| AD Number | 85-08-01 | Status | Active |
| Effective Date | April 26, 1985 | Issue Date | Not specified |
| Docket Number | Unknown | Amendment | 39-5038 |
| Product Type | ["Aircraft"] | Product Subtype | ["Rotorcraft"] |
| CFR Part | --- - Part 39 | CFR Section | N/A |
| Citation | This information is not available. | ||
| Manufacturer(s) | Airbus Helicopters Deutschland GmbH |
| Model(s) | BO-105A BO-105C BO-105S |
85-08-01 MESSERSCHMITT-BOLKOW-BLOHM GmbH: Amendment 39-5038. Applies to Model BO-105 series helicopters, S/N's S1 through S350, certificated in all categories, that are equipped with empennage P/N 105-30101.
Compliance is required within 50 hours time in service after the effective date of this AD, unless already accomplished.
To prevent cracks in the vertical fin spar and skins and possible failure of the vertical fin, accomplish the following modifications:
(a) For helicopters with S/N's S1 through S310, incorporate the tail fin modification and reinforcement specified in MBB BO-105 Service Bulletin No. 30-13, Rev. 2, dated April 24, 1978.
(b) For helicopters with S/N's S1 through S350, incorporate the gearbox mount and upper fin modification specified in MBB BO-105 Service Bulletin No. 30-18, Rev. 3, dated October 30, 1984.
(c) Aircraft may be flown in accordance with FAR Sections 21.197 and 21.199 to a base where compliance may be accomplished.
(d)Equivalent means of complying with this AD must be approved by the Manager, Aircraft Certification Office, FAA, Europe, Africa, and Middle East Office, c/o American Embassy, Brussels, Belgium.
The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part thereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive who have not already received these documents from the manufacturer may obtain copies of the service bulletins upon request to MBB Helicopter Corporation, P.O. Box 2349, West Chester, Pennsylvania 19380. The documents also may be examined at the Office of the Regional Counsel, Southwest Region, Federal Aviation Administration, 4400 Blue Mound Road, Fort Worth, Texas.
This amendment becomes effective April 26, 1985.