AD 80-04-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Thrush Aircraft, Inc. | 600 S-2D | Airworthiness Directives; Ayres Model S-2D, S-2R, S2R-T11, S2R-T15, S2R-T34 and S2R-R3S Airplanes |
| aircraft | Thrush Aircraft, Inc. | S-2R | Airworthiness Directives; Ayres Model S-2D, S-2R, S2R-T11, S2R-T15, S2R-T34 and S2R-R3S Airplanes |
| aircraft | Thrush Aircraft, Inc. | S2R-R3S | Airworthiness Directives; Ayres Model S-2D, S-2R, S2R-T11, S2R-T15, S2R-T34 and S2R-R3S Airplanes |
| aircraft | Thrush Aircraft, Inc. | S2R-T11 | Airworthiness Directives; Ayres Model S-2D, S-2R, S2R-T11, S2R-T15, S2R-T34 and S2R-R3S Airplanes |
| aircraft | Thrush Aircraft, Inc. | S2R-T15 | Airworthiness Directives; Ayres Model S-2D, S-2R, S2R-T11, S2R-T15, S2R-T34 and S2R-R3S Airplanes |
| aircraft | Thrush Aircraft, Inc. | S2R-T34 | Airworthiness Directives; Ayres Model S-2D, S-2R, S2R-T11, S2R-T15, S2R-T34 and S2R-R3S Airplanes |
Unsafe Condition
Cracks in the tubular front spar of the horizontal stabilizer in the area of the left and right fuselage attach bushings could lead to structural failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the horizontal stabilizer front spar tube (P/N 40221-19) within 25 hours time in service after the effective date and every 500 hours thereafter. If cracked, replace with P/N 40221-70 or a serviceable P/N 40221-61 and continue inspections every 500 hours. Adjust flying wires per Maintenance Manual.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 25 hours time in service after the effective date of this AD and thereafter at intervals not to exceed 500 hours time in service from the last inspection
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Ayres Models S-2D (all serial numbers), S-2R (S/N 1416R-2560R, 5000R-5100R), S2R-T11 (T11-001-002), S2R-T15 (T15-001-005), S2R-T34 (6000-6049, T34-001-019), S2R-R3S (R3S-001-008)
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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