AD 2004-24-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bombardier | Various | Airworthiness Directives; Bombardier, Inc. Model DHC-3 Airplanes |
Unsafe Condition
Wiring installed according to an incorrect drawing, which shows the pneumatic heating blankets to the P<INF>3</INF> and P<INF>Y</INF> pneumatic lines wired in series with the indicator lights, rather than parallel. This can result in insufficient electrical energy for the heating blankets and loss of pneumatic heating.
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Required Actions
Inspect the electrical wiring to the P3 and PY engine pneumatic line heating blankets and the P3 heater warning light to determine if they are wired in parallel. Replace the circuit breaker switch as applicable. Replace the flight manual supplement currently in use with Revision G, dated March 28, 2001.
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Compliance Time
Within 4 months after January 6, 2005, or 300 hours time in service, whichever occurs first.
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Affected Aircraft
Bombardier, Inc. Model DHC-3 airplanes, all serial numbers, modified with Supplemental Type Certificate (STC) number SA3777NM, and certificated in any category.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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