AD 67-23-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Mooney Aviation Company Inc | M20C | Airworthiness Directives; Mooney Model M20C (Mark 21), M20D(Master), and Model M20E (Super 21) Airplanes |
| aircraft | Mooney Aviation Company Inc | M20D | Airworthiness Directives; Mooney Model M20C (Mark 21), M20D(Master), and Model M20E (Super 21) Airplanes |
| aircraft | Mooney Aviation Company Inc | M20E | Airworthiness Directives; Mooney Model M20C (Mark 21), M20D(Master), and Model M20E (Super 21) Airplanes |
Unsafe Condition
Service experience indicates that Dukes fuel pumps now in service with specific part and serial numbers may fail, necessitating replacement with redesigned pumps to ensure continued safe operation.
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Required Actions
Replace Dukes fuel pumps with redesigned models (Part Numbers 4140-00-19A or 4140-00-21A) based on serial number ranges, following Mooney Service Bulletin M20-121B. Additionally, certain models must replace mounting brackets per Service Letter 20-120.
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Compliance Time
Within the next 25 or 100 hours' time in service after April 12, 1965, or within 100 hours' time in service after the AD's effective date (September 5, 1967), depending on the fuel pump serial numbers.
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Affected Aircraft
Mooney Model M20C (Mark 21) serial numbers 2623-2737 and 2739-3198; Model M20D (Master) serial numbers 201-260; Model M20E (Super 21) serial numbers 101-850, equipped with Dukes fuel pumps.
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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