# AD 75-14-01: Hose Assemblies - Type: Airworthiness directive - Status: Current - Products: Airbus Helicopters Deutschland BO-105A and BO-105C - Superseded by: Nothing supersedes this AD - Product type: Aircraft, Rotorcraft - Amendment: 39-2245 - Registered aircraft: 4 may be affected, by airframe or engine model (OpenAirDocs) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3DA2E6F78FB7096586256E1200498743.0001 - DRS record last changed: May 30, 2024 - Page: https://openairdocs.org/ad/75-14-01 ## The airworthiness directive 75-14-01 MESSERSCHMITT BOELKOW BLOHM Gmbh.: Amendment 39-2245 as amended by Amendment 39-2277. Applies to Messerschmitt Boelkow Blohm (MBB) Model BO-105 helicopters certificated in all categories. Compliance is required as indicated. To prevent failure in service accomplish the following: (a) Before further flight, remove flexible hose assemblies having any of the following MBB or ESPA part numbers that have blue fittings marked MS24590. Replace with flexible hose assemblies of the same MBB or ESPA part number that have silver or metal colored fittings marked 12 LN 29813. MBB PART NUMBER ESPA PART NUMBER 105 - 61795 40848 - 1290 105 - 61796 40561 - 1185 105 - 61797 40561 - 820 105 - 61798 40560 - 440 105 - 62163 40558 - 415 105 - 62165 40558 - 500 105 - 61793 40561 - 355 105 - 62161 40561 - 960 105 - 62162 40561 - 1010 105 - 62169 40848 - 820 105 - 62168 40848 - 775 105 - 61792 40562 -330 -0 105 - 61791 40562 - 1125 105 - 62166 40849 - 810 105 - 62167 40849 - 865 105 - 61799 40560 - 600 105 - 61343 40848 - 250 105 - 61344 40848 - 890 105 - 90897 40556 - 350 (Replaces 105-90898) (b) Before further flight, except that the aircraft may be flown in accordance with FAR Sec.21.197 and 21.199 to a base where the work can be performed, remove flexible hose assemblies, MBB part numbers 105-61797, -61798, and -61799 that have the marking "HN-10" behind the part/drawing number or that have "ESPA HN-10" marked on the hose surface. Replace with serviceable assemblies of the same part number that do not carry the designation "HN-10" or "ESPA HN-10". (c) Before further flight, except that the aircraft may be flown in accordance with FAR Sec. 21.197 and 21.199 to a base where the work can be performed, inspect flexible hose assemblies having the following part/drawing numbers that carry the designation "HN-10" or "ESPA HN-10",for cracks in the area where the hose extrudes from the fitting. Remove and replace in accordance with the following schedule: 105 - 61795 105 - 62162 (or D133 - 1580) 105 - 61793 105 - 62169 (or D133 - 1585) 105 - 61343 (or D133 - 1577) 105 - 61344 (or D133 - 1578) (1) If cracks are found, or prior to reaching the hose assembly service life limit if no cracks are found, remove the assembly and replace with a serviceable assembly of the same part number that does not carry designation "HN-10" or "ESPA HN-10". (2) If no cracks are found, the hose assembly may be continued in service until reaching the service life limit of 100 hours total time in service provided the assembly is reinspected at intervals not to exceed 25 hours time in service or two calendar weeks, whichever occurs first. (Messerschmitt Boelkow Blohm BO-105 Alert Bulletins 10, 11, and 12 and Service Bulletin 60-14 cover this same subject.) Amendment 39-2245 was effective upon publication in the Federal Register. 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 the telegram dated June 25, 1975, which contained this amendment. ## Affected data sheets (1) (OpenAirDocs) The type certificate data sheets whose models the AD names. - [TCDS H3EU](https://openairdocs.org/tcds/H3EU): Airbus Helicopters Deutschland GmbH (AHD); names 2 of 5 models: BO-105C, BO-105A ## 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: 4 (4 by airframe model, 0 by engine model) - Makers: Messerschmitt-Boelkow-Blohm-Gm 4 Models with the most aircraft: - [Messerschmitt-Boelkow-Blohm-Gm BO-105C](https://openairdocs.org/model/messerschmitt-boelkow-blohm-gm-bo-105c): 4 aircraft (airframe model) All 1 models: https://openairdocs.org/ad/75-14-01/models.md Every aircraft: https://openairdocs.org/ad/75-14-01/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.