AD Amdt-39-11021

final rule
Data completeness: 70%

Airworthiness Directives; Bombardier Model DHC-7 Series Airplanes

AD Number
Amdt-39-11021
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 98-NM-295-AD
FR Citation
64 FR 5587

Applicability

TypeManufacturerModelDetails
aircraft Bombardier DHC-7 Airworthiness Directives; Bombardier Model DHC-7 Series Airplanes

Unsafe Condition

Failure of the attachment bolts of the wing-to-fuselage attachment fittings due to stress corrosion cracking.

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

Required Actions

Remove all attachment bolts and pre-load indicating (PLI) washers of the wing-to-fuselage attachment fittings. Perform a one-time visual inspection to detect corrosion of each attachment bolt. Install new attachment bolts and PLI washers of the wing-to-fuselage attachment fittings.

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

Compliance Time

Before further flight.

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

Affected Aircraft

All Bombardier Model DHC-7 series airplanes.

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

Source: Official FAA Source ↗

Retrieved: Apr 6, 2026

Rights: U.S. Government Public Domain

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