AD 85-22-06 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | M7 Aerospace LLC | SA226-AT | Airworthiness Directives; FAIRCHILD AIRCRAFT CORPORATION (formerly Swearingen Aviation Corporation) Models SA226-T, SA226-AT, SA226-TC, SA226- T(B), SA227-AC, SA227-TT, SA227-AT, Airplanes |
| aircraft | M7 Aerospace LLC | SA226-T | Airworthiness Directives; FAIRCHILD AIRCRAFT CORPORATION (formerly Swearingen Aviation Corporation) Models SA226-T, SA226-AT, SA226-TC, SA226- T(B), SA227-AC, SA227-TT, SA227-AT, Airplanes |
| aircraft | M7 Aerospace LLC | SA226-TC | Airworthiness Directives; FAIRCHILD AIRCRAFT CORPORATION (formerly Swearingen Aviation Corporation) Models SA226-T, SA226-AT, SA226-TC, SA226- T(B), SA227-AC, SA227-TT, SA227-AT, Airplanes |
| aircraft | M7 Aerospace LLC | SA226-T(B) | Airworthiness Directives; FAIRCHILD AIRCRAFT CORPORATION (formerly Swearingen Aviation Corporation) Models SA226-T, SA226-AT, SA226-TC, SA226- T(B), SA227-AC, SA227-TT, SA227-AT, Airplanes |
| aircraft | M7 Aerospace LLC | SA227-AC (C-26A) | Airworthiness Directives; FAIRCHILD AIRCRAFT CORPORATION (formerly Swearingen Aviation Corporation) Models SA226-T, SA226-AT, SA226-TC, SA226- T(B), SA227-AC, SA227-TT, SA227-AT, Airplanes |
| aircraft | M7 Aerospace LLC | SA227-AT | Airworthiness Directives; FAIRCHILD AIRCRAFT CORPORATION (formerly Swearingen Aviation Corporation) Models SA226-T, SA226-AT, SA226-TC, SA226- T(B), SA227-AC, SA227-TT, SA227-AT, Airplanes |
| aircraft | M7 Aerospace LLC | SA227-TT | Airworthiness Directives; FAIRCHILD AIRCRAFT CORPORATION (formerly Swearingen Aviation Corporation) Models SA226-T, SA226-AT, SA226-TC, SA226- T(B), SA227-AC, SA227-TT, SA227-AT, Airplanes |
Unsafe Condition
Failure of the Stall Avoidance System (SAS) due to servo pusher degradation or improper calibration could result in loss of control during flight.
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Required Actions
Inspect, modify, and recalibrate the Stall Avoidance System (SAS) in accordance with specified Fairchild service bulletins. Perform functional checks with required pre-check run times for Bendix servos. Replace servo pushers with new, overhauled, or tested units if necessary.
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Compliance Time
Required within the next 100 hours time-in-service after the effective date (October 19, 1990) unless previously accomplished, and thereafter at intervals specified in the service bulletins (200, 500, or 2000 hours time-in-service).
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Affected Aircraft
FAIRCHILD AIRCRAFT CORPORATION models SA226-T (S/N T201-T275, T277-T291), SA226-AT (S/N AT001-AT419, specific E-designated serials), SA226-TC (S/N TC201-TC419, specific E-designated serials), SA226-T(B) (S/N T(B)276, T(B)292-T(B)417, T(B)303E), SA227-AC (S/N AC406, AC415-AC603), SA227-TT (S/N TT421-TT541), SA227-AT (S/N AT423-AT585), and airplanes with STC SA4725SW.
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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