AD 94-05-05 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Continental Motors | Teledyne Continental Motors | C-125-1 | TELEDYNE CONTINENTAL ENGINES AND ROLLS-ROYCE, PLC Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 Series and Rolls-Royce, plc (R-R) C90, O-200 and O-300 Series Engines |
| engine | Continental Motors | Teledyne Continental Motors | C-125-2 | TELEDYNE CONTINENTAL ENGINES AND ROLLS-ROYCE, PLC Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 Series and Rolls-Royce, plc (R-R) C90, O-200 and O-300 Series Engines |
| engine | Continental Motors | Teledyne Continental Motors | C145-2 | TELEDYNE CONTINENTAL ENGINES AND ROLLS-ROYCE, PLC Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 Series and Rolls-Royce, plc (R-R) C90, O-200 and O-300 Series Engines |
| engine | Continental Motors | Teledyne Continental Motors | C145-2H | TELEDYNE CONTINENTAL ENGINES AND ROLLS-ROYCE, PLC Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 Series and Rolls-Royce, plc (R-R) C90, O-200 and O-300 Series Engines |
| engine | Continental Motors | Teledyne Continental Motors | C145-2HP | TELEDYNE CONTINENTAL ENGINES AND ROLLS-ROYCE, PLC Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 Series and Rolls-Royce, plc (R-R) C90, O-200 and O-300 Series Engines |
| engine | Continental Motors | Teledyne Continental Motors | C90-12F | TELEDYNE CONTINENTAL ENGINES AND ROLLS-ROYCE, PLC Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 Series and Rolls-Royce, plc (R-R) C90, O-200 and O-300 Series Engines |
| engine | Continental Motors | Teledyne Continental Motors | C90-12FH | TELEDYNE CONTINENTAL ENGINES AND ROLLS-ROYCE, PLC Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 Series and Rolls-Royce, plc (R-R) C90, O-200 and O-300 Series Engines |
| engine | Continental Motors | Teledyne Continental Motors | C90-12FJ | TELEDYNE CONTINENTAL ENGINES AND ROLLS-ROYCE, PLC Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 Series and Rolls-Royce, plc (R-R) C90, O-200 and O-300 Series Engines |
| engine | Continental Motors | Teledyne Continental Motors | C90-12FP | TELEDYNE CONTINENTAL ENGINES AND ROLLS-ROYCE, PLC Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 Series and Rolls-Royce, plc (R-R) C90, O-200 and O-300 Series Engines |
| engine | Continental Motors | Teledyne Continental Motors | C90-14F | TELEDYNE CONTINENTAL ENGINES AND ROLLS-ROYCE, PLC Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 Series and Rolls-Royce, plc (R-R) C90, O-200 and O-300 Series Engines |
Unsafe Condition
Cylinder rocker shaft bosses may develop cracks, leading to engine power loss and engine failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
At the next cylinder removal from the engine or engine overhaul, whichever occurs first, inspect the cylinder rocker shaft bosses for cracks using fluorescent or dye penetrant inspection methods. If cracks are found, replace with a serviceable cylinder.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
At the next cylinder removal from the engine or engine overhaul, whichever occurs first, after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Teledyne Continental Motors (TCM) and Rolls-Royce, plc (R-R) Model C75, C85, C90, C125, C145, O-200, O-300, and GO-300 series engines installed on specified aircraft models including American Champion, Cessna, Luscombe, Maule, Piper, Reims Aviation SA, Swift, Univair (Erco), Univair (Forney), Univair (Alon), and Univair (Mooney) models.
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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