AD 57-09-01

AD Final Rules - DRS_57-09-01.html
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AD Number:
57-09-01
Document Type:
AD Final Rules
Docket Number:
Unknown
Subject Heading:
Airworthiness Directives; Aero Commander Model 520 560, 560A and 680 Aircraft
Subject:
Aileron Bellcrank Casting
Status:
Current
Citation:
This information is not available.
Citation Publish Date:
Effective Date:
Make:
Twin Commander Aircraft LLC
Model:
520 | 560 | 560-A | 680
Product Type:
Aircraft
Product Subtype:
Small Airplane
Affected AD:
Superseded AD:
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
AIRWORTHINESS DIRECTIVES FINAL RULES: 57-09-01
CITATION:   This information is not available.

PAGE NUMBER:  

DOCKET NUMBER:   Unknown

AMENDMENT:  

AD NUMBER:   57-09-01

SUBJECT HEADING:   Airworthiness Directives; Aero Commander Model 520 560, 560A and 680 Aircraft

ACTION:  

SUMMARY:  

DATES:  

ADDRESSES:  

FOR FURTHER INFORMATION CONTACT:  

SUPPLEMENTARY INFORMATION:  

REGULATORY TEXT:  
57-09-01 AERO COMMANDER: Applies to All Model 520 Aircraft, Serial Numbers 31 and Above, and to All Models 560, 560A and 680 Aircraft.

Compliance required not later than the next 3 hours of flight or May 15, 1957, whichever occurs first and at 100-hour intervals thereafter.

As a result of finding cracks in the aileron bellcrank casting in the vicinity of the aileron push-pull rod attach bolt, the following action is considered necessary unless already accomplished.

Inspect, using dye penetrant or fluorescent methods, all aileron bellcrank castings P/N 3510005 on bellcrank assembly P/N 4510004-401 and 402 for cracks in upper or lower lugs to which the aileron push-pull rod attaches. Remove rod to make the inspection, replace all castings found defective and reattach push-pull rod, making certain no clearance exists between casting lugs and rod-end bearing inner race before tightening bolt. Use shim washers to eliminate clearance. The 100-hour reinspection of casing P/N 3510005 may be discontinued upon installation of revised casting under development by Aero Design. (Aero Design Service Bulletin No. 41, dated April 19, 1957, provides a sketch of the part and defines the area to be inspected.)

This AD covers the same inspection required by CAA telegraphic instructions dated April 25, 1957.

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