AD 69-23-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Dowty Propellers | (c) R130/4-20-4/ | DOWTY ROTOL Models (c) R.130/4-20 - 4/12E, (c) R.148/4-20 - 4/21E, (c) R.186/4-30 - 4/16, and (c) R.175/4-30 - 4/13E Propellers |
| aircraft | Dowty Propellers | (c) R148/4-20-4/ | DOWTY ROTOL Models (c) R.130/4-20 - 4/12E, (c) R.148/4-20 - 4/21E, (c) R.186/4-30 - 4/16, and (c) R.175/4-30 - 4/13E Propellers |
| aircraft | Dowty Propellers | (c) R175/4-30-4/ | DOWTY ROTOL Models (c) R.130/4-20 - 4/12E, (c) R.148/4-20 - 4/21E, (c) R.186/4-30 - 4/16, and (c) R.175/4-30 - 4/13E Propellers |
| aircraft | Dowty Propellers | (c) R186/4-30-4/ | DOWTY ROTOL Models (c) R.130/4-20 - 4/12E, (c) R.148/4-20 - 4/21E, (c) R.186/4-30 - 4/16, and (c) R.175/4-30 - 4/13E Propellers |
Unsafe Condition
Failure of propeller cylinders due to insufficient strength or fatigue.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Incorporate Dowty Rotol Modification No. (c) VP.2480 in accordance with Service Bulletin No. 61-564, Revision 4, or later ARB-approved issue, or FAA-approved equivalent.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next scheduled propeller overhaul after the effective date of this AD, or before the cylinder accumulates 6,000 hours total time in service, whichever occurs later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Dowty Rotol propellers with propeller cylinder P/N's RA 44133/1, RA 44709, RA 62807, or RA 67888, except those modified by Modification No. (c) VP.2422: (c) R.130/4-20 - 4/12E on Vickers Viscount Model 745D; (c) R.148/4-20 - 4/21E on Viscount Model 744; (c) R.186/4-30 - 4/16 on Hawker Siddeley Argosy AW-650; and (c) R.175/4-30 - 4/13E on Fairchild F.27 and F.27B aircraft.
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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