Air Conditioning - Failed Air Conditioning Pack Electronic Flow Control in Aft Cargo Compartment - Dispatch Restrictions for Carriage of Cargo
- Published
- Effective
- Deadline
AI-generated summary of the official EASA document. Verify against the PDF before acting.
What to do
Operators of affected Boeing 737 models must not dispatch or release airplanes with cargo in the aft cargo compartment if the electronic flow control of air conditioning packs has failed. They should revise their FAA-approved MELs to reflect this restriction and comply immediately as the directive is effective August 9, 2021. Comments on the directive may be submitted by September 23, 2021.
Summary
The Air Conditioning - Failed Air Conditioning Pack Electronic Flow Control in Aft Cargo Compartment - Dispatch Restrictions for Carriage of Cargo is a final rule airworthiness directive issued by the FAA affecting Boeing 737-8, 737-9, 737-8200 (737 MAX), and certain 737-800 and 737-900ER series airplanes. It addresses a safety issue where failed electronic flow control of air conditioning packs reduces fire suppression capability in the aft cargo compartment. The directive prohibits carrying cargo in the aft cargo compartment if the electronic flow control of air conditioning packs has failed.
What changed
This new airworthiness directive prohibits dispatch or release of affected Boeing 737 models with cargo in the aft cargo compartment when the electronic flow control of air conditioning packs has failed. It allows only non-combustible or non-flammable empty cargo handling equipment, ballast, or fly-away kits in the aft cargo compartment under these conditions. The FAA plans to revise the Minimum Equipment Lists (MMELs) and requires operators to update their FAA-approved Minimum Equipment Lists (MELs) accordingly.
Why it matters
This directive is critical for aviation professionals because failed electronic flow control can cause increased airflow and air leakage in the aft cargo compartment, reducing the effectiveness of Halon fire suppression systems. Operators and maintenance teams must ensure compliance to prevent uncontained fires that could jeopardize flight safety. Compliance affects dispatch decisions and cargo loading procedures, impacting operational and safety protocols.
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