Robinson Helicopter issued a Service Bulletin (SB-109) requiring retrofit installation of fuel bladders in all R22s through S/N 4620 “as soon as practical,” but no later than the next 2,200-hour overhaul or 12-year inspection. It began installing fuel bladders in new-production R22s early last year beginning with S/N 4622.
The FAA has issued an emergency AD on Bombardier CRJ700s that limits center-tank fuel quantity to 1,500 pounds at takeoff and flight paths to within 30 minutes of an alternate airport. The directive (2003-02-51) cites instances of cracked fuel feed lines and damaged transfer couplings due to vibration and fuel-line misalignment in the center tank. The problem could cause the center tank to overfill and leak, the FAA said.
An STC for after-production installation of the auxiliary fuel tanks for the Boeing Business Jet 2 is expected this month, about three months later than originally planned. PATS of Columbia, Md., is doing the aux tank installation in addition to BBJ2 winglet installations at its Georgetown, Del. facility.
Pronal, one of Europe’s major manufacturers of bladder tanks designed to store and transport liquids, has developed new elastomer materials for use in manufacturing its onboard fuel tanks for civil and military aircraft, including helicopters.