caused minor damage by contacting the main drive shaft, and complete failure of the light assembly retention could cause further serious damage.

What operators must do:

Inspect: Check the light every 25 flight hours, starting immediately after 24 November 1983
Modify: Carry out modifications per Bell Alert Service Bulletin No. 412-83-14 before 31 December 1983
Replace: Install a safer alternative part (Whelen assembly P/No. 70285-01) before 1 March 1983

This applies to all Bell 412 model helicopters fitted with the affected strobe lights.

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Current sections

Direct links to the current provisions in AD/BELL 412/10 - Upper Anti-Collision Strobe Light P/No HR, DF-28DRMS Inspection, Modification and Replacement.

AD/BELL 412/10 - Upper Anti-Collision Strobe Light P/No HR, DF-28DRMS Inspection, Modification and Replacement

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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 Bell Helicopter Textron 412 Series Helicopters

AD/BELL 412/10 Upper Anti-Collision Strobe Light P/No HR,

DF-28DRMS Inspection, Modification and Replacement

Applicability: All 412 models fitted with subject anti-collision strobe light.

1/84

Requirement: 1. Inspect upper anticollision strobe light per Bell Alert Service Bulletin No. 412-83- 14.

2. Modify upper anti-collision strobe light per Bell Alert Service Bulletin No. 412- 83-14.

3. Replace upper anti-collision strobe light with P/No. 70285-01 Assembly (Whelen).

Compliance: For para 1. Before further flight after 24 November 1983 and thereafter at intervals not exceeding 25 hours time in service.

For para 2. Before 31 December 1983.

For para 3. Before 1 March 1983.

Background: Separation of the cup shaped lower portion of the light assembly which contains power supply components has occurred. These components have consequently contacted the main drive shaft resulting in minor damage. A potential problem exists in the retention of the entire light assembly, failure of which could cause similar damage.

Source text

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