Boeing Defense & Space Group Airworthiness Directives

11 ADs indexed for Boeing Defense & Space Group aircraft.

Models

44A 6 ADs 44B 6 ADs 42A 2 ADs 42B 2 ADs 727 Series 1 AD 727-100 Series 1 AD 727-100C Series 1 AD 727-200 Series 1 AD 727C Series 1 AD 737-100 Series 1 AD 737-200 Series 1 AD 737-200C Series 1 AD HS 748 Series 2A 1 AD HS 748 Series 2B 1 AD Various 1 AD 42A 1 AD 42B 1 AD H-21B 1 AD H21A 1 AD 42A 1 AD 42B 1 AD 44A 1 AD 44B 1 AD H-21B 1 AD H21A 1 AD 42A 1 AD 42B 1 AD 44A 1 AD 44B 1 AD H-21B 1 AD

Recent ADs

2014-13-04

final rule

Airworthiness Directives; Columbia Helicopters, Inc. (Type Certificate Previously Held by Boeing Defense & Space Group) Helicopters

Unsafe Condition: Fatigue failure of the structure surrounding the aft pylon following an aft rotor blade failure, leading to blade separation, vibration, and overload of the aft pylon structure, resulting in pylon ...

Effective: Jul 15, 2014 Category: aircraft Compliance: Within 50 hours time-in-service (TIS) for initial inspections, and thereafter at intervals not to...

Why matched: Airworthiness Directives; Columbia Helicopters, Inc. (Type Certificate Previously Held by Boeing Defense & Space Group) Helicopters

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system
View Details View AD (PDF) ↗

75-08-17

final rule

Airworthiness Directives; LOCKHEED AIRCRAFT SERVICE COMPANY: Applies to Lockheed Aircraft Service Company Model 209 Digital Flight Data Recorders

Unsafe Condition: Failure of the vibration isolators under the ARINC 1/2 ATR rack supporting the Model 209 Digital Flight Data Recorder could result in unsatisfactory recording of required flight data parameters.

Effective: Dec 19, 1975 Category: appliance Compliance: on or before January 1, 1976, unless already accomplished, except for Boeing 727 and 737 airplane...

Why matched: Airworthiness Directives; LOCKHEED AIRCRAFT SERVICE COMPANY: Applies to Lockheed Aircraft Service Company Model 209 Digital Flight Data Recorders

View Details Official Source ↗

68-06-01

final rule

Airworthiness Directives; BOEING - VERTOL Type 42A, 42B, 44A, 44B and Military H-21 Series Helicopters

Unsafe Condition: Fatigue failures of the attaching lugs on transmission drive shaft flex coupling adapter P/N 22D3047-1.

Effective: Mar 21, 1968 Category: aircraft Compliance: within 15 hours' time in service after the effective date of this AD

Why matched: Airworthiness Directives; BOEING - VERTOL Type 42A, 42B, 44A, 44B and Military H-21 Series Helicopters

View Details Official Source ↗

64-27-04

final rule

Airworthiness Directives; VERTOL Models H-21 and 42 Series Helicopters

Unsafe Condition: Fatigue failure of wood rotor blade root socket, P/N 22R1364-1, due to cracks in the slot area between the inboard clamp bolt and the relief hole at the inboard end of the slot.

Effective: Dec 10, 1964 Category: aircraft Compliance: Compliance required as indicated. The AD is effective December 10, 1964.

Why matched: Airworthiness Directives; VERTOL Models H-21 and 42 Series Helicopters

Technical illustration of a helicopter rotor hub assembly
Problem area Rotor system
View Details Official Source ↗

64-19-06

final rule

Airworthiness Directives; VERTOL Models 42A, 42B (Military H21B, H21C), 44A and 44B Helicopters

Unsafe Condition: Spiral bevel pinion gear P/N 42D2043-2 failed due to metallurgical processing contributing factor.

Effective: Aug 7, 1964 Category: aircraft Compliance: Within 10 hours' time in service after August 7, 1964 for gears with 500+ hours, or within 50 hou...

Why matched: Airworthiness Directives; VERTOL Models 42A, 42B (Military H21B, H21C), 44A and 44B Helicopters

View Details Official Source ↗

60-23-05

final rule

Airworthiness Directives; VERTOL Models 42 and 44 Series Helicopters

Unsafe Condition: Fatigue failure of the lower directional bellcrank assembly, part number 22C1611-13.

Effective: Nov 8, 1960 Category: aircraft Compliance: Compliance required as indicated.

Why matched: Airworthiness Directives; VERTOL Models 42 and 44 Series Helicopters

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59-20-01

final rule

Airworthiness Directives; VERTOL Model 44 Series Helicopters

Unsafe Condition: Failure of strap P/N 42R1011-1 in the spar weight assembly P/N 42R1009-1 of metal forward rotor blades.

Category: aircraft Compliance: within the next twenty hours of flight

Why matched: Airworthiness Directives; VERTOL Model 44 Series Helicopters

View Details Official Source ↗

60-10-10

final rule

Airworthiness Directives; VERTOL Model 44 Series Helicopters

Unsafe Condition: Forward rotor blades P/N 42R1002-9, -13, -15, -19, -90, -130, -131, -132, -150, -152, and modified blades P/N 42R1002-137 and -139 (forward) and P/N 42R1002-2, -4, -20, -40 (aft) may fail due to fa...

Category: aircraft Compliance: Compliance required as indicated.

Why matched: Airworthiness Directives; VERTOL Model 44 Series Helicopters

View Details Official Source ↗

59-19-02

final rule

Airworthiness Directives; VERTOL Models 44A, B, and C Helicopters

Unsafe Condition: Failures of the engine cooling fan discs, blades, and adapter rings have been experienced, originating as cracks at the fan blade mounting hole on the forward face of the disc rim, root radius on t...

Category: aircraft Compliance: prior to next flight

Why matched: Airworthiness Directives; VERTOL Models 44A, B, and C Helicopters

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details Official Source ↗

59-09-04

final rule

Airworthiness Directives; VERTOL Models 44A, B, and C Helicopters

Unsafe Condition: Failure of the low velocity fan disc assembly, P/N 42P6422, due to cracks originating at the blade retaining bolt hole in the disc flange forward face, progressing radially and circumferentially, l...

Category: aircraft Compliance: no later than May 15, 1959

Why matched: Airworthiness Directives; VERTOL Models 44A, B, and C Helicopters

Technical illustration of an aircraft turbine engine assembly
Problem area Engine
View Details Official Source ↗

58-20-04

final rule

Airworthiness Directives; VERTOL Models 42 Series and 44 Series Helicopters

Unsafe Condition: Fatigue failures of the 22D1073-4 jaw clutch driven and 22D1137-4 jaw clutch driver coupling can preclude successful reengagement of the clutch, thereby disconnecting the rotor drive system from th...

Category: aircraft Compliance: as soon as possible but not later than December 1, 1958

Why matched: Airworthiness Directives; VERTOL Models 42 Series and 44 Series Helicopters

View Details Official Source ↗

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