AD 91-05-14
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A300 B2-1A | Airworthiness Directives; AIRBUS INDUSTRIE Model A300 B2 and B4 Series Airplanes |
| aircraft | Airbus | A300 B2-1C | Airworthiness Directives; AIRBUS INDUSTRIE Model A300 B2 and B4 Series Airplanes |
| aircraft | Airbus | A300 B2-203 | Airworthiness Directives; AIRBUS INDUSTRIE Model A300 B2 and B4 Series Airplanes |
| aircraft | Airbus | A300 B2K-3C | Airworthiness Directives; AIRBUS INDUSTRIE Model A300 B2 and B4 Series Airplanes |
| aircraft | Airbus | A300 B4-103 | Airworthiness Directives; AIRBUS INDUSTRIE Model A300 B2 and B4 Series Airplanes |
| aircraft | Airbus | A300 B4-203 | Airworthiness Directives; AIRBUS INDUSTRIE Model A300 B2 and B4 Series Airplanes |
| aircraft | Airbus | A300 B4-2C | Airworthiness Directives; AIRBUS INDUSTRIE Model A300 B2 and B4 Series Airplanes |
Unsafe Condition
Excessive wear of the carbon friction disc of the no-back assemblies could lead to an asymmetric flap condition in the event of flap transmission shaft failure.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform jackhead axial backlash measurements on affected flap ball screwjacks according to Airbus Service Bulletin A300-27-172, and replace the flap ball screwjack within 250 landings if backlash exceeds 0.56 mm. Modify the flap ball screwjack assemblies by installing a new carbon friction disc, modified drive shaft, and collar within 18 months after April 1, 1991.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Required as indicated, unless previously accomplished. The modification in paragraph E must be completed within 18 months after April 1, 1991.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
AIRBUS INDUSTRIE Model A300 B2 and B4 series airplanes equipped with flap ball screwjack no-back mechanisms listed in Service Bulletin A300-27-172, not modified per Modification AI 5240.
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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