AD 98-07-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Twin Commander Aircraft LLC | 500 | Airworthiness Directives; Twin Commander Aircraft Corporation 500, 520, 560, 680, 681, 685, 690, 695, and 720 Series Airplanes |
| aircraft | Twin Commander Aircraft LLC | 500-A | Airworthiness Directives; Twin Commander Aircraft Corporation 500, 520, 560, 680, 681, 685, 690, 695, and 720 Series Airplanes |
| aircraft | Twin Commander Aircraft LLC | 500-B | Airworthiness Directives; Twin Commander Aircraft Corporation 500, 520, 560, 680, 681, 685, 690, 695, and 720 Series Airplanes |
| aircraft | Twin Commander Aircraft LLC | 500-S | Airworthiness Directives; Twin Commander Aircraft Corporation 500, 520, 560, 680, 681, 685, 690, 695, and 720 Series Airplanes |
| aircraft | Twin Commander Aircraft LLC | 500-U | Airworthiness Directives; Twin Commander Aircraft Corporation 500, 520, 560, 680, 681, 685, 690, 695, and 720 Series Airplanes |
| aircraft | Twin Commander Aircraft LLC | 520 | Airworthiness Directives; Twin Commander Aircraft Corporation 500, 520, 560, 680, 681, 685, 690, 695, and 720 Series Airplanes |
| aircraft | Twin Commander Aircraft LLC | 560 | Airworthiness Directives; Twin Commander Aircraft Corporation 500, 520, 560, 680, 681, 685, 690, 695, and 720 Series Airplanes |
| aircraft | Twin Commander Aircraft LLC | 560-A | Airworthiness Directives; Twin Commander Aircraft Corporation 500, 520, 560, 680, 681, 685, 690, 695, and 720 Series Airplanes |
| aircraft | Twin Commander Aircraft LLC | 560-E | Airworthiness Directives; Twin Commander Aircraft Corporation 500, 520, 560, 680, 681, 685, 690, 695, and 720 Series Airplanes |
| aircraft | Twin Commander Aircraft LLC | 560-F | Airworthiness Directives; Twin Commander Aircraft Corporation 500, 520, 560, 680, 681, 685, 690, 695, and 720 Series Airplanes |
Unsafe Condition
Failure of a flap system cable caused by fatigue, which could result in loss of control of the airplane.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect all flap system cable grooves for correct width, inspect all flap system pulleys for rubbing on support brackets, inspect all flap pulley cable assemblies for frayed wires, mark inspected pulleys with two parallel lines, and rework or replace parts with discrepancies before further flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 300 hours time-in-service (TIS) after the effective date of this AD
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Affected Aircraft
Twin Commander Aircraft Corporation models 500, 520, 560, 680, 681, 685, 690, 695, and 720 series (all serial numbers)
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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