AD 90-20-05
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aviat Aircraft Inc | A-1 | Airworthiness Directives; CHRISTEN INDUSTRIES, INC. Model A-1 (Husky) Series Airplanes |
Unsafe Condition
Failure of the forward seat back, 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
Within 25 hours time-in-service after the effective date, visually inspect both sides of the front seat back for cracks using a 10x glass on the weld area between Part Number 35039-008 and 35034-005. If cracks are found, modify the seat with the reinforcement kit per Service Bulletin No. 2 before further flight. Within 100 hours TIS, install the reinforcement kit unless already modified under paragraph (a)(2).
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Compliance Time
Within the next 25 hours time-in-service (TIS) after the effective date of this AD, and thereafter at intervals of 25 hours TIS. Alternatively, within the next 100 hours TIS unless modified under paragraph (a)(2).
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Affected Aircraft
CHRISTEN INDUSTRIES, INC. Model A-1 (Husky) Series airplanes, serial numbers 1001 thru 1125.
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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