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2005-12-51

final rule

Airworthiness Directives; Rockwell International (Aircraft Specification No. A-2-575 Previously Held by North American and Recently Purchased by Boeing) Models AT-6 (SNJ-2), AT-6A (SNJ-3), AT-6B, AT-6C (SNJ-4), AT-6D (SNJ-5), AT-6F (SNJ-6), BC-1A, SNJ-7, and T-6G Airplanes; and Autair Ltd. (Aircraft Specification No. AR-11 Previously Held by Noorduyn Aviation Ltd.) Model Harvard (Army AT-16) Airplanes

Unsafe Condition: Fatigue cracks in the inboard and outboard, upper and lower wing attach angles (except for the nose angles) of both wings.

Effective: Jun 23, 2005 Category: aircraft Compliance: Before further flight

Why matched: Airworthiness Directives; Rockwell International (Aircraft Specification No. A-2-575 previously held by North American and recently purchased by Boeing) Models AT-6 (SNJ-2), AT-6A (SNJ-3), AT- 6B, AT-6C (SNJ-4), AT-6D (SNJ-5), AT-6F (SNJ-6), BC-1A, SNJ-7, and T-6G Airplanes; and Autair Ltd. (Aircraft Specification No. AR-11 previously held by Noorduyn Aviation Ltd.) Model Harvard (Army AT-16) Airplanes

View Details View AD (PDF) ↗

81-14-10

final rule

Airworthiness Directives; North American Model AT-6D, AT-6F and T-6G Series Airplanes

Unsafe Condition: Cracks in the single piece design horizontal stabilizer rear spar connector fittings (P/N 77-21021) could result in structural failure of the horizontal stabilizer.

Effective: Jul 13, 1981 Category: aircraft Compliance: within 20 flight hours after the effective date of this AD and every 20 flight hours thereafter u...

Why matched: Airworthiness Directives; North American Model AT-6D, AT-6F and T-6G Series Airplanes

Technical illustration of a riveted aircraft structural panel and frame
Problem area Airframe structure
View Details Official Source ↗

73-01-01

final rule

Airworthiness Directives; North American Rockwell - Aero Commander Model 100-180 and Model 100 Airplanes

Unsafe Condition: Loss or reduction of engine power due to exhaust outlet blockage.

Effective: Dec 29, 1972 Category: aircraft Compliance: Prior to the next 25 hours time in service if the exhaust system has accumulated 500 or more hour...

Why matched: Airworthiness Directives; North American Rockwell - Aero Commander Model 100-180 and Model 100 Airplanes

View Details Official Source ↗

72-23-04

final rule

Airworthiness Directives; NORTH AMERICAN ROCKWELL Model NA-265-40, NA-265-50, and NA-265-60

Unsafe Condition: Cracks, tool marks, nicks, scratches, rust, or other minor surface blemishes on the main landing gear outer strut cylinder and inner trunnion (cone shaped) surface could result in structural failure.

Effective: Nov 11, 1972 Category: aircraft Compliance: Within the next 100 hours' time in service, but not later than 90 days after the effective date o...

Why matched: Airworthiness Directives; NORTH AMERICAN ROCKWELL Model NA-265-40, NA-265-50, and NA-265-60

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear
View Details Official Source ↗

72-19-03

final rule

Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, and NA-265-30, NA-265-40, NA-265-50, and NA-265-60 Airplanes

Unsafe Condition: Failure of the landing gear side brace could result in collapse of the landing gear during landing.

Effective: Sep 15, 1972 Category: aircraft Compliance: Within the next 25 hours' time in service after receipt of this telegram, but not later than 1 Oc...

Why matched: Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, and NA-265-30, NA-265-40, NA-265-50, and NA-265-60 Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear
View Details Official Source ↗

72-14-04

final rule

Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, NA-265-30, NA-265-40, and NA-265-60

Unsafe Condition: Failure of the main landing gear wheel door torque tube assembly due to cracking in the area 3 inches adjacent to the fore and aft weldments.

Effective: Jul 7, 1972 Category: aircraft Compliance: Within 50 hours' time in service after the effective date of this AD, unless already accomplished...

