AD 92-07-14

final rule
Data completeness: 70%

Airworthiness Directives; AIR TRACTOR INC Models AT-300, AT-301, AT-302, AT-400 and AT-400A Airplanes

AD Number
92-07-14
Status
final_rule
Effective Date
Product Category
aircraft
Docket
91-CE-55-AD
FR Citation
This information is not available.

Applicability

TypeManufacturerModelDetails
aircraft Air Tractor, Inc. AT-300 Airworthiness Directives; AIR TRACTOR INC Models AT-300, AT-301, AT-302, AT-400 and AT-400A Airplanes
aircraft Air Tractor, Inc. AT-301 Airworthiness Directives; AIR TRACTOR INC Models AT-300, AT-301, AT-302, AT-400 and AT-400A Airplanes
aircraft Air Tractor, Inc. AT-302 Airworthiness Directives; AIR TRACTOR INC Models AT-300, AT-301, AT-302, AT-400 and AT-400A Airplanes
aircraft Air Tractor, Inc. AT-400 Airworthiness Directives; AIR TRACTOR INC Models AT-300, AT-301, AT-302, AT-400 and AT-400A Airplanes
aircraft Air Tractor, Inc. AT-400A Airworthiness Directives; AIR TRACTOR INC Models AT-300, AT-301, AT-302, AT-400 and AT-400A Airplanes

Unsafe Condition

Failure of the wing structure that could result in loss of control of the airplane due to corrosion of the upper and lower aluminum spar caps from the centerline to outboard end.

AI-generated summary from the source AD text. Verify against the official source before acting.

Required Actions

Remove inspection plates on the lower side of the wing leading edge skin and visually inspect the spar caps for corrosion using a flashlight and mirror. Repair or replace the spar cap as specified in Air Tractor Inc. Service Letter No. 90, depending on corrosion severity. Compliance must be done within 90 calendar days after May 8, 1992, and repeated every 12 calendar months.

AI-generated summary from the source AD text. Verify against the official source before acting.

Compliance Time

within the next 90 calendar days after the effective date of this AD, unless already accomplished, and thereafter at intervals not to exceed 12 calendar months

AI-generated summary from the source AD text. Verify against the official source before acting.

Affected Aircraft

Air Tractor Inc. Models AT-300, AT-301, AT-302 (serial numbers 300-0001 through 301-0688); Model AT-400 (serial numbers 400-0244 through 400-0415); Model AT-400A (all serial numbers), certificated in any category.

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

This site is not affiliated with or endorsed by the FAA. Always verify with official sources.

View Official Source ↗ Find More ADs for Air Tractor, Inc. AT-300

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