Type training · Boeing 757-300 differences · ATA 26
Boeing 757-300 Differences: Cargo Fire Protection (ATA 26)Type training questions & answers
The two-bottle cargo fire system with metered bottle 2 discharge for 180 minutes of protection.
- A worked explanation on every question
- Written for the 757-300, for engineers rated on the 757-200
- Read in English or 15 other languages
Sample Cargo Fire Protection questions with answers
Three questions from the free preview. Think of your answer first, then open the explanation.
1.How do the two 757-300 cargo fire bottles discharge into the selected compartment?
- A.Bottle 2 only after 30 minutes
- B.Bottle 1 fast, bottle 2 metered
- C.Both bottles dump at the same time
Show answer and explanation
Correct answer: B. Bottle 1 fast, bottle 2 metered
Bottle 1 empties quickly to knock the fire down. Bottle 2 releases slowly through pressure regulators to keep the agent concentration up. On the 757-200 both bottles release their contents quickly.
2.How long does the 757-300 lower cargo fire extinguishing system protect a compartment?
- A.60 minutes
- B.75 minutes
- C.180 minutes
Show answer and explanation
Correct answer: C. 180 minutes
The fast discharge from bottle 1 plus the metered flow from bottle 2 gives 180 minutes of fire protection for the forward or aft compartment.
3.What gives the metered release from 757-300 cargo fire bottle 2?
- A.Pressure regulators
- B.Orifice nozzles
- C.A timed squib
Show answer and explanation
Correct answer: A. Pressure regulators
Two pressure regulators in the bottle 2 distribution tubing to the FWD and AFT compartments release agent at a constant rate. They must be replaced after a discharge.
Part of the Boeing 757-200 to -300 differences course
One chapter of the Boeing 757-200 to -300 differences course question bank, for the 757-300, for engineers rated on the 757-200, written in our own words for revision. Your type course and the aircraft maintenance manual stay the authority: limits and procedures can differ between airframes and operators.
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