Why matched: Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, NA-265-30, NA-265-40, and NA-265-60

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear
View Details Official Source ↗

71-25-04

final rule

Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, NA-265-30, NA-265-40, NA-265-60, NA-265-70

Unsafe Condition: Failure of the aileron control cables due to broken wires or wear reducing cable cross section area.

Effective: Dec 4, 1971 Category: aircraft Compliance: Within the next 100 hours time in service after the effective date of this AD, unless already acc...

Why matched: Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, NA-265-30, NA-265-40, NA-265-60, NA-265-70

Technical illustration of an aircraft flight control surface and actuator
Problem area Flight controls
View Details Official Source ↗

71-03-03

final rule

Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, NA-265-30, NA-265-40, and NA- 265-60

Unsafe Condition: Failure of the outboard flap track attachment lug due to cracking in the wing rear spar.

Effective: Feb 6, 1971 Category: aircraft Compliance: within the next 30 days after the effective date of this AD unless already accomplished

Why matched: Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, NA-265-30, NA-265-40, and NA- 265-60

Technical illustration of a riveted aircraft structural panel and frame
Problem area Airframe structure
View Details Official Source ↗

70-24-03

final rule

Airworthiness Directives; NORTH AMERICAN ROCKWELL NA-265 Series Airplanes

Unsafe Condition: Unwanted actuation of the Engine Emergency Fire Control 'T' handle to the emergency position due to insufficient interlock actuator pin design.

Effective: Nov 28, 1970 Category: aircraft Compliance: within the next 100 hours' time in service, or 120 days, whichever occurs earlier, after the effe...

Why matched: Airworthiness Directives; NORTH AMERICAN ROCKWELL NA-265 Series Airplanes

View Details Official Source ↗

70-12-06

final rule

Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, NA-265-30, NA-265-40, and NA-265- 60 Airplanes

Unsafe Condition: Severe nose gear shimmy and subsequent failure of the nose gear strut.

Effective: Jun 16, 1970 Category: aircraft Compliance: within the next 100 hours time in service after the effective date of this AD unless already acco...

Why matched: Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, NA-265-30, NA-265-40, and NA-265- 60 Airplanes

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear
View Details Official Source ↗

70-02-09

final rule

Airworthiness Directives; NORTH AMERICAN Models NA-265-40 and -60

Unsafe Condition: Failure of the engine thrust reverser mechanism could result in uncommanded thrust reversal during flight, leading to loss of control.

Effective: Dec 19, 1969 Category: aircraft Compliance: Within ten (10) hours time in service or not later than December 29, 1969, whichever occurs first...

Why matched: Airworthiness Directives; NORTH AMERICAN Models NA-265-40 and -60

View Details Official Source ↗

69-12-08

final rule

AERO COMMANDER DIVISION, NORTH AMERICAN ROCKWELL CORPORATION Model 1121 Series Airplanes

Unsafe Condition: Failures of fuel supply system hose assemblies, part numbers AE700024-1, 6723008-65, 6723008-67, 6723008-149, and 6723008-179, due to separation of the hose liner material from the wire braid reinf...

Effective: Jun 21, 1969 Category: aircraft Compliance: Within the next 15 hours' time in service after the effective date of this AD (for initial inspec...

Why matched: AERO COMMANDER DIVISION, NORTH AMERICAN ROCKWELL CORPORATION Model 1121 Series Airplanes

Technical illustration of an aircraft electrical generator and wiring assembly
Problem area Electrical system
View Details Official Source ↗

69-08-10

final rule

Airworthiness Directives; AERO COMMANDER DIVISION, NORTH AMERICAN ROCKWELL CORPORATION Model 1121 Series Airplanes

Unsafe Condition: Failure of the horizontal stabilizer trim system to provide required trim capability at the approved aft center of gravity limit.

Effective: May 24, 1969 Category: aircraft Compliance: within the next 100 hours' time in service after the effective date of this A.D.

