AD 80-22-11

80-22-11 BELL: Amendment 39-3950. Applies to Model 206 L-1 helicopters, certificated in all categories (Airworthiness Docket No. 80-ASW-44).

Compliance required as indicated.

To prevent possible fatigue failure of the main rotor grip, P/N 206-011-132-009, remove and replace as specified below, the main rotor grips having serial numbers: A1-00001, A1-00004 through A1-00007, A1-00009, A1-00010, A1-00014, A1-00016, A1-00017, A1-00019, A1-00021 through A1-00024, A1-00027 through A1-00029, A1-00031 through A1-00036, A1-00038 through A1-00040, A1-00042 through A1-00044, A1-00046 through A1-00050, A1-00053 through A1-00057, A1-00059, A1-00061, A1-00062, A1-00064, A1-00066 through A1-00068, A1-00071, A1-00073 through A1-00075, A1-00077, A1-00078, A1-00080, A1-00083 through A1-00093, A1-00095, A1-00096, A1-00098 through A1-00101, A1-00103 through A1-00106, A1-00111, A1-00113, A1-00115, A1-00116, A1-00118 through A1-00120, A1-00124, A1-00130 through A1-00136, A1-00192, A1-00222,A1-00248, A1- 00287, A1-00300, A1-00305, and A1-00308.

a. Replace those grips with less than 1,150 hours' total time in service on the effective date of this AD, prior to accumulating 1,200 hours' total time in service.

b. Replace those grips with 1,150 or more hours' total time in service on the effective date of this AD, within 50 hours' time in service.

c. Compliance with Bell Helicopter Textron Alert Service Bulletin 206L-80-15, dated July 29, 1980, fulfills compliance with this AD.

d. The retirement time of those main rotor grips specified above is reduced from 4,800 hours to 1,200 hours by this AD.

e. The helicopter may be flown in accordance with FAR 21.197 to a base where repairs can be performed.

This amendment becomes effective October 27, 1980.