Boeing 757-300 differences
757-300, for engineers rated on the 757-200
What changes on the longer 757-300, chapter by chapter. 215 questions in 8 chapters, each with a worked explanation. 5 questions in every chapter are free; the rest come with the same subscription as the Part 66 modules.
Chapters
8 chapters · 215 questions
- ATA 21Air ConditioningThe four-zone temperature control with the new MID cabin zone, trim air valves, the zone controller and recirculation.31
- ATA 22Yaw Damper and Stabilizer TrimThe YSMs that replace the -200 yaw damper and stabilizer trim modules, modal suppression, speed trim and YSM BITE.37
- ATA 23Emergency Locator TransmitterThe 121.5/243/406 MHz ELT, its battery, G switch, reset and test rules.16
- ATA 25Cargo Loading and Off-Wing EscapeThe optional bellyloader cargo system and the four-hatch off-wing escape slides: bottles, MCV, ASV and P61 tests.30
- ATA 26Cargo Fire ProtectionThe two-bottle cargo fire system with metered bottle 2 discharge for 180 minutes of protection.18
- ATA 27Flight ControlsSix-module CSEUs, elevator feel shift and feel limit, flap skew detection, the FSAM and spoiler tail strike protection.34
- ATA 32Tail Skid, Tail Strike and SteeringThe retractable tail skid, the tail strike sensor, drag-strut engaged pedal steering and brake temperature tests.24
- ATA 38Vacuum Waste SystemVacuum toilets, waste tanks, blowers, the flush cycle and waste quantity indication.25
Try a few
One free question from each of 6 chapters. Pick your answer, then open the explanation.
ATA 21 · Air Conditioning
How many temperature zones does the zone temperature control system control on the 757-300?
- A.Four
- B.Three
- C.Five
Show answer and explanation
Correct answer: A. Four
Flight deck, FWD, MID and AFT cabin. The 757-200 has three zones (flight deck, FWD and AFT), so the MID cabin zone is new on the longer airplane.
ATA 22 · Yaw Damper and Stabilizer Trim
On the 757-300, which units do the yaw damper and stabilizer trim functions?
- A.Two YDMs and two SAMs
- B.Three FCCs and the MCDP
- C.Two YSMs in the CSEUs
Show answer and explanation
Correct answer: C. Two YSMs in the CSEUs
The yaw damper/stabilizer trim modules (YSMs) are CSEU modules that combine both jobs. The 757-200 uses separate yaw damper modules (YDMs) and stabilizer trim/elevator asymmetry modules (SAMs).
ATA 23 · Emergency Locator Transmitter
What powers the ELT transmitter in the 757-300 differences course?
- A.The 28 V DC ground service bus
- B.Its own battery pack
- C.The hot battery bus
Show answer and explanation
Correct answer: B. Its own battery pack
The transmitter does not use airplane power. Four D-size lithium manganese dioxide cells in series give it 12 V DC.
ATA 25 · Cargo Loading and Off-Wing Escape
What is the Scandinavian bellyloader cargo (SBC) system on the 757-300?
- A.An optional bulk cargo conveyor
- B.A standard ULD loading system
- C.A powered cargo door actuator
Show answer and explanation
Correct answer: A. An optional bulk cargo conveyor
It is an option that moves bulk baggage along the lower hold on a conveyor belt (carpet), so loaders do not have to crawl to the far end of the compartment.
ATA 26 · Cargo Fire Protection
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.
ATA 27 · Flight Controls
How many modules does each 757-300 CSEU contain?
- A.Four
- B.Six
- C.Eight
Show answer and explanation
Correct answer: B. Six
Two PSMs, three SCMs and one YSM. The 757-200 CSEU has eight modules, with separate stabilizer trim/elevator asymmetry, rudder ratio changer and yaw damper modules.
Questions about this course
What does this course cover?
What changes on the longer 757-300, chapter by chapter. It is written for the 757-300, for engineers rated on the 757-200, in 8 chapters that follow the ATA order of the type course.
Why are the courses kept apart?
So you only practise what your own course covers. The Boeing 757 B1.1 type course and the Boeing 757 B2 type course have their own question banks.
Is it included in the subscription?
Yes. Every chapter has 5 free questions to try, and all 215 questions come with the same Part66Exams subscription as the Part 66 modules, at no extra cost.
Are these the questions from my course exam?
No. They are written in our own words for revision. Your type course and the aircraft maintenance manual stay the authority, as limits and procedures can differ between airframes and operators.
Can I practise in another language?
Yes. Every question can be read in English or 15 other languages, with a switch back to the original English.