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81-10-02

final rule

Airworthiness Directive; HILLER AVIATION Models FH 1100 Series Helicopter

Unsafe Condition: The upper controls support column may contact and damage the main rotor mast due to an undersized base flange (P/N 24-30210) with thickness less than 0.080 inches (0.090 ± 0.010 inches specification).

Effective: May 11, 1981 Category: aircraft Compliance: Within the next ten (10) calendar days from the effective date of this AD and prior to further fl...

Why matched: Airworthiness Directive; HILLER AVIATION Models FH 1100 Series Helicopter

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

79-11-04

final rule

Airworthiness Directives; Fairchild (Hiller) Model 1100 and FH-1100 Helicopters

Unsafe Condition: Cracking of the transmission lower housing gimbal ring support.

Effective: Jun 4, 1979 Category: aircraft Compliance: within 50 hours after the effective date of this AD, unless already accomplished within the last ...

Why matched: Airworthiness Directives; Fairchild (Hiller) Model 1100 and FH-1100 Helicopters

77-07-08

final rule

Airworthiness Directives; Fairchild (Hiller) Models 1100 and FH 1100 Helicopters

Unsafe Condition: Improper surface finish in the bolt holes at each end of the tail rotor tension torsion bars, P/N's 24-55106 with serial numbers prior to 1922 or illegible serial numbers, could lead to cracking of...

Effective: Aug 5, 1977 Category: aircraft Compliance: within the next 25 hours in service after the effective date of this AD unless already accomplished

Why matched: Airworthiness Directives; Fairchild (Hiller) Models 1100 and FH 1100 Helicopters

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

75-03-04

final rule

Airworthiness Directives; Fairchild (Hiller) Model 1100 and FG-1100 Helicopters

Unsafe Condition: Cracks in the tail fin spar channel, P/N 24-62030-7 or P/N 24-62030-43, in the area of the tail rotor gear box mount, P/N 24-62006-3.

Effective: Jul 8, 1975 Category: aircraft Compliance: within the next five hours in service after the effective date of this AD unless already accompli...

Why matched: Airworthiness Directives; Fairchild (Hiller) Model 1100 and FG-1100 Helicopters

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

71-22-03

final rule

Airworthiness Directives; Fairchild Hiller Model FH-1100 Helicopters

Unsafe Condition: Failure of the FH1100 tail rotor bearing block, P/N 24-24010-3, due to cracks in the fuselage frame Station 163.5.

Effective: May 20, 1975 Category: aircraft Compliance: Within the next 100 hours' time in service, unless already accomplished, and every 100 hours afte...

Why matched: Airworthiness Directives; Fairchild Hiller Model FH-1100 Helicopters

72-13-07

final rule

Airworthiness Directives; Fairchild Hiller Models 1100 and FH 1100 Helicopters

Unsafe Condition: The engine-to-transmission drive shaft assemblies (P/N 19E49-3A, -3B, -3C) may have diaphragm end packs exceeding service limits, leading to potential failure of the drive shaft assembly.

Effective: Jun 27, 1972 Category: aircraft Compliance: within 15 hours in service

Why matched: Airworthiness Directives; Fairchild Hiller Models 1100 and FH 1100 Helicopters

71-24-08

final rule

Airworthiness Directives; Fairchild Hiller Model FH-1100 Helicopters

Unsafe Condition: Failure of the landing gear torque tube P/N 24-43041 at the skid support attachments.

Effective: Nov 30, 1971 Category: aircraft Compliance: Within the next 50 hours in service after the effective date, unless already accomplished within ...

Why matched: Airworthiness Directives; Fairchild Hiller Model FH-1100 Helicopters

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear

71-24-06

final rule

Airworthiness Directives; Fairchild Hiller Model FH-1100 Helicopters

Unsafe Condition: Fatigue failure of the rear attachment lug on engine mount strut P/N 24-63110-1

Effective: Nov 26, 1971 Category: aircraft Compliance: Within the next 25 hours' time in service after the effective date of this AD unless already acco...

Why matched: Airworthiness Directives; Fairchild Hiller Model FH-1100 Helicopters

Technical illustration of an aircraft turbine engine assembly
Problem area Engine

71-24-02

final rule

Airworthiness Directives; Fairchild Hiller Models 1100 and FH-1100 Helicopters

Unsafe Condition: Fatigue failure of the transmission mount strut, P/N 24-28031, due to internal corrosion.

Effective: Nov 24, 1971 Category: aircraft Compliance: within the next 30 days after the effective date of this AD

Why matched: Airworthiness Directives; Fairchild Hiller Models 1100 and FH-1100 Helicopters

71-11-03

final rule

Airworthiness Directives; Fairchild Hiller Models FH-1100 and 1100 Helicopters

Unsafe Condition: The VNE placard may not properly indicate the maximum never-exceed airspeed of 80 MPH IAS, and stabilizers with part numbers 24 62001 or 24 62001 31 may not be modified to prevent flutter or struct...

Effective: May 19, 1971 Category: aircraft Compliance: Before next flight and within 100 hours' time in service after receipt of this message.

Why matched: Airworthiness Directives; Fairchild Hiller Models FH-1100 and 1100 Helicopters

70-18-04

final rule

Airworthiness Directives; Fairchild Hiller Model 1100 Series Helicopters

Unsafe Condition: Failure of transmission vertical struts and mounts (P/N 24-28030-1 and -2) due to cracks in weld areas.

Effective: Sep 15, 1970 Category: aircraft Compliance: within the next 25 flight hours of the effective date of this A/D unless already accomplished

Why matched: Airworthiness Directives; Fairchild Hiller Model 1100 Series Helicopters

68-08-09

final rule

Airworthiness Directives; Fairchild Hiller Model FH-1100 Helicopters

Unsafe Condition: Coupling shafts with specified serial numbers (20, 21, 22, 23, 24, 25, 75, 77, 87, 90, 93, 98, 104, 106) may fail due to material defects or manufacturing anomalies.

Effective: Apr 23, 1968 Category: aircraft Compliance: prior to further flight

Why matched: Airworthiness Directives; Fairchild Hiller Model FH-1100 Helicopters

68-06-05

final rule

Airworthiness Directives; Fairchild-Hiller Model FH-1100 Helicopters

Unsafe Condition: Failure of the engine-to-transmission coupling shaft due to corrosion resulting from water contamination.

Effective: Mar 23, 1968 Category: aircraft Compliance: Within the next 100 helicopter hours' time in service following the effective date of this AD

Why matched: Airworthiness Directives; Fairchild-Hiller Model FH-1100 Helicopters

68-02-04

final rule

Airworthiness Directives, Fairchild-Hiller Model FH-1100 Helicopters

Unsafe Condition: Fatigue failures of the Cyclic Input Swashplate Ring, P/N 24-34205-3.

Effective: Jan 27, 1968 Category: aircraft Compliance: Within the next 10 hours' time in service after the effective date of this AD, and thereafter at ...

Why matched: Airworthiness Directives, Fairchild-Hiller Model FH-1100 Helicopters

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system

66-30-05

final rule

Airworthiness Directives; Fairchild Hiller Model FH-1100 Helicopters

Unsafe Condition: Failure of the Bendix main engine drive shaft, which occurred with less than 15 hours total time on the shaft.

Effective: Dec 20, 1966 Category: aircraft Compliance: before further flight

Why matched: Airworthiness Directives; Fairchild Hiller Model FH-1100 Helicopters