AD 72-23-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-10 | ROLLS ROYCE (1971) LTD Models 542-4, -4K, -10, -10J, and -10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-10J | ROLLS ROYCE (1971) LTD Models 542-4, -4K, -10, -10J, and -10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-10K | ROLLS ROYCE (1971) LTD Models 542-4, -4K, -10, -10J, and -10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-4 | ROLLS ROYCE (1971) LTD Models 542-4, -4K, -10, -10J, and -10K Engines |
| engine | Rolls-Royce Deutschland Ltd & Co KG | Dart 542-4K | ROLLS ROYCE (1971) LTD Models 542-4, -4K, -10, -10J, and -10K Engines |
Unsafe Condition
Damage to the rear face of the first stage impeller that could lead to impeller disintegration in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Modify the oil drain plug (P/N RK.35189) to P/N RK.46404 per Rolls Royce Service Bulletin DA 72-383 Rev 1 within 300 flights after the AD effective date or before 2,000 flights on the compressor since new/overhaul, whichever is later. Conduct visual inspections for aluminum particles on the drain plug every 300 flights post-modification. Inspect oil filters and engine rotation for aluminum dust or unusual noises, and if found, remove a combustion chamber to inspect for metal spatter/damage per paragraph (e).
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 300 flights after the effective date of this AD, or before the accumulation of 2,000 flights on the compressor since installed new or since last compressor overhaul, as applicable, whichever occurs later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Rolls-Royce Deutschland Ltd & Co KG Dart 542-4, -4K, -10, -10J, and -10K engines installed on Convair 340/440 (also known as Convair 600/640) and NAMC YS-11/YS-11A airplanes.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.