AD 72-06-05 R2
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Marvel-Schebler Products Division | Carburetors | Airworthiness Directives; MARVEL SCHEBLER (Facet Aerospace Products Company): Applies to Models MA-3, MA-3A, MA3-PA, MA-3SPA, MA4-SPA, MA4-5, MA4-5AA, MA-5, MA-5AA, MA-6AA and HA-6 Carburetors |
Unsafe Condition
Looseness or separation of the throttle arm from the throttle stop due to improper positioning, clamping screw type, or insufficient torque leading to potential loss of engine control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and reposition the throttle arm to ensure it is bottomed against the shoulder on the throttle stop and achieves full throttle travel. Replace throttle arms with milled flats with those having spotfaced flats and install specified clamping screws (Marvel Schebler P/N A15-493) torqued to 20-28 or 35-40 in.-lb as applicable. Safety wire the throttle arm and clamping screw to the throttle stop according to specified illustrations. Equivalent procedures from approved service letters or bulletins may be used.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 30 days after the effective date of the AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Marvel-Schebler carburetors Models MA-3, MA-3A, MA3-PA, MA-3SPA, MA4-SPA, MA4-5, MA4-5AA, MA-5, MA-5AA, MA-6AA, and HA-6 used on Franklin, Continental, Lycoming, or Ranger engines with one of Illustrations A, B, C, or D.
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.