AD 2017-24-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Fokker | Services B | Airworthiness Directives; Fokker Services B.V. Airplanes |
Unsafe Condition
Exit signs installed on Fokker Services B.V. Model F.27 airplanes, powered by a hydrogen isotope (Tritium), decay over time, causing the signs to lose brightness.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Contact the FAA to obtain instructions for addressing the unsafe condition and perform the actions specified in those instructions, which may include replacing Tritium-powered exit signs with either photo-luminescent or Tritium-powered signs, introducing a life limit for Tritium signs, and revising the maintenance program for photo-luminescent signs.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the time specified in the instructions obtained from the FAA.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Fokker Services B.V. Model F.27 airplanes, certificated in any category, serial numbers 10425 through 10692 inclusive.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.