AD 76-18-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Dowty Propellers | (c) R184/4-30-4/ | DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers |
| aircraft | Dowty Propellers | (c) R193/4-30-4/ | DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers |
| aircraft | Dowty Propellers | (c) R257/4-30-4/ | DOWTY ROTOL Models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 Propellers |
Unsafe Condition
Cracking and possible failure of the hub driving center due to improper machining.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Re-work the hub driving center to salvage scheme No. 640144000 for listed serial numbers. Inspect and rework if incorrectly machined for unlisted serial numbers, following Service Bulletin 61-858 or approved equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next propeller overhaul or within the next 4700 hours propeller time in service after the effective date of this AD, whichever occurs first.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Dowty Propellers models (c)R193/4-30-4/50, (c)R257/4-30-4/60, and (c)R184/4-30-4/50 with Hub Driving Centers P/N 601026638 modified to Mod. No. (c)VP2486.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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