# AD 86-19-15 R1: Main Rotor Head Sleeves - Type: Airworthiness directive - Status: Current - Products: Airbus Helicopters AS355E, AS355F, AS355F1, AS350B, AS350C, AS350D and AS350D1 - Effective: December 18, 1986 - Published: December 1, 1986 - Issued: November 17, 1986 - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Rotorcraft - Amendment: 39-5470 - Registered aircraft: 35 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E51D97C8977F8F6286256A4E0049C4A1.0001 - DRS record last changed: November 21, 2025 - Page: https://openairdocs.org/ad/86-19-15-R1 ## The airworthiness directive 86-19-15 R1 SOCIETE NATIONALE INDUSTRIELLE AEROSPATIALE (SNIAS): Amendment 39-5470. Applies to Aerospatiale Model AS 350 and AS 355 series helicopters, certificated in any category. Compliance is required as indicted unless already accomplished. To prevent failure of the main rotor head sleeves, accomplish the following: (a) For AS 350B and AS 350D helicopters, accomplish the following: (1) Within the next 100 hours' time in service after the effective date of this AD, replace, with serviceable parts, those main rotor head sleeves (Part Numbers (P/N) 350A31.1831.00, .01, .04, .05, .06, and .07) which have 3,900 or more hours' time in service. (2) For those main rotor head sleeves having less than 3,900 hours' time in service on the effective date of this AD, replace with serviceable parts before 4,000 hours' time in service. (b) For AS 355 series helicopters, accomplish the following: (1) Within the next 100 hours' time in service after the effective date of this AD, replace, with serviceable parts, those main rotor head sleeves (P/N's 350A31.1831.04, .05, .06, and .07) which have 1,400 or more hours' time in service. (2) For those main rotor head sleeves having less than 1,400 hours' time in service after the effective date of this AD, replace with serviceable parts before 1,500 hours' time in service. (c) In the event of sudden or repeated occurrence of a severe tracking defect, accomplish the following before the next flight: (1) Remove blades and visually check to determine if outboard sleeve bushes are separated; and (2) If bush separation is found, remove and replace sleeves. (d) An alternate method of compliance with this AD, which provides an equivalent level of safety, may be used when approved by the Manager, Aircraft Certification Division, Federal Aviation Administration, P.O. Box 1689, Fort Worth, Texas 76101, or by the Manager, Aircraft Certification Office, AEU-100, FAA, Europe, Africa, and Middle East Office, c/o American Embassy, Brussels, Belgium. (e) In accordance with FAR sections 21.197 and 21.199, flight is permitted to a base where the maintenance required by this AD may be accomplished. NOTE: Aerospatiale Telex Services 01.13 and 01.16 and French AD's 86-35-28(B) and 86-57-44(B) pertain to this subject. This amendment becomes effective December 18, 1986, as to all persons except those persons to whom it was made immediately effective by priority letter AD 86-19-15 issued September 24, 1986, which contained this amendment. ## Affected data sheets (2) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS H9EU](https://openairdocs.org/tcds/H9EU): Airbus Helicopters; names 4 of 10 models: AS350C, AS350B, AS350D1, AS350D - [TCDS H11EU](https://openairdocs.org/tcds/H11EU): Airbus Helicopters; names 3 of 6 models: AS355F1, AS355E, AS355F ## Registered aircraft it may apply to (OpenAirDocs) Matched by airframe and engine model; the AD's applicability may narrow it by serial number, part number or equipment. - Aircraft: 35 (35 by airframe model, 0 by engine model) - Makers: Aerospatiale 25, S N I A S 7, Airbus Helicopter 1, Eurocopter 1, Eurocopter France 1 Models with the most aircraft: - [Aerospatiale AS350B](https://openairdocs.org/model/aerospatiale-as350b): 13 aircraft (airframe model) - [Aerospatiale AS 355F1](https://openairdocs.org/model/aerospatiale-as-355f1): 9 aircraft (airframe model) - [S N I A S AS-350B ECUREUIL](https://openairdocs.org/model/s-n-i-a-s-as-350b-ecureuil): 5 aircraft (airframe model) - [Aerospatiale AS355F TWINSTAR](https://openairdocs.org/model/aerospatiale-as355f-twinstar): 2 aircraft (airframe model) - [S N I A S AS350D ASTAR](https://openairdocs.org/model/s-n-i-a-s-as350d-astar): 1 aircraft (airframe model) - [Aerospatiale AS-355E TWIN STAR](https://openairdocs.org/model/aerospatiale-as-355e-twin-star): 1 aircraft (airframe model) - [Airbus Helicopter AS355F1](https://openairdocs.org/model/airbus-helicopter-as355f1): 1 aircraft (airframe model) - [S N I A S AS 355F](https://openairdocs.org/model/s-n-i-a-s-as-355f): 1 aircraft (airframe model) - [Eurocopter AS350B](https://openairdocs.org/model/eurocopter-as350b): 1 aircraft (airframe model) - [Eurocopter France AS350B](https://openairdocs.org/model/eurocopter-france-as350b): 1 aircraft (airframe model) All 10 models: https://openairdocs.org/ad/86-19-15-R1/models.md Every aircraft: https://openairdocs.org/ad/86-19-15-R1/aircraft.md Its text cites no advisory circulars or STCs. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.