1 / 12

Spray Tank Mod Approvals

Spray Tank Mod Approvals. Design Delegation Holders Seminar Oct 2005 by Jack Stanton Team Leader Continuing Airworthiness Civil Aviation Authority. Recent Ag Helo Accidents. ZK-HSF UH-1 23 April 04 ZK-HWP R22 Nov 2004 Incidents: June 2005 R44 Hook Failure

benjamin
Télécharger la présentation

Spray Tank Mod Approvals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Spray Tank Mod Approvals Design Delegation Holders Seminar Oct 2005 by Jack Stanton Team Leader Continuing Airworthiness Civil Aviation Authority

  2. Recent Ag Helo Accidents • ZK-HSF UH-1 23 April 04 • ZK-HWP R22 Nov 2004 • Incidents: • June 2005 R44 Hook Failure • Sept 2005 R44 Hook Cracking

  3. Evidence of Overloading • ZK-HSF UH-1 on Spraying operations, accident investigation revealed Tension Torsion strap failed due previous main rotor overspeed. • ZK-HWP R22 Main Rotor Blade failed in Fatigue at 700hrs TSN, Nill corrosion. Repeated operation beyond rated limit.

  4. ZK-HWP Near Taumaranui

  5. Failed Blade Root

  6. Fracture Surface

  7. Fatigue Origin From Bolt Hole

  8. Fatigue Origin

  9. R22 Spray Tank Design Empty Weight 880 lbs • Pilot 170 lbs • 30 min Fuel 23 lbs • Spray Gear 90lbs • MAUW 1370 lbs Available payload 207 lbs (max) • Volume of Water 94 litres

  10. Excess Capacity • Available payload 94 Litres • Typical Tank Capacity 200 litres (100/side) • Survey of 17 R22 operators; • 3 OK, 11 overloaded, 3 wouldn’t say

  11. Proposed Approval Policy for Agricultural Spray Systems. • The tank capacity is not to exceed 105% of the volume of water that could be carried within MAUW and C of G limits for the aircraft in condition ready for flight with fuel reserves meeting CAR 91.305 and crew onboard.

  12. CAA Design Notices • Possible means of promulgating CAA Policy • ACU to issue as required • As proposed by DDHs

More Related