AD 79-05-11

AD Final Rules - DRS_79-05-11.html
Copy URL
Print/Save as PDF
Document Versions
 Feedback
Details
AD Number:
79-05-11
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Piper Model PA-44-180 Airplanes
Subject:
Engine Power Control Loss
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
03/08/1979
Effective Date:
03/15/1979
Make:
Piper Aircraft Inc.
Model:
PA-44-180
Product Type:
Aircraft
Product Subtype:
Small Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
AIR-700: Compliance & Airworthiness Division
Office of Primary Responsibility:
AIR-720: Operational Safety Branch
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 79-05-11
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:   39-3433

AD NUMBER:   79-05-11

SUBJECT HEADING:   Airworthiness Directives; Piper Model PA-44-180 Airplanes

ACTION:  

SUMMARY:  

DATES:   Effective March 15, 1979.

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
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.

Compliance is required within the next 10 hours' time in service after the effective date of this AD, unless already accomplished.

To 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:

(a) Remove upper and lower cowling.

(b) Disconnect 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.

(c) Inspect 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.

NOTE: Marvel-Schebler/Tillotson Service Bulletin A2-78, dated October 1978, pertains to this condition.

(d) Remove 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.

(e) Reinstall the modified support as shown in Figure No. 1 (dimensions are in inches). Apply torque in accordance with the Piper Maintenance Manual.

(f) Re-rig the throttles in accordance with Figures No. 2 and No. 3 (dimensions are in inches).

(g) Reinstall upper and lower cowling.

(h) Adjust the throttle quadrant gear warning micro switch in accordance with Piper's Maintenance Manual.

(i) Make an appropriate maintenance record entry.

(j) An equivalent method of compliance may be approved by the Chief, Engineering and Manufacturing Branch, Federal Aviation Administration, Southern Region.

NOTE: Piper Service Bulletin 639, dated January 10, 1979, pertains to this subject.

This amendment becomes effective March 15, 1979.









FOOTER: