AD 70-01-06

70-01-06 HUGHES: Amdt. 39-921. Applies to Model 269A, 269A-1, 269A-2 and 269B helicopters certificated in all categories with P/N 269A7506 lateral pitch mixer idler bellcrank assembly installed.

To insure continued airworthiness of Hughes Model 269A, 269A-1, 269A-2 and 269B helicopters, with P/N 269A7506 lateral pitch mixer idler bellcrank assembly installed, accomplish the following:

(a) For helicopters equipped with P/N 269A7506 bellcrank assembly having less than 875 hours time in service on the effective date of this AD, remove from service P/N 269A7506 lateral pitch mixer idler bellcrank assembly prior to the accumulation of 900 hours time in service, and mark it permanently and conspicuously to prevent its inadvertent return to service. Replace it with a serviceable P/N 269A7506 or P/N 269A7508 lateral pitch mixer idler bellcrank assembly.

(b) For helicopters equipped with P/N 269A7506 bellcrank assembly having 875 or more hours' time in service on the effective date of this AD, remove from service P/N 269A7506 lateral pitch mixer idler bellcrank assembly prior to the accumulation of 25 additional hours time in service, and mark it permanently and conspicuously to prevent its inadvertent return to service. Replace it with a serviceable P/N 269A7506 or P/N 269A7508 lateral pitch mixer idler bellcrank assembly.

This amendment becomes effective January 17, 1970.