Introduced in 1977, Skydrol LD-4 aviation hydraulic fluid became a breakthrough product, solving problems of valve erosion and thermal stability common in earlier fluids. Its excellent thermal stability under real world conditions has given it a reputation as the gold standard among Type IV fluids.
Manufacturer Approvals:
Airbus (excluding A350)
Antonov (An-148 and 158)
ATR
Beriev (Be-200)
Boeing (excluding B787)
Bombardier
British Aerospace
Cessna
COMAC
Embraer
Fokker
Gulfstream
Ilyushin (IL-86 and 96)
Lockheed
Mitsubishi
Sukhoi (Superjet 100)
Tupolev (Tu-204 and Tu-214)
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