18 ADs indexed for Hamilton Standard Division aircraft.
Airworthiness Directives; Hamilton Standard Division and Hamilton Sundstrand Corporation Propellers
Unsafe Condition: The amount of corrosion detected during major inspections (MI) could result in propeller failure and loss of airplane control.
Why matched: Airworthiness Directives; Hamilton Standard Division and Hamilton Sundstrand Corporation Propellers
Airworthiness Directives; Hamilton Sundstrand Corporation (Formerly Hamilton Standard Division) Model 568F Propellers
Unsafe Condition: Reports of propeller blades found at inspection with random areas of missing adhesive under the compression wrap, which exposed the steel tulip part of the blade, leading to potential corrosion-ind...
Why matched: Airworthiness Directives; Hamilton Sundstrand Corporation (Formerly Hamilton Standard Division) Model 568F Propellers
Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers
Unsafe Condition: Failure of critical control components, including transfer tube assemblies, actuator assemblies, and propeller control units (PCUs), could result in loss of propeller control and subsequent loss of...
Why matched: Hamilton Standard 14RF and 14SF Series, and Hamilton Standard/British Aerospace Model 6/5500/F Propellers
Hamilton Standard Models 14RF-9, 14RF-19, 14RF-21; and 14SF-5, 14SF-7, 14SF-11, 14SFL11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23; and Hamilton Standard/British Aerospace 6/5500/F Propellers
Unsafe Condition: Separation of a propeller blade due to cracks initiating in the blade taper bore, which can result in aircraft damage and possible loss of aircraft control.
Why matched: Hamilton Standard Models 14RF-9, 14RF-19, 14RF-21; and 14SF-5, 14SF-7, 14SF-11, 14SFL11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23; and Hamilton Standard/British Aerospace 6/5500/F Propellers
Hamilton Standard 14RF, 247F, 14SF, and 6/5500/F Series Propellers
Unsafe Condition: Control Unit Servo Ballscrew Internal Spline Assembly
Why matched: Hamilton Standard 14RF, 247F, 14SF, and 6/5500/F Series Propellers
HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers
Unsafe Condition: Loss of control of the propeller blade pitch due to propeller control unit (PCU) ballscrew quill wear.
Why matched: HAMILTON STANDARD Models 14RF-9, 14RF-19, and 14RF-21, and Models 14SF-5, 14SF-7, 14SF-11, 14SF-15, 14SF-17, 14SF-19, and 14SF-23 Propellers, and Hamilton Standard-British Aerospace Model 6/5500/F-1 propellers
HAMILTON STANDARD: Hydromatic (noncounterweighted) propellers with aluminum blades
Unsafe Condition: Propeller blade failure due to corrosion and fatigue in the blade fillet and shank area, particularly under the teflon friction reduction strip and the resin corrosion barrier.
Why matched: HAMILTON STANDARD: Hydromatic (noncounterweighted) propellers with aluminum blades
HAMILTON STANDARD Model 23LF-335 and -371 Propellers
Unsafe Condition: Cracks in the blades/counterweights could cause possible propeller failure.
Why matched: HAMILTON STANDARD Model 23LF-335 and -371 Propellers
HAMILTON STANDARD Model 24PF Propellers
Unsafe Condition: Spalling in the bearing raceway surfaces of the barrel and blade split races can lead to propeller failure.
Why matched: HAMILTON STANDARD Model 24PF Propellers
HAMILTON STANDARD Model 24PF Propellers
Unsafe Condition: Fracture of P/N 738410-1 bell crank and P/N 738405-1 pivot due to cyclic loading.
Why matched: HAMILTON STANDARD Model 24PF Propellers
HAMILTON STANDARD Models 23260, 24260, 34D50, 34D51, 34E60, 43E60, and 43H60 Propellers
Unsafe Condition: The dome cap of propellers incorporating a pitch lock can become partially disengaged in flight, resulting in complete loss of propeller control.
Why matched: HAMILTON STANDARD Models 23260, 24260, 34D50, 34D51, 34E60, 43E60, and 43H60 Propellers
HAMILTON STANDARD Models 23260, 24260, and 34D Series Propellers
Unsafe Condition: Fatigue in highly stressed areas of the servo piston shaft could cause breakage, leading to reverse system malfunction.
Why matched: HAMILTON STANDARD Models 23260, 24260, and 34D Series Propellers
HAMILTON STANDARD Models 34E60 Propellers
Unsafe Condition: Dome cap fractures resulting in propeller overspeed and inability to feather.
Why matched: HAMILTON STANDARD Models 34E60 Propellers
HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers
Unsafe Condition: The low pitch stop wedge can move forward from its position under the stop levers under vibratory conditions, allowing the propeller to travel into the reverse range upon governor demand for lower ...
Why matched: HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers
HAMILTON STANDARD Model 24260 Propellers
Unsafe Condition: Cracks occurring in several 24260 hubs when installed on Boeing 377 aircraft.
Why matched: HAMILTON STANDARD Model 24260 Propellers
HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers
Unsafe Condition: Unwanted reversal of Hamilton Standard propellers could occur due to broken plunger spring, oil film between armature and valve body, or foreign particle lodged between valve and seat in Model 6700...
Why matched: HAMILTON STANDARD Models 43D, 43E, 34D, 34E, 232 and 242 Propellers
HAMILTON STANDARD Models 34E, 43E, and 43H Propellers
Unsafe Condition: Cases of propeller-engine overspeeds have resulted in instances of failure to feather, reversing when feathering was initiated, and in aircraft fires.
Why matched: HAMILTON STANDARD Models 34E, 43E, and 43H Propellers
HAMILTON STANDARD Models 43E60 Propellers
Unsafe Condition: The analysis of loadings and stresses in the Hamilton Standard 43E60/6903 propeller revealed a need to improve the strength characteristics of the propeller barrel assembly to preclude failures.
Why matched: HAMILTON STANDARD Models 43E60 Propellers