Why matched: Airworthiness Directives; AERO COMMANDER DIVISION, NORTH AMERICAN ROCKWELL CORPORATION Model 1121 Series Airplanes

Technical illustration of an aircraft flight control surface and actuator
Problem area Flight controls
View Details Official Source ↗

69-10-01

final rule

Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265 Series Aircraft

Unsafe Condition: Failure of the main landing gear pistons due to insufficient rework or inspection of the lower inside diameter.

Effective: May 9, 1969 Category: aircraft Compliance: Within 15 hours time in service after the effective date for Part I pistons, and within 300 hours...

Why matched: Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265 Series Aircraft

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear
View Details Official Source ↗

68-20-01

final rule

Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, NA-265-30, NA-265-40 and NA-265-60

Unsafe Condition: Small cracks have been discovered in the area near the attachment bolt holes of the horizontal stabilizer support fitting.

Effective: Oct 28, 1968 Category: aircraft Compliance: within the next 100 hours time in service after the effective date of this AD

Why matched: Airworthiness Directives; NORTH AMERICAN ROCKWELL Models NA-265, NA-265-20, NA-265-30, NA-265-40 and NA-265-60

View Details Official Source ↗

61-05-05

final rule

Airworthiness Directives; North American Model T-28A Aircraft

Unsafe Condition: The R-1300-1A engines may experience failure modes requiring incorporation of Change 53 of T.O. 2R-R1300-5, fuel pump overhauls, hydraulic pump overhauls, propeller inspections and removal, and cyl...

Effective: Mar 4, 1961 Category: engine Compliance: Compliance required as indicated.

Why matched: Airworthiness Directives; North American Model T-28A Aircraft

View Details Official Source ↗

50-09-01

final rule

Airworthiness Directives; North American Models Model BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft

Unsafe Condition: Cracked stabilizer spar fittings and improper installation of shims may result in structural failure of the horizontal stabilizer connection.

Category: aircraft Compliance: prior to original certification

Why matched: Airworthiness Directives; North American Models Model BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft

Technical illustration of a riveted aircraft structural panel and frame
Problem area Airframe structure
View Details Official Source ↗

58-22-02

final rule

Airworthiness Directives; North American Model T-28A Aircraft

Unsafe Condition: Fatigue cracks emanating from the bolt holes in the main landing gear trunnion shaft.

Category: aircraft Compliance: every 200 hours

Why matched: Airworthiness Directives; North American Model T-28A Aircraft

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear
View Details Official Source ↗

50-38-01

final rule

Airworthiness Directives; North American Model AT-6 Series Aircraft

Unsafe Condition: Intergranular corrosion in structural aluminum alloy components of the fuselage and wings may lead to structural failure.

Category: aircraft Compliance: at the next annual inspection and at each succeeding annual inspection thereafter

Why matched: Airworthiness Directives; North American Model AT-6 Series Aircraft

View Details Official Source ↗

46-46-02

final rule

Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft

Unsafe Condition: Failure of the elevator rear stop on the horizontal stabilizer rear spar could result in improper elevator travel limits and loss of control.

Category: aircraft Compliance: prior to January 1, 1947

Why matched: Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft

View Details Official Source ↗

46-11-01

final rule

Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C

Unsafe Condition: Cracks in the inboard end of the landing gear retracting strut attachment support channel (P/N 55-14102 or 66-14102-1) at the wing outer panel joint.

Category: aircraft Compliance: at each periodic inspection

Why matched: Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C

Technical illustration of an aircraft landing gear and wheel assembly
Problem area Landing gear
View Details Official Source ↗

49-07-02

final rule

Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft

Unsafe Condition: Engine stoppage on takeoffs and landings when operating on the left tank standpipe outlet with fuel levels down to the standpipe level due to pilot misinterpretation of the left tank fuel gauge and...

Category: aircraft Compliance: not later than April 1, 1949

Why matched: Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft

View Details Official Source ↗

46-17-01

final rule

Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft

Unsafe Condition: Broken universal joint pins in the flap control push-pull tubes, part number 19-152642, connecting the outer and inner flap.

Category: aircraft Compliance: prior to original certification or at first periodic inspection thereafter

Why matched: Airworthiness Directives; North American Models BC-1A, AT-6, AT-6A, AT-6B, and AT-6C Aircraft

View Details Official Source ↗