AD 99-01-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A320-111 | Airworthiness Directives; Airbus Model A320 Series Airplanes |
| aircraft | Airbus | A320-211 | Airworthiness Directives; Airbus Model A320 Series Airplanes |
| aircraft | Airbus | A320-212 | Airworthiness Directives; Airbus Model A320 Series Airplanes |
| aircraft | Airbus | A320-214 | Airworthiness Directives; Airbus Model A320 Series Airplanes |
| aircraft | Airbus | A320-231 | Airworthiness Directives; Airbus Model A320 Series Airplanes |
| aircraft | Airbus | A320-232 | Airworthiness Directives; Airbus Model A320 Series Airplanes |
| aircraft | Airbus | A320-233 | Airworthiness Directives; Airbus Model A320 Series Airplanes |
Unsafe Condition
Fatigue cracking in the bottom panels of the keel beam at the frame 46 and stringer 37 intersection at the pressure bulkhead.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Perform an ultrasonic inspection of the keel beam panels to detect cracking before 30,000 total flight cycles or within 6 months after the AD's effective date, whichever is later. Repeat inspections every 6,000 flight cycles. Repair any cracks before further flight. Accomplish Airbus Modification 21202 as terminating action.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to the accumulation of 30,000 total flight cycles, or within 6 months after the effective date of this AD, whichever occurs later. Thereafter, repeat inspections at intervals not to exceed 6,000 flight cycles.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Airbus Model A320 series airplanes where Modification 21202 (per Service Bulletin A320-53-1033) has not been accomplished.
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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