AD 2003-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney | Canada Models PW118 | Airworthiness Directives; Pratt & Whitney Canada Models PW118, PW120, PW120A, and PW121 Turboprop Engines |
Unsafe Condition
A fire in the engine intercompressor case (ICC) could cause the existing tubes to disengage due to melted brazing on the tubes. Once these tubes disengage, the ICC fire then develops into an external fire within the engine nacelle cavity.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace the low pressure rotor speed (NL) sensor port sealing tube with an improved durability tube. Remove the switching valve-to-rear inlet case sealing air tube assembly and either install an improved durability tube assembly or rework and reinstall the existing tube assembly.
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Compliance Time
At the next engine shop visit, or within 90 days after the effective date of this AD, whichever occurs first.
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Affected Aircraft
Pratt & Whitney Canada models PW118, PW120, PW120A, and PW121 turboprop engines installed on, but not limited to, EMBRAER EMB-120RT, 120ER, and 120FC, Bombardier Inc. DHC-8-100 series, and Aerospatiale ATR 42-200, -300, and -320 airplanes.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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