49-06-04
final ruleBOEING Model 377 Aircraft
Unsafe Condition: The 11 convolution type altitude compensating bellows (Bendix P/N 390935) may fail due to fatigue after 100 hours of operation.
Why matched: BOEING Model 377 Aircraft
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56-01-02
final ruleBOEING Model 377 Aircraft
Unsafe Condition: Cracks discovered at wing spar splice bolt holes, specifically at No. 1 bolt hole in each rear spar Station 246 joint and Nos. 1 and 6 bolt holes in each front and rear spar Station 510 joints, as ...
Why matched: BOEING Model 377 Aircraft
53-05-01
final ruleAirworthiness Directives; All BOEING 377, CONVAIR 240 Series, DOUGLAS DC-6 Series, and LOCKHEED 749 Series
Unsafe Condition: The unsafe condition involves inadequate isolation of the reverse slip ring and brushes from other circuits, increasing the risk of unintended electrical contact and potential failure of the revers...
Why matched: Airworthiness Directives; All BOEING 377, CONVAIR 240 Series, DOUGLAS DC-6 Series, and LOCKHEED 749 Series
55-15-01
final ruleBOEING 377 Series Aircraft
Unsafe Condition: Flexible hose components of propeller feathering lines forward of the firewall in zone 2 may fail due to insufficient fire resistance, increasing the risk of system damage from a powerplant fire.
Why matched: BOEING 377 Series Aircraft
50-40-01
final ruleBOEING Model 377 Aircraft
Unsafe Condition: Circumferential cracks in the nose gear spindle adjacent to the weld between the spindle shaft (P/N 9-13735) and spindle bearing (P/N 6-25978), and cracks in the trapezoidal cutout of the nose land...
Why matched: BOEING Model 377 Aircraft
51-27-02
final ruleBOEING Model B-377 Aircraft
Unsafe Condition: Fatigue cracks in Goodrich H-3-626 and H-3-650 wheel assemblies may result in serious hazards.
Why matched: BOEING Model B-377 Aircraft
52-15-01
final ruleBOEING Model 377 Airplanes
Unsafe Condition: Inadvertent actuation of the propeller reversing solenoid valves due to lack of isolation from other electrical circuits and each other.
Why matched: BOEING Model 377 Airplanes