Before dispatch with inoperative AC packs, which document should you verify?

Before dispatch with inoperative AC packs, which document should you verify?

• A. MEL
• B. AFM
• C. QRH
• D. FCOM

Answer: (A)

The key idea is knowing which document governs operating with equipment out of service. The Minimum Equipment List shows what can be left inoperative and still permit a flight, along with any conditions, limitations, or required maintenance actions. For inoperative air conditioning packs, you’d consult the MEL to confirm whether dispatch is permitted and what restrictions apply (such as temperature limits, route or altitude constraints, or the need for alternate cooling arrangements). The other manuals—aircraft flight manual, quick reference handbook, and the flight crew operating manual—cover normal operations, abnormal procedures, and system procedures but do not authorize or define the specific dispatch allowances for equipment that is not operating.

The key idea is knowing which document governs operating with equipment out of service. The Minimum Equipment List shows what can be left inoperative and still permit a flight, along with any conditions, limitations, or required maintenance actions. For inoperative air conditioning packs, you’d consult the MEL to confirm whether dispatch is permitted and what restrictions apply (such as temperature limits, route or altitude constraints, or the need for alternate cooling arrangements). The other manuals—aircraft flight manual, quick reference handbook, and the flight crew operating manual—cover normal operations, abnormal procedures, and system procedures but do not authorize or define the specific dispatch allowances for equipment that is not operating.