AD 2001-17-23

final rule
Data completeness: 70%

Airworthiness Directives; Bombardier Model DHC-8-100, -200, and -300 Series Airplanes

AD Number
2001-17-23
Status
final_rule
Effective Date
Product Category
aircraft
Docket
Docket No. 99-NM-371-AD
FR Citation
66 FR 45570

Applicability

TypeManufacturerModelDetails
aircraft Bombardier DHC-8-100 Airworthiness Directives; Bombardier Model DHC-8-100, -200, and -300 Series Airplanes

Unsafe Condition

Damage of the upper wing ladder plates, which could result in displacement of the adjacent channel seals and consequent reduced lightning strike protection of the fuel tanks.

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

Required Actions

Perform a one-time detailed visual inspection to detect damage of the ladder plates and access cover areas of the upper surface of the wings. Repair any detected damage within specified limits using the de Havilland Dash 8 Generic Structural Repair Schemes Manual. Install new 0.103-inch-diameter O-ring seals. For damage outside specified limits, repair using an approved method and install new O-ring seals.

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

Compliance Time

Within 9 months or at the next maintenance period during which the fuel tanks are accessed after the effective date, whichever occurs earlier.

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

Affected Aircraft

Bombardier Model DHC-8-100, -200, and -300 series airplanes, having serial numbers 003 through 528 inclusive and 531, 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 6, 2026

Rights: U.S. Government Public Domain

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