An aviation researcher, writer, aviation participant, pilot & agricultural researcher. Author of over 35 scientific publications world wide.


Good reads

Oil Prices


R22/R44 Ops Info

Robinson R22 and R44 Helicopters

Latest AD from CASA:

The AD just released which has resulted in a grounding of all R44 helicopters not fitted with the bladder tanks.

Operating Helicopters:

The following is a summary of important operating instructions for R22 and R44 helicopters:

1. Fuel Tank AWB

AWB – 012

Fuel Tank SB

r44sb-78    and rebate offer:

rhcsn-38 r44sb-78 r44_fuel_bladder_rebate_offer

The report from Jasper’s brush said in part:

On 20 December 2010, the manufacturer issued R44 Service Bulletin 78 (SB 78) requiring that R44 helicopters with all- aluminium fuel tanks be retrofitted with bladder-type fuel tanks as soon as practical, but no later than 31 December 2014. At the time of the accident, about 90% of the helicopters originally fitted with all- aluminium fuel tanks, including VH-COK, had not been retrofitted. On 21 February 2012, the manufacturer issued SB 78A that revised the date of compliance to 31 December 2013.

The report is at:

Jasper’s Brush – ao-2012-021_prelim1

and the Cessnock Report, where the original identification of the R44 aluminium tanks issue was identified by ATSB. This, despite the later R-44 at Jasper’s Brush was never moved to an AWB or an AD until late 2012 by CASA.

 Cessnock- ao-2011-016_final cessnock 4th February 2011

2. Operating Instructions for R22 and R44 helicopters:

10, 24 and 29 refer to decaying rotor speeds and effects. SN-34 refers to low speed LTE [Loss Tail Rotor Effectiveness]