AD 75-24-14

75-24-14 SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE: Amendment 39- 2440. Applies to Alouette Helicopters SE-3130, SE-313B, SA-315B, SE-3160, SA-316B, SA- 316C, SA-3180, SA-318B, SA-318C, and SA-319B equipped with main rotor hydraulic dampers P/N 3130S.13.60.000.

Compliance is required as indicated, unless already accomplished.

To prevent excessive vibration or ground resonance, accomplish the following:

(a) Prior to October 30, 1975, modify and reidentify main rotor hydraulic dampers P/N 3130S.13.60.000 in accordance with subparagraphs 2B(1), 2B(2), and 2(c) of Lama Service Bulletin No. 65.20 dated July 4, 1975, for Model SA-315B and Alouette Service Bulletin No. 65.107 dated July 4, 1975, for the other designated models, or equivalents approved by the Chief, Aircraft Certification Staff, FAA, Europe, Africa, and Middle East Region, c/o American Embassy, APO New York, New York, N.Y. 09667.

(b) Prior to further flight, for Models SA-3160, SA-316B, SA-316C, andSA-319B, remove the placard required by AD 75-17-30, if installed, and install a temporary placard on the instrument panel, in full view of the pilot, reading as follows: "Maximum density altitude: 8200 feet". Temporary placard may be removed upon accomplishment of paragraph (a) of this AD.

(Alouette Service Bulletin No. 01.39 also refers to paragraph (b) of this AD).

This AD supersedes Amendment 39-2335 (40 FR 33010), AD 75-17-30.

This amendment is effective upon publication in the FEDERAL REGISTER as to all persons except those persons to whom it was made immediately effective by telegram dated September 30, 1975, which contained this amendment.