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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
Amendment 39-4404; AD 80-19-12 R1
Airworthiness Directives; Beech Model 76 Airplanes
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Preamble Information
AGENCY: Federal Aviation Administration, DOT
DATES: Effective June 14, 1982.
Regulatory Information
80-19-12 R1 BEECH: Amendment 39-3916 as amended by Amendment 39-4404. Applies to Model 76 (Serial Numbers ME-1 through ME-415) airplanes certificated in any category, that have 100 hours or more time-in-service.
COMPLIANCE: Required as indicated unless already accomplished.
To ensure the integrity of the engine mount structure, accomplish the following:
A) Within the next 50 hours time-in-service after the effective date of this AD and thereafter at intervals not to exceed 100 hours time-in-service, accomplish the following:
1. Remove the engine cowlings in accordance with instructions in the Aircraft Manufacturer's Maintenance Manual.
2. Perform a dye penetrant inspection of the two lower tubes of each engine mount assembly which extend from the firewall to the lower engine-mounting pads in accordance with FAA Advisory Circular AC 43.13-1A, paying particular attention to the area just aft of the gusset on the forward end of the tubes.
NOTE: Thoroughly clean and degrease the area to be inspected; however, it is not necessary to remove the paint.
B) Each 50 hours time-in-service after the dye penetrant inspections required by Paragraph A), visually inspect the same areas of the lower engine mount tubes.
C) Prior to further flight, repair any cracks detected in the engine mount lower tubes as a result of any inspection required by this AD. Contact the Sales and Service Department, Beech Aircraft Corporation, Liberal, Kansas 67901, telephone (316) 624-1613, for repair instructions.
D) The time-in-service for the inspections required herein may be adjusted up to 10 hours to facilitate accomplishing the inspections concurrent with other scheduled maintenance on the airplane.
E) The repetitive inspections required by paragraphs A) and B) of this AD may be discontinued when engine mount assemblies are replaced with P/N 105-910019-1 engine mount assemblies in accordance with Beechcraft Service Instructions No. 1147, Revision 1.
F) Any equivalent means of compliance with this AD must be approved by the Chief, Aircraft Certification Program, Federal Aviation Administration, Room 238, Terminal Building 2299, Mid-Continent Airport, Wichita, Kansas 67209, telephone (316) 942-4285.
Amendment 39-3916 became effective September 25, 1980.
This Amendment 39-4404 becomes effective on June 14, 1982.
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