Spray Tank Mod Approvals Design Delegation Holders Seminar Oct 2005 by Jack Stanton Team Leader...
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Transcript of Spray Tank Mod Approvals Design Delegation Holders Seminar Oct 2005 by Jack Stanton Team Leader...
Spray Tank Mod ApprovalsSpray Tank Mod Approvals
Design Delegation Holders Seminar Oct 2005
by Jack Stanton
Team Leader Continuing Airworthiness Civil Aviation Authority
Recent Ag Helo AccidentsRecent 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
Evidence of OverloadingEvidence 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.
R22 Spray Tank DesignR22 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
Excess CapacityExcess 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
Proposed Approval Policy for Proposed Approval Policy for Agricultural Spray Systems.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.