AD 98-07-23
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Airbus | A340-211 | Airworthiness Directives; Airbus Model A340 Series Airplane |
| aircraft | Airbus | A340-212 | Airworthiness Directives; Airbus Model A340 Series Airplane |
| aircraft | Airbus | A340-213 | Airworthiness Directives; Airbus Model A340 Series Airplane |
| aircraft | Airbus | A340-311 | Airworthiness Directives; Airbus Model A340 Series Airplane |
| aircraft | Airbus | A340-312 | Airworthiness Directives; Airbus Model A340 Series Airplane |
| aircraft | Airbus | A340-313 | Airworthiness Directives; Airbus Model A340 Series Airplane |
Unsafe Condition
Anomalies in the software installed in the electronic control unit (ECU) on each engine may cause significant thrust loss during initial climb, increasing the risk of collision with obstacles.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Revise the Airplane Flight Manual (AFM) to include procedures for flightcrew to turn off one bleed pack and all engine bleeds prior to takeoff and turn them on after thrust reduction. Install a new or modified electronic control unit (ECU) on each engine to terminate the AFM revision requirement.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
No specific compliance time stated in the source. The AD applies to airplanes not yet modified and requires actions upon import to the U.S. register.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Airbus Model A340-211, -212, -213, -311, -312, -313 series airplanes where Airbus Modification 45504 (Service Bulletin A340-73-4012, Rev 1) 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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