AD 75-05-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Whelen Engineering Company, Inc. | Strobe Light Flash Tubes | Airworthiness Directives; Whelen Engineering Company Incorporated A427 Strobe Light Flash Tubes Manufactured before November 1, 1974 |
Unsafe Condition
Possible ignition of flammable fluids or vapors by arcing at the strobe light flash tube.
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Required Actions
Install a pressure sensitive vinyl label conforming to Whelen Engineering Company Incorporated Drawing A-30052, Revision 1, or equivalent tape approved by an FAA inspector. The label or tape must cover the rivet at the rear without covering the part number and be installed when temperature is above 50°F.
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Compliance Time
within the next 100 hours time in service
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Affected Aircraft
Whelen Engineering Company, Inc. A427 strobe light flash tubes manufactured before November 1, 1974.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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