Orlando Helicopter Airways, Inc. | Sikorsky Aircraft Corporation Airworthiness Directives

Airworthiness Directives; FEDERICO HELICOPTERS, INVEST IN OPPORTUNITIES, INC., ORLANDO HELICOPTER AIRWAYS, CONSOLIDATED AIR CRANE, INC., and PACIFIC AVIATION, INC., Sikorsky Aircraft-manufactured Model CH-34A, CH-34C, H-34A, HH-34J, HSS-1, HSS-1N, HUS-1, SH-34J, UH-34D, UH-34E, and UH-34J Helicopters

Unsafe Condition: Failure of the main rotor shaft due to cracks in the shaft assembly, part number S1635-20059-2, leading to loss of power to the rotor system and subsequent loss of control of the helicopter.

Why matched: Airworthiness Directives; FEDERICO HELICOPTERS, INVEST IN OPPORTUNITIES, INC., ORLANDO HELICOPTER AIRWAYS, CONSOLIDATED AIR CRANE, INC., and PACIFIC AVIATION, INC., Sikorsky Aircraft-manufactured Model CH-34A, CH-34C, H-34A, HH-34J, HSS-1, HSS-1N, HUS-1, SH-34J, UH-34D, UH-34E, and UH-34J Helicopters

Airworthiness Directives; Sikorsky Models S-55 Series and S-62A Helicopters

Unsafe Condition: Fatigue cracks in the spar of a main rotor blade

Why matched: Airworthiness Directives; Sikorsky Models S-55 Series and S-62A Helicopters

Airworthiness Directives; Sikorsky Models S-55, S-55B, S-55C, and S-62A Helicopters Including Military Types HRS-1, HRS-3, CH-19, H-19B, H-19G, H-19A, H-19D, HO4S-3G, UH-19D, H19D5, UH-19B, and UH-19D Helicopters

Unsafe Condition: Cracks in the exposed areas of the lugs of main rotor spindles P/N S10-10-3325-1 and S10-10-3325-2.

Why matched: Airworthiness Directives; Sikorsky Models S-55, S-55B, S-55C, and S-62A Helicopters Including Military Types HRS-1, HRS-3, CH-19, H-19B, H-19G, H-19A, H-19D, HO4S-3G, UH-19D, H19D5, UH-19B, and UH-19D Helicopters

Airworthiness Directives; Sikorsky Models HRS-1/CH-19, HRS-3/H-19B, H-19D, and H-19G Helicopters

Unsafe Condition: Failure of the main rotor shaft due to fatigue cracks originating from surface defects.

Why matched: Airworthiness Directives; Sikorsky Models HRS-1/CH-19, HRS-3/H-19B, H-19D, and H-19G Helicopters

Airworthiness Directives; Sikorsky Models S-55, S-62, and S-61 Series Helicopters

Unsafe Condition: Pitting in main rotor blade spars has resulted in fatigue cracks.

Why matched: Airworthiness Directives; Sikorsky Models S-55, S-62, and S-61 Series Helicopters

Airworthiness Directives; Sikorsky Model S-55 Series Helicopters

Unsafe Condition: Fatigue fracture of the main rotor blade spar.

Why matched: Airworthiness Directives; Sikorsky Model S-55 Series Helicopters

Airworthiness Directives; Sikorsky Models S-51 and S-55 Helicopters

Unsafe Condition: Fatigue failure of the RE5M7 shank rod end bearing with a hollow shank, which is not an approved part, occurred in the S-55 main rotor upper controls due to improper identification and installation.

Why matched: Airworthiness Directives; Sikorsky Models S-51 and S-55 Helicopters

Airworthiness Directives; Sikorsky Model S-55 Helicopters

Unsafe Condition: Cracks in main transmission rear accessory covers (S14-35-4000, S14-35-4300), main transmission support assembly (S14-20-2503), servo brackets (S14-40-2113, S14-40-2143, S14-40-2411), and insuffici...

Why matched: Airworthiness Directives; Sikorsky Model S-55 Helicopters

Airworthiness Directives; Sikorsky Models S-55 and S-51 Helicopters

Unsafe Condition: Fine cuts on the spar beneath the edges of the pockets of main rotor blades, resulting from repairs to blade pockets, which act as serious stress raisers and may reduce blade service life.

Why matched: Airworthiness Directives; Sikorsky Models S-55 and S-51 Helicopters