71 results found (2740ms)
Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters (Type Certificate Previously Held by Schweizer Aircraft Corporation)
Unsafe Condition: Reports of accidents due to driveshaft failures indicate an unsafe condition involving corrosion, pits, nicks, scratches, dents, and cracks in the driveshaft.
Why matched: Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters (Type Certificate Previously Held by Schweizer Aircraft Corporation)
Airworthiness Directives; Sikorsky Aircraft Corporation (Type Certificate Previously Held by Schweizer Aircraft Corporation)
Unsafe Condition: Insufficient lubrication of a tail rotor (T/R) driveshaft splined fitting could result in excessive wear of the T/R driveshaft splines, leading to failure of the T/R driveshaft and subsequent loss ...
Why matched: Airworthiness Directives; Sikorsky Aircraft Corporation (Type Certificate Previously Held by Schweizer Aircraft Corporation)
Airworthiness Directives; Sikorsky Aircraft Corporation (Type Certificate Previously Held by Schweizer Aircraft Corporation) Helicopters
Unsafe Condition: Fatigue crack in the ring gear carrier assembly, which could result in failure of the main rotor transmission, loss of engine power to the main rotor, and subsequent loss of control of the helicopter.
Why matched: Airworthiness Directives; Sikorsky Aircraft Corporation (Type Certificate Previously Held by Schweizer Aircraft Corporation) Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation
Unsafe Condition: Cracks in the aft fuselage assembly around the horizontal stabilizer attachment point and in the tailboom interior support structure, which could lead to horizontal stabilizer separation and loss o...
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation
Airworthiness Directives; Schweizer Aircraft Corporation
Unsafe Condition: Loose horizontal stabilizers and cracks in the stabilizer support structure for the extruded tailboom, which could result in separation of the horizontal stabilizer from the helicopter and subseque...
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation
Airworthiness Directives; Schweizer Aircraft Corporation (Schweizer) Model 269A, A-1, B, C, C-1, and TH-55 Series Helicopters
Unsafe Condition: A locknut working loose from a bolt attaching the tailboom support strut at the aft cluster fitting, due to improper threads on the locknut, could cause the strut and driveshaft to separate from th...
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation (Schweizer) Model 269A, A-1, B, C, C-1, and TH-55 Series Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation (Schweizer) Model 269D Helicopters
Unsafe Condition: Separation of the blades of the oil cooler impeller due to fatigue cracks at the root of the blade, which can damage the oil cooler and lead to loss of engine and transmission oil pressure.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation (Schweizer) Model 269D Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269C, C-1, and D Helicopters
Unsafe Condition: Separation of the inner spring tube from the lateral trim control housing, resulting in loss of trim control, increased local resistance to right cyclic stick movement, and potential emergency land...
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269C, C-1, and D Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Unsafe Condition: Failure of a tailboom support strut or a cluster fitting could cause rotation of a tailboom into the main rotor blades, and subsequent loss of control of the helicopter.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Unsafe Condition: which could cause rotation of a tailboom into the main rotor blades, and subsequent loss of control of the helicopter.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Unsafe Condition: which could cause rotation of a tailboom into the main rotor blades, and subsequent loss of control of the helicopter.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269D Helicopters
Unsafe Condition: Loose or separated aluminum horizontal stabilizer endplates and attach angles, which could strike the tail rotor and lead to loss of control.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269D Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Unsafe Condition: Failure of a strut clevis lug on a tailboom center frame aft cluster fitting, leading to rotation of the tailboom into the main rotor blades and subsequent loss of control.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, 269C-1, 269D, and TH-55A Helicopters
Unsafe Condition: Failure of the tail rotor swashplate shaft (shaft) due to an undersized replacement shaft, which could lead to loss of the tail rotor and subsequent loss of control of the helicopter.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, 269C-1, 269D, and TH-55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, 269C-1, and 269D Helicopters
Unsafe Condition: Undersized tail rotor swashplate shaft nut looseness and potential undersized shafts could lead to shaft failure and subsequent loss of control of the helicopter.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, 269A-1, 269B, 269C, 269C-1, and 269D Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269C-1 Helicopters
Unsafe Condition: Debonding and corrosion have occurred on certain main rotor blade abrasion strips where they attach to the blade skin, leading to potential loss of the abrasion strip and subsequent loss of control...
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269C-1 Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269D Helicopters
Unsafe Condition: Cracking in the main rotor drive shaft due to loss of clamping torque on the hub and shaft assembly, caused by the use of grease between the hub and shaft.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269D Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269D Helicopters
Unsafe Condition: Cracking in the main rotor drive shaft caused by loss of clamping torque on the hub and shaft assembly due to grease between the hub and shaft, leading to potential shaft failure and loss of control.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269D Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, 269D, and TH-55A Helicopters
Unsafe Condition: Debonding and corrosion have occurred on certain main rotor blade abrasion strips where they attach to the blade skin, leading to potential loss of the abrasion strip and subsequent loss of control...
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, 269D, and TH-55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, 269D, and TH- 55A Helicopters
Unsafe Condition: Debonding and corrosion have occurred on certain blades where the abrasion strip attaches to the blade skin.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, 269D, and TH- 55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, A-1, B, and C, and TH-55A Helicopters
Unsafe Condition: Failure of the main rotor transmission ring gear due to single tooth distress caused by improper gear tooth spacing during manufacturing.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, A-1, B, and C, and TH-55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, A-1, B, and C, and TH-55A Helicopters
Unsafe Condition: Failure of the ring gear, loss of drive to the main rotor gearbox, and a subsequent forced landing.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation Model 269A, A-1, B, and C, and TH-55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, and TH-55A Helicopters
Unsafe Condition: Failure of the main rotor thrust bearing (bearing), loss of the main rotor, and subsequent loss of control of the helicopter.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, and TH-55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Unsafe Condition: Structural failure of the main rotor (M/R) drive shaft, separation of the M/R from the helicopter, and subsequent loss of control of the helicopter.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters
Unsafe Condition: Structural failure of the main rotor (M/R) drive shaft, separation of the M/R from the helicopter, and subsequent loss of control of the helicopter.
Why matched: Airworthiness Directives; Schweizer Aircraft Corporation and Hughes Helicopters, Inc. Model 269A, 269A-1, 269B, 269C, and TH-55A Helicopters