Blade Services has been repairing Westland Sea King main and tail
blades for over 15 years. The Westland metal blades are license built
copies of the Sikorsky blades. We utilize the data and parts from the
Sikorsky blades to repair the Westland versions. For an example of
pocket corrosion on Westland mfg’d blades see Information Letter 2000-1.
has converted the WD4229-00003-041 main blades to S6115-20201-3
configuration for use on the SH-3H aircraft. This involved removing all
the leading edge counterweights, re-arranging them to the proper
location, replacing any unserviceable parts and re-installing the
counterweights into the blade spar using a special built hydraulic
puller. Re-installation of the cuff assembly and the tip dam seal,
followed by helium leak detection.
Composite Main Blade WD01-29-90250
was approached to investigate how to improve the interchangeability of
the Westland Sea King composite main blade p/s WD01-29-90250-041.
The customer was experiencing difficulty in track and balance functions
when replacing a single main blade during maintenance functions and
were having to keep the blades in sets of 5 when replacing. It was also
noticed that the titanium abrasion strip was in very poor condition on
the leading edge, at the tip end.
suggested that we bond an 8’ nickel abrasion strip over the titanium
strip to protect the titanium strip from further damage during
operations. ABS sanded the existing paint off of the blade and
re-painted the blade to provide the blade with improved protection for
years to come. The blades were static balanced to specs providing
Tail Blade WD4139-00003-043
was approached to see if an extension to the 2,000 hour retirement life
was feasible for the WD4139-00003-043 tail blade installed on the Sea
King. Along with this study, was it also available to re-skin or
re-build the honeycomb blade assembly that had experienced damage to
the aluminum skin that was beyond the current repair limits. The
results were that both were practical and have since been undertaken.