AD 74-07-02

74-07-02 HUGHES: Amendment 39-1802. Applies to Hughes Models 369A, 369H, 369HE, 369HS and 369HM Helicopters certificated in all categories.

"Pursuant to the authority of the Federal Aviation Act of 1958, delegated to me by the Administrator, the following airworthiness directive applicable to operators of Hughes Model 369A, 369H, 369HE, 369HS and 369HM Helicopters, equipped with aluminum tail rotor blade P/N 369A1613-3, certificated in all categories is effective immediately upon receipt of this airmail letter. Before further flight, unless already accomplished, and upon any installation or replacement of aluminum tail rotor blade P/N 369A1613-3, inspect the tail rotor assembly to verify that the rotor blade P/N 369A1613-3 serial numbers 0001 through 0156 are not mated with blade serial numbers 0157 and subsequent. Replace mismatched tail rotor blade(s) before further flight. Note AD inspection in Aircraft Maintenance Records. Forthcoming Service Bulletin, No. HN-65 covers the same subject."

This amendment is effective March 26, 1974 for all persons except those to whom it was made effective by airmail letter, dated February 25, 1974, which contained this amendment.