62-03-02 LYCOMING: Amdt. 394 Part 507 Federal Register January 26, 1962. Applies to All VO-540 Series Engines.
Compliance required as indicated.
To preclude failures of the hydraulic valve tappet body and plunger assembly, an improved hydraulic tappet body and plunger assembly has been provided.
Unless already incorporated, install a Lycoming P/N 72876 plunger assembly and a Lycoming P/N 73061 tappet body at the next engine overhaul after the effective date of this AD.
(Lycoming Service Instruction No. 1011 covers this same subject.)
This directive effective February 27, 1962.