CTHIn ForceLegislation
AD/JBK 117/33 - Long Drive Shaft Rivets
Kawasaki BK 117 Series HelicoptersKawasaki BK 117 Series Helicopters
Start here
Get a plain-English read of Kawasaki BK 117 Series Helicopters
Turn the raw legal text into a practical explanation grounded in AD/JBK 117/33 - Long Drive Shaft Rivets.
Kawasaki BK 117 Series Helicopters
| AD/JBK 117/33 | Long Drive Shaft Rivets | 11/2009 DM |
|---|
| Applicability: | Kawasaki BK 117 C-2 helicopters. |
|---|---|
| Requirement: | 1. Inspect the long T/R drive shaft in accordance with the instructions of Kawasaki Service Bulletin (SB) No. KSB-117-306 dated 16 June May 2009 or later JCAB approved revision.2. If, during the inspection detailed in Requirement 1 of this AD, blind rivets are found to be installed on the long T/R drive shaft, replace the affected T/R drive shaft assembly with a serviceable unit in accordance with the instructions of SB No. KSB-117-306 or later JCAB approved revision.3. Do not repair any long T/R drive shaft in accordance with the instructions of Aircraft Maintenance Manual (AMM) Chapter 65-11-00, 8-3; andDo not install on a helicopter any long T/R drive shaft that has been repaired in accordance with AMM Chapter 65-11-00, 8-3.Note: Japan Civil Aviation Bureau (JCAB) AD No. TCD-7496-2009 dated1 July 2009 refers. |
| Compliance: | For Requirements 1 and 2 - Before further flight after the effective date of this AD.For Requirement 3 - From the effective date of this AD. |
| This Airworthiness Directive becomes effective on 1 September 2009. | |
| Background: | During a recent review of the Aircraft Maintenance Manual it was discovered that this document erroneously allowed the replacement of the solid rivets on the long T/R drive shaft with blind rivets.This condition, if not corrected, could lead to a significant reduction of the lifetime of the long T/R drive shaft, potentially resulting in failure of the T/R drive shaft and consequent loss of control of the helicopter. |
| This AD requires a one-time inspection of all long T/R drive shafts to verify that correct (solid) rivets are installed and, if blind rivets are found, the replacement of the T/R drive shaft assembly. In addition, this AD prohibits any further application of the erroneous AMM (which will be revised) repair instructions for long T/R drive shafts. |
|---|
Image unavailable in extracted text
James Coyne
Delegate of the Civil Aviation Safety Authority
19 August 2009