79-05-11: Engine Power Control Loss
FAA order 79-05-11 is an airworthiness directive in force since March 15, 1979. The FAA's subject line: Engine Power Control Loss. It names Piper PA-44 Seminole: about 602 aircraft on the U.S. register today, though an order usually covers particular versions or serial numbers rather than every one. System: engine.
What it applies to as the FAA lists it
- Kind of product
- Aircraft
- Makes
- Piper Aircraft Inc.
- Models
- PA-44-180
- On this site
- Piper PA-44 Seminole 602 registered
Dates and paperwork
- In force since
- March 15, 1979
- Published
- March 8, 1979 (signed February 27, 1979)
- Docket
- Unknown
- Status
- Current
- The FAA's document
- Read the order on the FAA's site
The order itself the regulatory text, as published
Show the full text (2,213 characters)
79-05-11 PIPER AIRCRAFT CORPORATION: Amendment 39-3433. Applies to Model PA-44-180, serial numbers 44-7995001 through 44-7995144, 44-7995146 through 44-7995180, 44-7995182 through 44-7995186, 44-7995190, 44-7995192, 44-7995193, 44-7995195, and 44-7995197 airplanes certificated in all categories. \n\n\tCompliance is required within the next 10 hours' time in service after the effective date of this AD, unless already accomplished. \n\n\tTo prevent loss of engine power control due to a damaged or binding throttle control cable or restricted carburetor throttle arm movement, on both engines, accomplish the following: \n\n\t(a)\tRemove upper and lower cowling. \n\n\t(b)\tDisconnect the throttle cable at the carburetor end and inspect the throttle control cable movement for full and free travel. If the throttle control cable movement exhibits stiffness or binding, replace the cable assembly with a serviceable unit. \n\n\t(c)\tInspect the carburetor throttle arm movement for full and free travel. If the throttle arm movement exhibits stiffness or restricted movement, take the necessary corrective action. \n\n\tNOTE: Marvel-Schebler/Tillotson Service Bulletin A2-78, dated October 1978, pertains to this condition. \n\n\t(d)\tRemove both left and right engine throttle control supports, and modify the part as shown in Figure No. 1 (dimensions are in inches). Re-mark the modified part as Part No. 86574-04. \n\n\t(e)\tReinstall the modified support as shown in Figure No. 1 (dimensions are in inches). Apply torque in accordance with the Piper Maintenance Manual. \n\n\t(f)\tRe-rig the throttles in accordance with Figures No. 2 and No. 3 (dimensions are in inches). \n\n\t(g)\tReinstall upper and lower cowling. \n\n\t(h)\tAdjust the throttle quadrant gear warning micro switch in accordance with Piper's Maintenance Manual. \n\n\t(i)\tMake an appropriate maintenance record entry. \n\n\t(j)\tAn equivalent method of compliance may be approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region. \n\n\tNOTE: Piper Service Bulletin 639, dated January 10, 1979, pertains to this subject. \n\n\tThis amendment becomes effective March 15, 1979.
Related safety bulletins advice on the same designs, not orders
2021-06-29AIR-21-10 · Wing, Attach Fittings (JASC 5740)
2018-11-21SW-18-31 · NAVIGATION, ATTITUDE, AND DIRECTION DATA SYSTEM
2015-12-02CE-11-12R1 · Wings - PA-28, PA-32, PA-34, and PA-44 Rear Spar Corrosion at Fuselage Attach Fitting
2014-08-06CE-14-23 · Powerplant; Air Intake
2011-06-29CE-11-42 · Flight Controls: Control Cable/Pulley Inspections
Source: FAA Dynamic Regulatory System, airworthiness directives. The FAA's document is the authority; the register counts are this site's, from the FAA register of October 30, 2026. Connections as data: /graph/directive/79-05-11.json · aircraft systems.