Commonwealth legislation

AD/GENERAL/50 - Whelen Strobe Light - Modification

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Commonwealth

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legislative instrument

Plain English Summary

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This Airworthiness Directive orders a simple physical modification to Whelen A427 strobe flash tubes made before 1 November 1974: fit a pressure‑sensitive vinyl label (per Whelen Drawing A‑300052 Rev 1) or use a strip of Scotch Type 33 vinyl electrical tape so the rear rivet is covered but the part number remains visible. Installation must be done at temperatures above 10°C and within 100 hours time in service after 30 May 1975. It applies to owners/operators of aircraft fitted with those flash tubes.

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AD/GENERAL/50 - Whelen Strobe Light - Modification

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Aircraft - General

AD/GENERAL/50 Whelen Strobe Light - Modification 4/75

Applicability: All aircraft equipped with Whelen A427 strobe light flash tubes manufactured before 1 November 1974.

Requirement: Install on the base of Whelen Engineering Company Incorporated A427 strobe light flash tubes a pressure sensitive-vinyl label conforming to Whelen Engineering Company Incorporated Drawing A-300052, Revision 1, dated October 15, 1974, or a strip of Scotch Brand Type 33 vinyl plastic electrical tape can be used in lieu of the vinyl label. If the vinyl plastic electrical tape is used, it must be formed to cover the rivet at the rear of the flash tube without covering the identifying part number. If the flash tube incorporates a label, the new label or tape may be installed directly over the old label.

Note: To ensure proper adhesion install the label or tape only when the label or tape and the flash tube are at a temperature above 10 degrees C.

Compliance: Within the next 100 hours time in service after 30 May 1975.

Source text

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

1 AD/GENERAL/50 - Whelen Strobe Light - Modification